Label Studio
AI Data & Human Feedback · Free
Open-source data labeling platform for all data types
At a glance
- Made by
- HumanSignal
- Korean
- None (English and a few others only)
- API
- Yes
- Available on
- Web, API
- Open source
- Open source (license name not listed on the page)
- GitHub
- 28,462 stars · Apache-2.0
What is Label Studio?
Label Studio is an open-source tool for labeling all types of data, including audio, text, images, video, and time series. You label with a simple UI and then export to multiple model formats to prepare or improve training data. It also supports AI evaluation tasks such as LLM and agent evaluation, RLHF, and RAG evaluation. It connects to ML pipelines via API, Python SDK, and webhooks, and you can install it with pip, Brew, or Docker, or try Starter Cloud for free.
- Image object detection (boxes, polygons, circles, keypoints)
- NLP and document labeling such as named entity recognition
- Speech transcription and speaker diarization
- Time series event labeling
- Collecting human preferences, corrections, and rankings for RLHF
- Custom benchmarks, rubrics, and side-by-side comparison for LLM evaluation
- Custom layouts and templates tailored to your data and tasks
- API, Python SDK, and webhook integration
Who uses Label Studio and for what
- ML teams preparing raw data or improving training data quality
- Evaluating LLM and agent outputs and collecting RLHF data
- Evaluating RAG search relevance and answers
Pricing
What you get for free — Yes (free install of the open-source Community Edition, free trial of Starter Cloud)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.
AI tools similar to Label Studio (alternatives)
Label Studio vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| Label Studio | Free | 0 | 3 | Yes | — | No |
| Prodigy | Free + paid | 0 | 3 | No | — | No |
| Scale AI | Free + paid | 0 | 3 | — | — | No |
1 of these 3 tools have a free plan.
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
Label Studio on AI Galaxy Map
- One of 8 AI tools in the AI Data & Human Feedback field.
- Connected to 3 other tools — #1 in its field.
Frequently asked questions
Can I use Label Studio for free?
Yes (free install of the open-source Community Edition, free trial of Starter Cloud). Prices can change, so check the official site before paying.
What AI can I use instead of Label Studio?
Tools that do the same job, such as Prodigy, Scale AI, Labelbox, are connected to it on the map.
Can I use Label Studio in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.