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FossfitsOpen-source AI that fits your machine© 2026

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Langfuse

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Langfuse

Traces, prompts, and evals for LLM apps.

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Fit.

Catalog snapshot

Platforms: Linux, Web, Docker
Operating systems: Linux, Web
Ram floor: 4 GB
Gpu: Not needed
Docker: Yes
Setup: Intermediate
Deploy as: Self-hosted, Cloud
Commercial use: Allowed

MIT core. Cloud is optional.

Project.

Fetched Sep 12, 2026¹

License: MIT
Stars: 34.5k¹
Forks: 3.8k¹
Open issues: 305¹
Language: TypeScript¹
Last commit: Sep 12, 2026¹
Latest release: Aug 26, 2026
Tags: observabilitypromptsevals

About.

Langfuse is observability for generations. Self-host with Docker. Pair it with whatever model you already call.

traces · sessions · datasets · scores

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