head to head · open source
Langflow vs bb
Langflow has 155,275 GitHub stars, 10,149 forks, 1,056 open issues and last shipped yesterday. bb has 3,946 stars, 553 forks, 463 open issues and last shipped yesterday. Langflow leads on adoption by 3,835% (155,275 vs 3,946 stars). Langflow is written in Python under MIT; bb is written in TypeScript under MIT. Langflow has attracted 7% as many forks as stars, bb 14%. bb 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 | bb | |
|---|---|---|
| GitHub stars | ★ 155K | ★ 3.9K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-26 | 2026-09-26 |
| Forks | ⑂ 10K | ⑂ 553 |
| 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 bb if
- You want the bb feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and bb 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 bb
bb is the agent IDE that builds itself: an MIT licensed TypeScript application that lets developers drive coding agents from a desktop app, a web app, a CLI, or an HTTP API, and extend the tool itself while it runs.
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Frequently asked questions
Is Langflow or bb more popular?
Langflow has 155,275 GitHub stars and bb has 3,946. Langflow has the larger community by that measure.
Are Langflow and bb free?
Both are open source. Langflow is licensed under MIT and bb under MIT. Neither carries a licence fee.
What is the difference between Langflow and bb?
Langflow is written in Python and bb 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 bb?
Choose Langflow if you want the larger community (155,275 stars) or its MIT licence terms. Choose bb if its feature set, stack or MIT licence fits better. Both are self-hostable.