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Best Active Learning Tools in 2026

Active learning tools organize work around query strategies, human annotation, supported data types, and model frameworks. This list also covers deployment options and platforms such as Linux, macOS, Windows, web, APIs, and self-hosting.

• 16 apps
• Research read 28 Sept 2026
• How the order is worked out

1. 1 L

   LightlyStudio

   Free plan Open source APILinuxMac+3

   LightlyStudio brings dataset curation, annotation, evaluation, and management together, with both GUI and Python API workflows. The open-source plan omits customer support and team collaboration.

   8.8 Free plan Visit site
2. 2 A

   Active Learning Toolbox

   Free plan LinuxMacSelf-hosted+1
   7.7 Free plan Visit site
3. 3 B

   Baal

   Free plan LinuxMacSelf-hosted+1
   7.2 Free plan Visit site
4. 4 A

   ALEF

   Free plan Linux
   7.1 Free plan Visit site
5. 5

   Potato

   Free plan APILinuxMac+3

   Potato offers broad annotation and AI-assisted labeling options in a free, self-hosted package. It is a fit for users prepared to run and maintain it themselves; there is no managed cloud tier.

   7.0 Free plan Visit site
6. 6 C

   Cardinal

   Free plan LinuxMacWindows
   6.2 Free plan Visit site
7. 7 L

   Label Sleuth

   Free plan LinuxMacWeb+1
   6.2 Free plan Visit site
8. 8 L

   libact

   Free plan LinuxMacWindows
   6.0 Free plan Visit site
9. 9 M

   modAL

   Free plan LinuxMacWindows
   5.9 Free plan Visit site
10. 10 P

    Prodigy

    Free trial APILinuxMac+3

    Prodigy offers a broad set of annotation workflows and local data handling options for machine learning projects.

    5.9 Visit site
11. 11

    Dataloop

    Paid APILinuxMac+2

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

    5.8 Pricing on request Visit site
12. 12 A

    ActiveTigger

    Paid APISelf-hostedWeb
    5.6 Open source Visit site
13. 13 A

    ALToolbox

    Paid LinuxMacSelf-hosted+1
    5.6 Open source Visit site
14. 14

    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
15. 15 O

    Orobix Active Learning

    Free plan
    5.5 Free plan Visit site
16. 16 S

    small-text

    Free plan
    5.2 Free plan 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

For a budget choice, compare free plans, free trials, and paid-from details. If you need to read or change code, check the open-source licence. Confirm that the tool's data types, model framework, annotation workflow, and deployment option match your project.

Questions

Do active learning tools have free plans?

Free plans are offered in this category. Check the plan details for the tool you are considering.

Are any of these tools open source?

Open-source code is available in this category. Check the licence before reading, changing, or redistributing code.

Can I try a tool before paying?

A free trial is available from items in this category. Trial terms can differ, so check the listing and provider terms.

Which platforms are supported?

The listings cover Linux, macOS, Windows, web, API, and self-hosted deployments. Check the platform for the tool you want.

Which details matter when comparing tools?

Review free plan, paid from, query strategies, human annotation workflow, supported data types, model frameworks, and deployment options.

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