head to head · open source
Langflow vs Structr
Langflow has 156,266 GitHub stars, 10,311 forks, 1,056 open issues and last shipped yesterday. Structr has 828 stars, 161 forks, 5 open issues and last shipped 22 days ago. Langflow leads on adoption by 18,773% (156,266 vs 828 stars). Langflow is written in Python under MIT; Structr is written in Java under a custom or non-standard licence. Langflow has attracted 7% as many forks as stars, Structr 19%. 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 | Structr | |
|---|---|---|
| GitHub stars | ★ 156K | ★ 828 |
| License | MIT | Custom / other |
| Written in | Python | Java |
| Last push | 2026-11-02 | 2026-10-12 |
| Forks | ⑂ 10K | ⑂ 161 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langflow if
- You weight community size — 156K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Structr if
- You want the Structr feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Java
- You evaluated both and Structr fits your workflow better
About Langflow
Langflow is a powerful platform for building and deploying AI powered agents and workflows. It provides developers with both a visual authoring experience and built in API and MCP servers that turn every workflow into a tool that can be integrated into applications built on any framework or stack. Langflow comes with batteries included and supports all major LLMs, vector databases and a growing library of AI tools. ✨ Highlight features Visual builder interface to quickly get started and iterate. Source code access lets you customize any component using Python. Interactive playground to immediately test and…
read the full Langflow overview →
About Structr
Structr brightgreen) purple) Overview Structr is an open source generic low code development and runtime platform built on graph technology. It is not limited to any predefined use case and supports the creation of fully custom applications — including web applications, graph database backed backends, data centric systems, middleware, and integration components. At its core, Structr uses a graph database to store both application components (schema, UI definitions, templates, scripts, workflows) and application/user data. This provides schema flexibility, fast graph traversals, and expressive data modeling…
read the full Structr overview →
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Frequently asked questions
Is Langflow or Structr more popular?
Langflow has 156,266 GitHub stars and Structr has 828. Langflow has the larger community by that measure.
Are Langflow and Structr free?
Both are open source. Langflow is licensed under MIT, and Structr has no licence declared in this registry. Both are free to self-host.
What is the difference between Langflow and Structr?
Langflow is written in Python and Structr in Java. 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 Structr?
Choose Langflow if you want the larger community (156,266 stars) or its MIT licence terms. Choose Structr if its feature set, stack or Custom / other licence fits better. Both are self-hostable.