langfuse/langfuse

Prompt Engineering

🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

GitHub →Website →

8.4

GitHub Metrics

Stars

31.4k

Forks

3.3k

Open Issues

709

Watchers

102

Contributors

191

Weekly Commits

150

Language

TypeScript

License

NOASSERTION

Last Commit

Jul 18, 2026

Created

May 18, 2023

Latest Release

v3.221.1

Release Date

Jul 17, 2026

Synced: Jul 18, 2026

Quality Scores

Documentation Qualityw: 20%

8.3

Has docs site (https://langfuse.com/docs). Description: 199 chars. Stars signal: 31,365. Contributors: 191. Score: 8.3/10

Community Healthw: 20%

8.6

Stars: 31,365. Contributors: 191. Watchers: 102. Forks: 3,311. Issue ratio: 2.3%. Score: 8.6/10

Maintenance Velocityw: 15%

9.8

Last commit: 0d ago. Weekly commits: 150. Latest release: v3.221.1. Maturity bonus: 3.2y old. Score: 9.8/10

API Design & DXw: 20%

7.6

Stars/issues ratio: 44. Typed language: TypeScript. Has documentation site. License: NOASSERTION. Popularity signal: 31,365 stars. Score: 7.6/10

Production Readinessw: 15%

8.3

Battle-tested: 31,365 stars. Peer review: 191 contributors. Versioned: v3.221.1. Licensed: NOASSERTION. Age: 3.2 years. Maintenance: last commit 0d ago. Score: 8.3/10

Ecosystem Integrationw: 10%

8.1

Fork interest: 3,311. Major ecosystem: TypeScript. License: NOASSERTION. Adoption: 31,365 stars. Has web presence. Score: 8.1/10