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Best AI Data Labeling Tools in 2026

Labeled data supports machine-learning work, and the tools here can be compared by the data types and workflows they list. Supported modalities help you check fit for the material you handle; model-assisted labeling and human review workflows offer further points to consider. If your process needs a particular structure or connection, compare custom ontologies, API access, and deployment options. Free-plan availability and paid-from pricing add purchasing context. doccano, Label Studio, and Alibaba Cloud PAI iTAG are among the entries shown, alongside BRAT, Roboflow, and others. Consider how the listed capabilities align with your annotation tasks, review steps, and technical setup.

  1. 1

    doccano

    Free plan Open source AndroidAPIiPhone+5

    doccano combines dataset labeling workflows with collaboration, APIs, and multiple deployment choices. Note the SQLite upgrade warning when selecting the default database.

    9.0 Open source Visit site
  2. 2

    Label Studio

    Free plan Open source APILinuxMac+3

    Label Studio covers a wide range of annotation workflows, deployment options, and integrations.

    8.8 Free plan Visit site
  3. 3

    VGG Image Annotator

    Free plan Open source LinuxMacSelf-hosted+2

    VIA offers offline manual annotation and several export options at no cost. Choose VIA3 for audio, video or shared projects; VIA2 remains maintained but is limited to images and lacks sharing.

    8.5 Free plan Visit site
  4. 4

    Alibaba Cloud PAI iTAG

    Free plan APILinuxWeb+1

    iTAG provides varied labeling tasks and review workflows, but its current availability is restricted. New users looking for AI-powered automatic labeling are directed to another feature.

    7.7 Free plan Visit site
  5. 5

    Argilla

    Free plan APILinuxSelf-hosted+1

    Argilla brings dataset annotation, feedback collection and collaboration into one tool, with deployment and portability options for teams.

    7.6 Free plan Visit site
  6. 6

    BRAT

    Free plan LinuxMacSelf-hosted+1

    brat offers configurable text annotation, collaboration and export tools as a free self-hosted project.

    7.5 Open source Visit site
  7. 7

    BasicAI

    Free plan APISelf-hostedWeb

    BasicAI supports several data types, team workflows and quality checks, with hosted and on-premise deployment options.

    7.4 Free plan · paid from $9/user/mo Visit site
  8. 8

    CVAT

    Free plan APISelf-hostedWeb

    CVAT combines varied annotation tools with review workflows, storage connections, and broad export options.

    7.4 Free plan · paid from $23/user/mo (annual) Visit site
  9. 9

    Intellisane Annotation Platform

    Free plan APIWeb

    Intellisane covers multiple annotation types and provides batch review, cloud-storage connections, and several export formats. The free plan has explicit project, member, annotation, and asset limits.

    7.1 Free plan Visit site
  10. 10

    Roboflow

    Free plan AndroidAPIiPhone+4

    Roboflow brings computer vision dataset work, inference, and deployment into one platform.

    7.1 Free plan · paid from $79/mo (annual) · 14-day trial Visit site
  11. 11

    LabelU

    Free plan APIMacSelf-hosted+2

    LabelU brings multimodal annotation, model-assisted labeling and several export formats into an open-source package.

    6.9 Open source Visit site
  12. 12

    Supervisely

    Free plan APISelf-hostedWeb

    Supervisely combines annotation, dataset management and model workflows, with options ranging from a limited free Community plan to custom Enterprise deployment.

    6.8 Free plan · paid from €199/mo · 30-day trial Visit site
  13. 13

    Labelbox

    Free plan APIWeb

    Choose Labelbox if you need AI training data services, reinforcement learning environments, or enterprise agent workflows connected to other apps.

    6.7 Free plan Visit site
  14. 14

    V7 Darwin

    Free plan APIWeb

    Choose V7 Darwin if your team needs to prepare varied datasets with model-assisted annotation, configurable review stages, and cloud or developer integrations.

    6.6 Free plan · pricing on request Visit site
  15. 15

    Kili Technology

    Free trial APISelf-hostedWeb

    Kili combines broad data support with configurable review and quality tools for AI dataset work. Trial limits and pricing on request are worth weighing against the team's intended scale.

    6.1 Pricing on request · 14-day trial Visit site
  16. 16

    Dataloop

    Paid APILinuxMac+2

    Choose Dataloop if you need an AI development platform that combines unstructured data, model workflows, pipelines and human feedback.

    5.9 Pricing on request Visit site
  17. 17

    Encord

    Paid APISelf-hostedWeb

    Encord combines multimodal annotation with dataset curation and model evaluation for AI development teams.

    5.6 Pricing on request Visit site
  18. 18

    Prodigy

    Paid APILinuxMac+3

    Prodigy combines broad annotation coverage with developer control over workflows, interfaces, storage, and deployment.

    5.5 From $390 Visit site
  19. 19

    SuperAnnotate

    Paid APIMacWeb+1

    Choose SuperAnnotate if your AI team needs annotation across multiple modalities, model-assisted workflows, and analytics for managing contributors and projects.

    5.4 Pricing on request Visit site
  20. 20

    MoniSa DataOps

    Paid

    Choose MoniSa DataOps if your team needs multilingual annotation and review planning with workflow controls tailored to each project.

    4.9 Pricing on request Visit site
  21. 21

    Amazon SageMaker Ground Truth

    Paid Web
    4.5 Visit site
  22. 22

    LabelLLM

    Paid Web
    4.1 Open source Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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