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Llangfuse
🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
Popularity
Repository stars83536,896Highest
7-day net stars——
Fork564,146Highest
30-day trendInsufficient historyInsufficient history
Maintenance
Last push2026-11-022026-11-02
Maintenance notesNot verifiedNot verified
Repository created2026-01-222023-05-18
License & use
LicenseAGPL-3.0 · Share derivative sourceLicense not declared
PricingPricing not verifiedPricing not verified
Basics
Browse by purposeObservability · Self-hosted servicesModel and data evaluation · Observability · Self-hosted services
TypeApps & systemsApps & systems
SubcategoryOperationsOperations
PlatformNot verifiedNot verified
Cost detailsCheck current official software, hosting, model and infrastructure pricing.Check current official software, hosting, model and infrastructure pricing.
Pricing source——
First collected2026-11-032026-11-03
MetricRepository stars, not unique users or individual-skill installsRepository stars, not unique users or individual-skill installs
LanguageRustTypeScript
About this projectUltra-lightweight error tracking server compatible with Sentry SDKs🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
Measured at2026-11-03 08:23 UTC2026-11-02 18:59 UTC
License tiers are derived from metadata. Check obligations for your use; unknown does not mean prohibited. Ranked by repository stars, one position per repository. Stars and forks are not user counts.