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Machine Learning (ML) is becoming increasingly popular and is being adopted in real-life AI applications across different industries. Creating a real-world AI application often requires extensive work with unstructured data. In fact, ML engineers and data scientists spend more than 80% of their time on data preparation and labeling and only a fraction of their time on the so-called fun stuff: reading research papers, training models, trying new architectures, tuning hyperparameters, deploying, monitoring, etc.

best data labeling tools

Since ML engineers are spending such a huge portion of their time on structuring, labeling, versioning, and debugging datasets to become AI-ready training data (aka SuperData), data labeling toolsets have become essential for building scalable AI applications. However, data labeling tools or simple data labeling editors are far away from covering all the growing needs of anyone's complex ML pipeline.

We identified 6 essential components that make data labeling tools a compelling solution for building modern AI pipelines. Namely, annotation software, AI data management and curation, integrations and security, project and quality management, and automation.

Therefore, this article is neither about simple data labeling tools using open-source software such as label studio, cvat, labelme, nor is it about specific functionalities within labeling editors such as bounding boxes, polygons, text labeling, etc.

We will cover various types of data labeling companies, along with their history and functionalities, detailed feature sets, additional AI pipeline-oriented components, and much more. We will rely on one of the most reliable software ranking marketplaces, G2, where data labeling is a separate software category within various AI software. As we indicated above, for each company/solution, we will cover the following:

We will be updating this article quarterly and tracking all the position changes, feature releases, large news, and announcements.

1. SuperAnnotate

Ranked as the best data labeling platform in G2, SuperAnnotate builds an end-to-end data solution with an integrated service marketplace, where they help their customers to find the right annotation team within the preferred geographic location and proficiency. The labeling teams are directly integrated into SuperAnnotate's platform and managed by their professional project managers which is reported to be one of their key strengths. The company also provides data on its platform with various labeling tools without annotation services.

Company history: Started as a Ph.D. research, SuperAnnotate was founded in 2018, primarily as an image annotation tool for semantic segmentation, but quickly gained momentum and extended into other areas of ML pipeline development. SuperAnnotate raised about $22M from investors such as P9 and Base10.

Key features: The software itself focuses on 5 key components of the AI lifecycle:

  • Data labeling tools and efficient project management
  • AI dataset management, data curation, and version control
  • AI model management, model comparison, and versioning
  • Automation and orchestration via various triggering systems (available for enterprises)
  • Annotation Service Marketplace

Data labeling tools: On the labeling side, the company started with image annotation capabilities. Over the last 2 years, SuperAnnotate launched the video and text annotation editors. Earlier in 2022, SuperAnnotate's platform evolved into LiDAR and audio labeling. Fasting forward, they just introduced more targeted labeling data formats, such as native PDF, DICOM, etc. 2023 was remarkable for SuperAnnotate's large language models (LLMs) playground and use cases, as well as LLM fine-tuning.

LLMs: SuperAnnotate recently released its LLM playground where users can try ready-made templates for their LLM and GenAI use cases, such as supervised fine-tuning, chat rating, RLHF for image generation, model comparison, GPT fine-tuning, and video captioning. Users can also create a custom template for their specific use case by clicking on the templates.

MLOps: While covering different data formats, it is also important to cover other MLOps capabilities, which makes such annotation tooling companies more compelling within the entire AI lifecycle. On that end, SuperAnnotate’s capabilities become very attractive for any startup or enterprise users. More particularly, easy project management, data curation, data versioning, model management, automation, and complete SDK allow customers to automate incredibly complex AI pipelines (as reviews confirm).

Security: SuperAnnotate also offers multiple levels of data security, allowing users to store their datasets on their premises or in SuperAnnotate’s encrypted S3 buckets. The company owns several certifications, including SOC2 Type II on the software side and ISO 27001, GDPR, and HIPPA compliance.

Annotation Services: On the services side, SuperAnnotate vetted over 400 annotation service teams and allows its users to find teams in different geographies, languages, and medical experts, as well as relatively cost-efficient annotation services for easier tasks such as image classification.

G2 review summary: SuperAnnotate is wrapping up 2023 with over 10 G2 badges for winter, leading the data labeling category in EMEA with high performance both on MLOps and image recognition.

Out of the 123 reviews (4.9/5), most users believe that SuperAnnotate’s platform is super-user-friendly and contains all the features required for annotating unstructured data. Many praise the platform's data management and ability to track the progress of annotation tasks across different projects while leveraging useful metrics. They say it's easy to roll back and make changes while annotating. Users also assure they do not experience major problems with the tool at all. When faced with minor issues, the support service is always there to assist in a timely manner. They claim that the product team is always open to suggestions and is highly interested in client feedback. There is a mention of how the upload and export of pipelines are a bit burdensome when just starting, yet the user also adds that SuperAnnotate is always adding useful functionality to reduce these issues.

Users are particularly concerned about data security and claim it is one of the main reasons they chose SuperAnnotate over other platforms.

Pricing: The software is FREE for up to 3 users and 5.000 data items. For higher-level commitments, make sure to consult with the sales department.

2. Encord


Company history: Established in 2020 by former quants, physicists, and computer scientists, Encord's technology foundation was built on ideas from quantitative research in financial markets. Encord's mission is to support the creation of active learning pipelines, including training, diagnosis, and validation of models, annotation, management, and evaluation of training data.

Services: Encord offers AI-assisted labeling, model training and diagnostics, detecting and fixing dataset errors and biases, and an all-in-one collaborative active learning platform.

Security: The tool ensures that both the user's and their customer's data is safe and secure. The company owns certifications such as HIPPA, SOC2, GDPR, and AICPA. 

G2 user summary: Holding the 2nd spot on G2's list, Encord has the "3rd Easiest To Use in Data Labeling Software" title. It has a rating of 4.8/5 and a total of 60 reviews. Most users express that the tool is flexible and user-friendly, with easy-to-use annotation tools. However, many also mentioned that they encountered a bit of a learning curve and some minor performance issues when working on large datasets at the beginning. It's also mentioned that the tool might benefit from customization options.

Pricing: Encord offers three pricing options; a free one, a team option, and an enterprise.

3. Kili


Company history: What started as a simple business idea in 2018 is now known as Kili. The goal of the two founders was to ensure that data is no longer a barrier to good AI. By 2020, the Kili platform went live, began operating as a data labeling tool, and has managed to raise a total of $31.9M in funding.

Data labeling tools: Kili's AI training data platform assists large organizations in transitioning from "big data" to "good data."

DataOps and services: The platform combines collaborative data (image, video, text, audio, and OCR) annotation with data-centric workflows, automation, curation, integration, and simplified DataOps to create high-quality AI. Moreover, Kili offers a fully managed expert labeling workforce to seamlessly ramp up projects without having in-house annotators on board.

G2 user summary: Kili is #3 with a rating of 4.7/5 and 49 reviews, earning the title of "4th Easiest To Use" data labeling software on G2. Kili has proved to be helpful to users because of its ability to collaborate among different teams. It's user-friendly and has an intuitive platform. However, some indicate that the tool cannot handle massive loads of data during the training phase. The project creation process can be time-consuming and tiresome. Also, some users needed more advanced analytics for better monitoring. There was also a need for broader and more flexible video annotation features.

Pricing: Kili has three different price packages: a free Community version, a Start Custom Plan, and an Enterprise Plan.

4. Appen


Company history: Founded in 1996, Appen is a licensed platform that allows annotating training data use cases in computer vision and natural language processing. It provides data sourcing, data labeling, and model evaluation. The company’s funding and valuation are private, yet it's one of the oldest solutions in the market and has demonstrated experience in managing data for the AI lifecycle.

Data labeling tools: Appen supports data sourcing (pre-labeled datasets, data collection, synthetic data generation), data preparation, and real-world model-evaluation needs, allowing users to develop and launch models with confidence, saving time to focus on other priorities.

Security: The platform is compliant with data security requirements, especially when dealing with personally identifiable information (PII), protected health information (PHI), and other specific regulations.

G2 user summary: Appen is #4 on G2’s list, with a 4.1/5 rating and 26 reviews. Many users emphasize that Appen’s data labeling process, tracking, and storing are noteworthy. The users explain that the website is simple, easy to use, and provides a wide range of projects. The not-so-positive aspect is that the invoicing method can be challenging, project qualifications can be delayed, servers tend to crash frequently, and many users find themselves flooded with Appen emails.

Pricing: Does not have a free trial.

5. Dataloop


Company history: Founded in 2017, Dataloop is an end-to-end platform covering every step from development to production with a technology that also comprises a data management and labeling platform. It has raised an estimated $50M at this time of writing.

Data labeling tools and project management: When it comes to data labeling tools, Dataloop provides a toolset for image, video, and text annotation formats. It's an end-to-end platform that covers annotation (image, video, and LiDAR), data QA and verification, data, workforce and project management, and automation. Dataloop also provides a generative AI platform for building, evaluating, and deploying GenAI models.

Security: The platform is an enterprise-ready solution committed to ensuring top-quality data organization and collaboration that's in line with key security and privacy standards across the industry.

G2 user summary: Reserving the 5th spot on the list, Dataloop has a rating of 4.4/5 and 60 reviews. Most of the reviews are proof that Dataloop is fairly simple to use and provides good services. Many express that Dataloop’s software is very helpful in the administrative field and in getting the labeling done in a short period of time. There are some complaints about Dataloop’s constant price increase since they rise with each update, as per reviewers. Users also state that the tool’s performance occasionally slows down when working with large datasets.

Pricing: Offers a free trial, no other pricing information disclosed.

6. V7


Company history: Founded in 2018, V7Labs was initially built as an image annotation tool and then extended toward model building and automation functionalities. Prior to V7Labs, the founders built a company called AIPoly, which enables the visually impaired to see and name various objects through the phone camera. The company is based in the UK and has raised around $43M.

Data labeling tools: On the business side, V7Labs focuses on visual data, helping customers to solve primarily computer vision problems. V7 also has auto annotation, model management and document processing systems, and other dataset management features that allow users to create training sets for their experiments.

Services: V7’s annotation services offer dozens of agents to label and refine images, yet it also gives users the opportunity to bring in their own labeling team to create training data or support the human-in-the-loop processes.

G2 review summary: As we write this article, the company has a 4.8/5 rating with a total of 51 reviews, earning itself the 4th spot on the list and holding the title of “2nd Easiest To Use” data labeling software on G2. Almost everyone’s experience with their product is smooth and undisturbed, and they are reactive toward their users' feedback and suggestions. Many mention that the tool saves them a lot of time, especially when labeling data with auto segmentation. Users also recall that V7's occasional tendency to lag when working with large datasets increases the number of times users spend on a specific project. A few users comment on security glitches (data becomes available to the public) and inconsistent billing computations.

Pricing: V7 offers 4 payment options: Free, Business, Pro, and Enterprise.

7. Amazon SageMaker Ground Truth

amazon sagemaker ground truth

Company history: Launched in 2018, the Amazon SageMaker Ground Truth was initially built to allow users to identify raw data, add informative labels, and produce labeled synthetic data to create training datasets for machine learning models. It also offers two versions: Amazon SageMaker Ground Truth Plus and Amazon SageMaker Ground Truth.

Data labeling tools: Amazon SageMaker Ground Truth helps users build accurate training datasets for machine learning and AI models in a timely manner.
Project management and services: As a user, here you can not only improve the quality of your training datasets but also set up labeling workflows, apply ML-powered automation, choose your own data labeling workforce, and increase the visibility of data labeling operations.

G2 user summary: The tool is in 6th place on the G2 list with a rating of 4.1/5 and 19 reviews. It was selected as the 3rd easiest to use data labeling software. According to the user reviews, Amazon's product is simple, reduces costs and time, and lessens constant human involvement when it comes to data labeling.
However, many users complain about the pricing being too high and their inability to save both money and storage as the endpoint cannot be turned off.

Pricing: Has a free trial, and for the first two months after using Amazon SageMaker, the user’s first 500 objects labeled per month are free.

8. Cogito Tech LLC

cogito tech llc

Company history: Cogito LLC, founded in 2014, has established itself as a leader in providing AI training data, specializing in human-in-the-loop workforce solutions. Their expertise spans several areas including computer vision, natural language processing, content moderation, and data & document processing.

Data labeling tools: Cogito LLC offers a range of data labeling tools as part of their services. These tools are designed to cater to various data types and formats, enabling accurate and efficient data annotation for different industry needs.

Security: In terms of security, Cogito takes data confidentiality seriously, complying with GDPR, CCPA,HIPAA, and SOC 2 Type II certifications.

G2 user summary: Cogito is the #8 data labeling tool on G2, with a rating of 4.7/5 and 12 reviews. Reviews from G2 for highlight their proficiency in data annotation, particularly praising their skilled team, accuracy in annotations, efficient project handling and customer service. Minor concerns include occasional inconsistencies in annotations and suggestions for improved project management tools. Clients across sectors like healthcare, automotive, and small businesses commend Cogito's flexibility, responsiveness, and ability to adapt to evolving requirements, noting their competitive pricing and efficient collaboration.

Pricing: The company customizes its solutions based on the specific requirements of each project, so the cost can vary. For detailed pricing information, it would be best to contact Cogito directly.

9. Labellerr


Company history: Labellerr was founded in 2018 by Puneet Jindal, who, after leading machine learning teams for seven years, was motivated by the high failure rate of AI projects. Identifying data preparation as a critical bottleneck in AI workflows, he and his team developed a "Smart feedback loop" technology to automate stages in computer vision workflows. Within 12 months, Labellerr secured its first enterprise customers, focusing on solving problems for ML teams in industries like automotive, medical imaging, and manufacturing. The platform enables collaboration, ensures data quality, and reduces project timelines.

Data labeling tools: Labellerr offers a variety of annotation types, including vector annotations (boxes and polygons) and pixel-wise annotations. The platform is especially adept at handling medical imagery but can cater to different domains. Features like superpixel segmentation and brushes assist in precise labeling, while its ability to annotate DICOM imagery sets it apart.

G2 user summary: Labellerr is #9 on G2 with 18 reviews and a 4.8/5 rating and users laud its streamlined annotation features, highlighting its prowess in quickly and accurately tagging images, videos, and PDFs. Its intuitive interface is a hit for handling vast datasets, offering scalability for extensive annotation tasks. Despite high marks for efficiency and usability, feedback points to a need for more direct machine learning tool integrations and enhancements in software stability, underscoring areas for future development.

Pricing: The company offers three plans – Starter ($49/mo), Pro ($299/mo), and Enterprise (custom).

10. Keymakr


Company history: With a mission to build and shape better technology, Keymakr started as a 10-people-company back in 2015. Now, it is considered one of the top data labeling companies that offers annotation services for image, video, and document annotation, data creation, and collection.

Data labeling tools and services: Keymakr offers a wide range of services, including image, video, and document annotation, automation, dataset validation, open-source data collection, and data creation in Keymakr's dedicated studio based on specific company needs.

Security: With Keymaker your data is kept private and secure as they apply encryption, data expiration, VPN solutions, and more. Unfortunately, we did not find any documentation or youtube videos to better understand the capabilities of the platform.

G2 user summary: Keymakr is #10 on G2’s list of the best data labeling tools, with a 4.8/5 rating and 32 reviews. As for the reviews, the users did not concentrate on the platform and primarily talked about their services. Almost all of the customer reviews are signs of Keymakr’s responsiveness, work ethic, alignment, and customer service, as many state that they respect deadlines and do not overpromise. Some users did mention that, at times, communication can be delayed because of the difference in time zones and that Keymakr’s prices are a bit higher compared to other tools.

Pricing: Keymakr offers a free trial, yet it has 3 pricing editions; Startup, Business, and Business Pro.

11. Labelbox


Company history: Labelbox is a training data platform founded in 2017. The founders were building internal tools in different companies in the aerospace industry. They saw the pain of creating image annotation tools and came together to create a company to address their pain points. Nowadays, Labelbox builds real-world AI and machine learning with software built for industrial data science teams. The startup has received $190 million in funding from Gradient Ventures, First Round Capital, Kleiner Perkins, and Andreesen Horowitz (a16z).

Data labeling tools: Similar to Dataloop and SuperAnnotate, Labelbox also provides data labeling tools for various data types. The all-in-one platform is a foundation for users to easily build and improve training data for their AI.

Project management and services: It is designed around the following data pillars: AI-assisted labeling, data curation, data ops automation with Python SDK, workspace navigation and management, model training and diagnostics, as well as on-demand labeling services.

G2 user summary: With a 4.7/5 rating and 31 reviews and #11 ranking, G2 shows that Labelbox is effective and simple. The instructions are easy to follow, and many state that they can seamlessly track their progress while working on different tasks. However, users also indicate that the tool cannot handle multichannel images: there are occasional lags, the program can run slow during updates, and the UI tends to glitch.

Pricing: LabelBox has a 14-day free trial for small teams and even provides another Pro free trial for companies developing AI models.

12. Datature


Company history: Established in 2019, Datature allows users to build deep-learning models without a single line of code. Their cloud-based platform allows dataset management, annotation, training, and deployment.

Data labeling tools: Datature's MLOps platform facilitates deep-learning abilities for healthcare, medical, and manufacturing companies. It also offers cloud-based model training and AI-powered auto-segmentation tools for data labeling.

G2 user summary: Datature is the 12th tool on the list, with a 4.9/5 rating and 25 reviews. The reviews commend its user-friendly platform, ideal for beginners in deep learning, with efficient data tools and strong collaborative features. Users appreciate its comprehensive support for various computer vision applications and the ease of setting up pipelines. However, some noted limitations in the free plan and suggested improvements in features like platform tours and project management tools.

Pricing: Datature has three pricing plans; a Starter one which is free, a Developer option that costs $249 a month, and a Professional one which requires contacting their sales team.

13. Shaip


Company history: the idea of creating Shaip was initiated in 2018 when the two founders met a Fortune 10 company client. Their initial goal was to organize medical data to enhance patient care and decrease the costs of healthcare. Now, Shaip is a fully managed data platform that addresses the most pressing AI challenges.

Data labeling tools: The Shaip cloud platform is designed to label images, videos, text, speech, and audio, empowering more teams to build AI products. It is a human-in-the-loop ML platform that also offers specialty solutions grouped by industries.

G2 user summary: With a 4.3/5 rating and 22 reviews, #13 on the G2 list is Shaip Cloud. The reviews indicate that Shaip Cloud is a solid human-in-the-loop ML platform that helps label and manage training datasets for chatbots and NLP. Users appreciate the platform's efficiency in handling diverse language processing tasks and its transcription capabilities. On the other hand, many reviews confirm that instruction and training may be required in advance to take full advantage of the tool. Many also mention that the company needs to work on identification and speech recognition tasks. There were also mentions of the software failing to provide meaningful results.

Pricing: Does not offer a free trial, and the website does not provide any pricing information.

14. Playment/ TELUS International


Company history: Playment was founded in 2015 as a managed data labeling platform that generates training data for computer vision models. In 2021, it was acquired by TELUS International, a Canadian technology company that provides IT services and multilingual customer service to global clients.

Data labeling tools: Playment’s Ground Truth (GT) studio is a self-serve data labeling solution that provides ML-assisted 2D and 3D labeling tools for image, video, and sensor fusion annotation.

Services and security: It also prides itself on its extensive feature set, fully-managed labeling services, demonstrated dataset security, built-in quality controls, performance tracking, and powerful APIs for pipeline integration.

G2 user summary: Playment/ TELUS International is the #14 data labeling tool on G2, with a rating of 4.7/5 and 11 reviews. According to most user reviews, the tool stands out in its ability to foster accurate data labeling and management across different sectors to train and validate their model prototypes. Yet, there are some complaints about the pricing being a bit high and the reporting application not being customizable per user and project requirement.

Pricing: Does not have a free plan. No other information is available.

15. Scale Rapid

scale rapid

Company history: Founded in 2016, Scale Rapid is a labeling platform for machine learning teams to get training data. Established to solve issues of scaling data labeling pipelines to production-level volumes, the company now has $603M worth of investments.
Data labeling tools: With Scale Rapid, you can label data like 3D sensors, images, and video at speed while maintaining the annotation quality. Except for providing high-quality training data, and precise annotation, Scale Rapid also provides real-time feedback on annotation instructions, accelerating the data labeling process and model development.

Security: Scale cloud platform’s infrastructure and operations are compliant with industry best practice standards and regulations.

G2 user summary: Scale lands the 15th spot on the G2 list, with its 4.4/5 score and 11 reviews. Users agree on Scale Rapid's ease of use and convenience when it comes to annotating data within a short period of time. However, many do indicate that there is room for improvement and updates, as, sometimes, data gets hard to understand. Users also mention that the company should work on Redbrick AI’s UI and make it more user-interactive. Users would also like to see some price decrease.

Pricing: Does not have a free trial, instead, it offers two packages: Rapid and Enterprise.

16. Datasaur


Company history: Founded in 2019, Datasaur aims to further utilize and democratize artificial intelligence. The company aims to merge the industry’s best practices and offers a machine learning platform to its users.

Data labeling tools: As an NLP data labeling tool, Datasaur works with complex NLP requirements while providing quality, speed, and customization.

Security: As it states on their platform, Datasaur works with an independent auditor to maintain a SOC 2 Type 2 report.

G2 user summary: The company came #14 on the list, with 30 reviews and a 4.5/5 rating. Reviewers explain that the UI and UX are very responsive, and the tool is very user-friendly. However, they also mention that the program tends to be complex and overwhelming, especially if you lack prior knowledge. There are also mentions of the pricing being too much for individual users.

Pricing: The company does offer a free trial for individuals. But when it comes to bigger companies, Darasaur offers both Growth and Enterprise options, both of which will require you to contact their sales team.

17. UBIAI Text Annotation Tool

ubiai text annotation tool

Company history: UBIAI was founded in 2020 with the mission of providing accessible and affordable easy-to-use NLP tools, believing that such tools will democratize NLP and spread better decision-making.

Data labeling tools: UBIAI provides cloud-based solutions, services, and easy-to-use NLP tools that help users extract insights from unstructured documents. Their data labeling tools include auto labeling, document classification, Named Entity Recognition, OCR annotation, and more.

G2 user summary: With a 4.8/5 rating, 18 reviews, and a "High Performer for Spring 2023" badge, UBIAI reserves the 16th spot on G2's list. User reviews state that UBIAI's ML models were easy to train, understand, and auto-annotate the documents with. Many users also explain that they are very satisfied with the company's support team. Yet, they also mention that UBIAI's tool cannot train and keep up with complex NLP applications.

Pricing: UBIAI has four pricing options. A Basic one which is for a single user and is free of charge, a Team option which is $299 a month, a Team Pro which is $599, and an Enterprise one which is per quote.

18. Basic AI/Xtreme1

basic ai xtreme1

Company history: Established in 2019, Basic AI's Xtreme1 is a one-stop data-centric MLOps platform that ensures data manageability and automation throughout its AI lifecycle.

Data labeling tools: Xtreme1 especially stands out because of its LiDAR data labeling combined with image and video content, which for the most part, serves the autonomous driving industry. In terms of industry-specific tasks, it addresses object and lane detection, object tracking, and semantic segmentation. You can either start with a pre-trained model, integrate an existing one, or continuously train your own model.

G2 user summary: The 17th spot on the list belongs to Basic AI, with a rate of 4.2/5 and 25 reviews. According to most users, BasicAI’s data labeling software is high-quality, easy to use, and can be trained for good results. Users are excited about BasicAI’s support team always being around for help. The setback is that the tool can seem a bit confusing to beginners. Thus, prior knowledge and more training are required. Other areas that need further improvement, as per users, are image detection and image tracking, so they can better fit low-end desktops and laptops.

Pricing: Has a free trial.

19. Hive


Company history: Founded in 2013, Hive or Hive Data provides cloud-based AI solutions for understanding content and offers turnkey software products powered by proprietary AI models and datasets. Hive has raised a total of $120.7M in funding over 6 rounds.

Data labeling tools and services: Hive's APIs allow engineers to integrate pre-trained AI models that address content understanding needs. Hive's intelligent search APIs power visual similarity and text-to-image search. Here, you can streamline content moderation and labeling, automate search and authentication, and protect digital ownership. Besides, you can monitor and measure cross-platform sponsorship and better monetize premium ad inventory.

G2 user summary: Hive is #18 on the list, with a 4.4/5 rate and 10 reviews. Users find Hive data quite easy to use and effective for labeling and building AI solutions. Some of the downsides include overlapped images, unrecognized data, and slow query performance. Besides their data labeling tools, there are also mentions of pre-trained models being useless.

Pricing: Does not include any pricing information.

20. LinkedAI


Company history: Founded in 2018, LinkedAI is a web platform that allows users to build accurate training datasets using machine learning.

Data labeling tools: LinkedAI provides users with image labeling tools for classification, object detection, and segmentation with automation features.

Project management and services: It offers an end-to-end solution for data annotation with labeling tools, data generation, data management, automation features, and annotation services with integrated tooling.

G2 user summary: LinkedAI is #19, with a rating of 4.6/5 and 23 reviews. Reviewers indicate that LinkedAI’s model development is good, the platform is user-friendly, comprehensible, and provides efficient service for data labeling. On the other hand, many of the users did face issues with PIs monitoring and automated annotation and explained that it needed more training data.

Pricing: LinkedAI is free for students and has a start price of $50 each month per user. The Grow option is $84/mo per user, and the Enterprise plan is customizable.


segments ai

Company history: was founded in early 2020 by Otto Debals (CEO) and Bert De Brabandere (CTO), who completed their PhDs and gained industry experience, particularly in the automotive sector. The company initially launched as a data labeling solution for segmentation, focusing on the robotics and autonomous driving industries. Recognizing the challenges of manually labeling multiple modalities, evolved to offer multi-sensor support, integrating built-in projection steps and automation. They received funding in 2021 from YCombinator and other venture capital funds, including Merus Capital and Volta Ventures.

Data labeling tools: offers advanced data labeling tools designed for multi-sensor data annotation, particularly for autonomous vehicles and robotics. Their platform includes features for labeling various data types, such as 2D and 3D point clouds, using segmentation, cuboids, keypoints, polygons, and polylines. They emphasize efficient and accurate labeling across all sensors in a single interface, integrating AI-powered tools for faster and more precise labeling.

Security: The company is certified with ISO27001 and owns GDPR compliance.

G2 user summary: is #20 with a 4.5/5 rating and 16 reviews. Reviews highlight its efficiency in image labeling, with features like superpixels, brush, polygon, and auto-segmentation, leading to fast labeling times. Users commend its ease of use, particularly for 2D and 3D labeling, and the helpful Python SDK for exporting data. The platform is appreciated for its versatile annotation options and AI-assisted labeling, which enhance accuracy and save time. While praised for its image data annotation and seamless integration into ML pipelines, some users note a learning curve and occasional difficulties with 3D visualization and platform integration.

Pricing: offers Team ($9600 per year), Scale (custom quote), and Enterprise (custom quote) plans.

22. Swivl

Company history: Founded in 2018, Swivl utilizes an advanced NLP system that enables it to respond to a wide range of Self Storage inquiries across various subjects. Through 5 rounds of financing, Swivl has secured a cumulative funding amount of $1.3 million.

Data labeling tools: Their process entails training, evaluating, and refining customized machine learning models that enhance customer experiences through NLP, personalized search outcomes, and comprehensive data classification.

G2 user summary: With a 4.2/5 rating and 16 reviews, Swivl comes at #19 on the list. Most users explain that Swivl allows them to capture, distribute, and collaborate on videos, fostering teamwork and collaboration with stakeholders. They also mention that Swivl's ability to automate labor-intensive tasks such as recording, editing, and sharing videos enhances productivity. A drawback of the tool that is mentioned is its relatively slower execution speed, occasionally causing interruptions and delays during usage.

Pricing: Their pricing is $149/mo/user.



Company history: Long before the establishment of, the founder, Brad, had created TrueMotion. It was not until 2017 that started to provide the same technology used to build and utilize machine learning algorithms at TrueMotion. At this point of writing, is estimated to have $18.3M in funding.

Data labeling tools: is used to structure and label any type of data and automate the processing of images, videos, text, and audio. The platform's key capabilities also address data integration, AI workflows, quality controls, an active trainer, and a smart combiner (combining results from multiple annotators into a single output).

G2 user summary: is #22 on G2, with a score of 4.5/5 and 11 reviews. When listing the best things about, the users recall automated workflows and the ease of turning unstructured data into AI applications. Yet, many also complain about feature limitations and the cost of the platform.

Pricing: Offers a wide range of free trials.

24. Predictly

Company history: Having been around since 2014, Predictly is a cognitive computing company that provides strategic customer experience research and insights. Their software deals with customer brand experience and customer relationships.

Data labeling tools: Predictly provides data annotation, datasets, Pre-trained models, and AI-transformation services. Through their AI and machine learning-enabled automation, Predictly's solutions provide businesses with deep insights and digital solutions.

G2 user summary: Predictly is #23 on the list, with a rating of 4.4/5 and 15 user reviews. Users state that Predictly's tools run quickly and efficiently while also providing helpful insights and guidelines. On the downside, many explain that to give better predictions, the dataset processing needs to be remodeled.

Pricing: Does not include any pricing information.


jaxon ai

Company history: is a Training Data Platform (TDP) that was founded in 2017. It labels raw text data for training custom, domain-specific machine learning models.

Data labeling tools: provides a collaborative canvas and toolbox to expand and regularize the ML process. It combines augmented annotation with semi-supervised learning techniques to accelerate iterative machine learning development. It also uses generative AI to create synthetic data and fill in coverage gaps.

G2 user summary: The company holds the 24th spot on G2's list, with a 4.4/5 rating and 12 reviews. Most users commented that they like the platform because it is user-friendly and can be deployed to their preferred platform with accurate data labeling. However, most of them did dislike the fact that the platform does not have a free trial, even for its basic features.

Pricing: As you can assume from the users' complaints, does not offer a free trial. It offers a Cloud Edition which costs $5 an hour and an Enterprise Edition which requires further contact with their sales team.

26. Innotescus Image and Video Annotation Platform

The data labeling solution does not exist anymore, despite being #25 on G2.


trainingdata io

Company history:, founded in 2019 by a former Netflix employee, is a tool that specializes in medical imagery annotation, though it's versatile enough for other uses as well. Based in Palo Alto, the platform was developed in close collaboration with early clients to address specific annotation needs effectively. It stands out for its unique ability to annotate DICOM imagery and its support for various annotation formats.

Data labeling tools: The platform supports vector annotations (like boxes and polygons) and pixel-wise annotation. Unique features include superpixel segmentation, brushes of different shapes, magnifiers, intuitive polygon sculpting, and settings to prevent invalid annotations. The tool also stands out for its ability to annotate DICOM imagery and supports standard JSON annotation formats and PNG masks. Additionally, it offers pre-labeling using medical imagery models and tools for video annotation and point cloud annotation development.

Security: emphasizes data security by offering on-premise installation using Docker, catering to the need for robust data protection, especially for sensitive medical imagery.

G2 user summary: is appreciated for its large pool of qualified annotators and various annotation tools, helping businesses grow. However, the platform's speed with specific tools and features is noted as slow, and some advanced features are limited to paid plans. Users praise the data security and privacy controls and their flexibility in integrating multiple software and AI tools. The platform, while user-friendly, sometimes experiences slowdowns and downtime, particularly when importing large datasets. Some users consider the service to be high, suggesting a need for more affordable options or a lite version for startups.

Pricing: The company offers a free version, allowing up to 200 images per year with up to five collaborators. For more extensive needs, Pro ($10/mo first user, $10/mo additional user), Radiology ($50/mo first user, $50/mo additional user), and Enterprise versions are offered.

28. Ango Hub

ango hub

Company history: Launched in 2020, Ango Hub is an all-in-one data la platform for AI teams. It is often coming off as a data labeling solution for medical AI. Ango Hub has managed to raise $820K throughout its two operating years.

Data labeling tools: Ango Hub is a data annotation platform that provides users with internal tools for data labeling, a real-time issue system, sample label libraries, and more. It offers annotations for images, videos, text, audio, and PDF.

G2 user summary: Ango Hub earned its #27 spot on G2, with a rate of 4.8/5 and 11 reviews. Users think the platform performs well with heavy video tasks and large PDF files. The tools for labeling text data and classification are quick, and the team is very responsive. However, many users share that there is a learning curve, some features and shortcuts are hard to spot, and the function to zoom into audio waveforms is missing. Users also comment that the UI could be improved, and it is tiring to import assets from the cloud as Ango Hub requires users to make a JSON with individual URLs.

Pricing: Ango Hub has three pricing options: the Free package, which is limited to 5 users and 10k annotations, the Cloud version, and the Enterprise, which will require connecting to the sales team to learn more about the pricing.

29. Supervisely


Company history:
Since 2013, the founders have been trying to build end-to-end solutions for clients from different parts of the world. Yet it was not until 2017 that Supervisely saw the light of day when the company changed its primary focus from services to products.

Data labeling tools and project & QA management: Supervisely offers image, video, DICOM, and LIDAR labeling. Here you can additionally manage datasets, perform quality assurance on your data and train high-performance neural networks.

G2 user summary: The #29 on the list is Supervisely, with a score of 4.7/5 and 10 reviews. Users observe significant performance improvement while using Supervisely. The solution enables them to establish a platform that can integrate a large number of open-source tools and custom-built solutions. Yet users also share that the UI can be tricky and overwhelming for new users and that the platform speed could be improved.

Pricing: Offers a free Community version of the tool while also providing a 30-day free trial for the Enterprise version.

30. Text Classifier with auto Deep Learning by Mphasis

Company history: Founded in 2009, Mphasis DeepInsights is a cloud-based cognitive computing platform that provides data extraction and predictive analytics abilities.

Data labeling tools: This solution evaluates deep learning models of various architectures on user-provided data. It identifies the most suitable deep learning model architecture based on validation metrics for text classification. It also automates many deep-learning tasks in data science.

G2 user summary: With a 4.4/5 and 13 reviews, Text Classifier with auto Deep Learning comes #30 on the list. Users explain that the tool is a big time-saver, especially when dealing with large and complex datasets. Many also indicate that the tool is intuitive, easy to use, and doesn't require any prerequisites. Yet, they also mention that when dealing with large amounts of datasets, the process can become time-consuming, and it takes up plenty of memory space even when dealing with smaller datasets.

Pricing: Does not offer a free trial.

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