head to head · open source
Langflow vs OpnForm
Langflow has 154,943 GitHub stars, 10,108 forks, 1,056 open issues and last shipped yesterday. OpnForm has 3,711 stars, 543 forks, 22 open issues and last shipped 3 days ago. Langflow leads on adoption by 4,075% (154,943 vs 3,711 stars). Langflow is written in Python under MIT; OpnForm is written in PHP under a custom or non-standard licence. Langflow has attracted 7% as many forks as stars, OpnForm 15%. 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 | OpnForm | |
|---|---|---|
| GitHub stars | ★ 155K | ★ 3.7K |
| License | MIT | Custom / other |
| Written in | Python | PHP |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 10K | ⑂ 543 |
| 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 OpnForm if
- You want the OpnForm feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches PHP
- You evaluated both and OpnForm 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 OpnForm
OpnForm is an open source form builder for the PHP, Laravel, and Nuxt ecosystem. It gives users a no code interface for creating forms, collecting submissions, and connecting form data to common team and automation tools. The core application is licensed under AGPLv3, while enterprise features under api/app/Enterprise use a proprietary license.
read the full OpnForm overview →
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Frequently asked questions
Is Langflow or OpnForm more popular?
Langflow has 154,943 GitHub stars and OpnForm has 3,711. Langflow has the larger community by that measure.
Are Langflow and OpnForm free?
Both are open source. Langflow is licensed under MIT, and OpnForm has no licence declared in this registry. Both are free to self-host.
What is the difference between Langflow and OpnForm?
Langflow is written in Python and OpnForm in PHP. 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 OpnForm?
Choose Langflow if you want the larger community (154,943 stars) or its MIT licence terms. Choose OpnForm if its feature set, stack or Custom / other licence fits better. Both are self-hostable.