label-studio
Label Studio annotation tool
Decision gist · record as of 2026-08-14
Yes, if you need a self-hosted, open-source annotation platform. Label Studio is actively maintained with no known vulnerabilities and supports multiple data types and export formats. The Apache-2.0 license is permissive. Install friction is low, but deployment requires managing 58 dependencies and typically running it as a service (Docker or local server) rather than embedding it in a Python script. Best suited for teams annotating datasets at scale or organizations with data privacy constraints.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python >=3.10.
- Launches a web server at http://localhost:8080; you access the annotation UI through a browser, not via direct Python imports.
- Low friction install as a pure Python wheel.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows commercial and private use with minimal restrictions. You may use, modify, and distribute Label Studio freely provided you include the license notice and state significant changes.
last release 2026-03-13 (154 days) · last repo commit 2026-08-14 · 28,060 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 113,849 downloads/mo, #12,326 on PyPI
Alternatives
Verify before relying
pip install label-studio
label-studio- Whether the 58 runtime dependencies can be cleanly installed together on all supported platforms without version conflicts.
- Performance characteristics and scalability limits for concurrent annotators or large datasets.
- Whether pre-labeling with ML models requires additional setup beyond the base install.
- Actual GitHub stars and monthly download volume to assess community adoption.
What it is and what it does
Label Studio is a Django-based web application that provides a browser-accessible interface for annotating raw data across multiple media types—images, audio, text, video, and time series. You run it as a standalone server (via the `label-studio` command or Docker), create projects, upload or connect to cloud storage (S3, GCS, Azure Blob), and invite team members to label data through a customizable UI. Annotations are stored in a database (SQLite by default, PostgreSQL for production) and can be exported in formats compatible with common ML frameworks.
The package is built on Django and Django REST Framework, with integrations for cloud storage (boto3, azure-storage-blob, google-cloud-logging) and optional machine learning model integration for pre-labeling. It is designed as a self-hosted or cloud-deployed service rather than a library you import into your own code; you install it, start the server, and interact via the web UI or REST API. The 58 runtime dependencies reflect this architecture—most are Django middleware and utilities for authentication, CORS, CSP, file serving, and job queuing.
Use it for
- Prepare raw image, text, or audio datasets for supervised learning by labeling examples through a team-accessible web interface.
- Improve existing training datasets by reviewing and correcting model predictions displayed side-by-side with raw data.
- Integrate data labeling into a ML pipeline via the REST API, triggering exports to training-ready formats after annotation.
- Run a self-hosted annotation service for sensitive data that cannot be sent to third-party SaaS platforms.
- Customize labeling workflows for domain-specific tasks using Label Studio's configuration language and template system.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need a self-hosted, open-source annotation platform.
Label Studio is actively maintained with no known vulnerabilities and supports multiple data types and export formats. The Apache-2.0 license is permissive. Install friction is low, but deployment requires managing 58 dependencies and typically running it as a service (Docker or local server) rather than embedding it in a Python script. Best suited for teams annotating datasets at scale or organizations with data privacy constraints.
Install
label-studio on PyPI
Before you install
Low friction install as a pure Python wheel. Active maintenance with recent releases; established community use indicated by repository activity. Requires Python >=3.10 and brings in 58 runtime dependencies, mostly Django ecosystem packages and cloud storage clients (boto3, azure-storage-blob, google-cloud-logging), which add deployment complexity.
Requires Python >=3.10. Launches a web server at http://localhost:8080; you access the annotation UI through a browser, not via direct Python imports.
License in practice
Apache-2.0 permissive license allows commercial and private use with minimal restrictions. You may use, modify, and distribute Label Studio freely provided you include the license notice and state significant changes.
Quickstart
pip install label-studio
label-studioVerify before relying
- Whether the 58 runtime dependencies can be cleanly installed together on all supported platforms without version conflicts.
- Performance characteristics and scalability limits for concurrent annotators or large datasets.
- Whether pre-labeling with ML models requires additional setup beyond the base install.
- Actual GitHub stars and monthly download volume to assess community adoption.
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release <4,>=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 58 packagesDjangoappdirsattrattrsazure-storage-blobbleachboto3botocorecoloramacryptographydefusedxmldjango-annoyingdjango-cors-headersdjango-cspdjango-debug-toolbardjango-environdjango-extensionsdjango-filterdjango-migration-linterdjango-ranged-fileresponsedjango-rqdjango-storagesdjango-user-agentsdjangorestframeworkdjangorestframework-simplejwtdrf-dynamic-fieldsdrf-flex-fieldsdrf-generatorsdrf-spectaculargoogle-cloud-logging |
| Maintenance | Actively maintained 154 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 113,849 / month, #12,326 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: Apache Software LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 |
Evidence: label_studio-1.23.0-py3-none-any.whl
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See also label-studio-sdk · labelbox · argilla · surge-api · supervisely · dtlpymetrics · connected-components-3d · cleanlab · pystac-ext-label · lbox-clients