head to head · open source
Langflow vs rea
Langflow has 155,402 GitHub stars, 10,189 forks, 1,056 open issues and last shipped yesterday. rea has 29,472 stars, 3,500 forks, 70 open issues and last shipped today. Langflow leads on adoption by 427% (155,402 vs 29,472 stars). Langflow is written in Python under MIT; rea is written in TypeScript under MIT. Langflow has attracted 7% as many forks as stars, rea 12%. rea 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 | rea | |
|---|---|---|
| GitHub stars | ★ 155K | ★ 29K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-10-08 | 2026-10-09 |
| Forks | ⑂ 10K | ⑂ 3.5K |
| 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 rea if
- You want the rea feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and rea 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 rea
REA is an open source MCP server and CLI that lets AI coding agents — and your terminal — reverse engineer native binaries, JavaScript and Electron apps, .NET assemblies, and websites, with evidence attached to every conclusion.
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Frequently asked questions
Is Langflow or rea more popular?
Langflow has 155,402 GitHub stars and rea has 29,472. Langflow has the larger community by that measure.
Are Langflow and rea free?
Both are open source. Langflow is licensed under MIT and rea under MIT. Neither carries a licence fee.
What is the difference between Langflow and rea?
Langflow is written in Python and rea 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 rea?
Choose Langflow if you want the larger community (155,402 stars) or its MIT licence terms. Choose rea if its feature set, stack or MIT licence fits better. Both are self-hostable.