head to head · open source
Langflow vs Onlook
Langflow has 154,943 GitHub stars, 10,108 forks, 1,056 open issues and last shipped yesterday. Onlook has 26,752 stars, 2,101 forks, 380 open issues and last shipped 24 days ago. Langflow leads on adoption by 479% (154,943 vs 26,752 stars). Langflow is written in Python under MIT; Onlook is written in TypeScript under Apache-2.0. Langflow has attracted 7% as many forks as stars, Onlook 8%. Langflow was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Langflow | Onlook | |
|---|---|---|
| GitHub stars | ★ 155K | ★ 27K |
| License | MIT | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-08-25 |
| Forks | ⑂ 10K | ⑂ 2.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langflow if
- You weight community size — 155K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Onlook if
- You want the Onlook feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and Onlook fits your workflow better
About Langflow
Langflow is a visual builder platform for designing, testing, and deploying AI agents and retrieval augmented generation (RAG) pipelines. It lives in the Python based generative AI ecosystem and targets developers building intelligent applications. The project provides a low code interface to assemble components—such as LLMs, vector stores, memory modules, and tools—into executable workflows, while also exposing those workflows as APIs or MCP servers for integration into external applications.
read the full Langflow overview →
About Onlook
Onlook is an open source, Apache 2.0 visual editor for Next.js and TailwindCSS projects that lets designers and developers edit a running React app in the browser while the underlying code changes in real time.
read the full Onlook overview →
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Frequently asked questions
Is Langflow or Onlook more popular?
Langflow has 154,943 GitHub stars and Onlook has 26,752. Langflow has the larger community by that measure.
Are Langflow and Onlook free?
Both are open source. Langflow is licensed under MIT and Onlook under Apache-2.0. Neither carries a licence fee.
What is the difference between Langflow and Onlook?
Langflow is written in Python and Onlook in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Langflow or Onlook?
Choose Langflow if you want the larger community (154,943 stars) or its MIT licence terms. Choose Onlook if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.