head to head · open source
Langflow vs PenguLoader
Langflow has 156,266 GitHub stars, 10,311 forks, 1,056 open issues and last shipped yesterday. PenguLoader has 755 stars, 85 forks, 5 open issues and last shipped 3 months ago. Langflow leads on adoption by 20,597% (156,266 vs 755 stars). Langflow is written in Python under MIT; PenguLoader is written in C++ under MIT. Langflow has attracted 7% as many forks as stars, PenguLoader 11%. 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 | PenguLoader | |
|---|---|---|
| GitHub stars | ★ 156K | ★ 755 |
| License | MIT | MIT |
| Written in | Python | C++ |
| Last push | 2026-11-02 | 2026-08-10 |
| Forks | ⑂ 10K | ⑂ 85 |
| 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 PenguLoader if
- You want the PenguLoader feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C++
- You evaluated both and PenguLoader 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 PenguLoader
Pengu Loader ✨ The ultimate JavaScript plugin loader, build your unmatched LoL Client. About Pengu Loader — formerly League Loader — is a powerful plugin loader tailored for the League of Legends Client , enabling limitless customization and personalization. With Pengu Loader, you can seamlessly load JavaScript plugins directly into the Client, allowing you to transform its appearance, add unique features, and integrate custom content to enhance your overall experience. Features Plugin support to customize the League Client Personalize & theme with flexible web stacks Modern JavaScript compatibility Built in…
read the full PenguLoader overview →
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Frequently asked questions
Is Langflow or PenguLoader more popular?
Langflow has 156,266 GitHub stars and PenguLoader has 755. Langflow has the larger community by that measure.
Are Langflow and PenguLoader free?
Both are open source. Langflow is licensed under MIT and PenguLoader under MIT. Neither carries a licence fee.
What is the difference between Langflow and PenguLoader?
Langflow is written in Python and PenguLoader in C++. 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 PenguLoader?
Choose Langflow if you want the larger community (156,266 stars) or its MIT licence terms. Choose PenguLoader if its feature set, stack or MIT licence fits better. Both are self-hostable.