Langfuse vs promptfoo
Side-by-side comparison with live GitHub signals. Last updated May 26, 2026.
| Metric | Langfuse | promptfoo |
|---|---|---|
| GitHub Stars | 28.0K | 21.6K |
| Contributors | 157 | 286 |
| Last Commit | May 26, 2026 | May 26, 2026 |
| Open Issues | 641 | 312 |
| License | open-source | open-source |
| Pricing | freemium | open-source |
| Free Tier | Yes | Yes |
| Category | dev-tools | dev-tools |
| Trending | No | No |
Shared Tags
evaluationopen-source
Only in Langfuse
observabilitytracingprompt-managementanalytics
Only in promptfoo
testingred-teamingsecurityci-cd
About Langfuse
Langfuse is an open-source LLM engineering platform providing observability, analytics, and prompt management. Features distributed tracing for complex agent chains, evaluation scoring, prompt versioning and A/B testing, dataset management, and cost tracking. Integrates with LangChain, LlamaIndex, OpenAI SDK, and any LLM framework via OpenTelemetry.
View full listingAbout promptfoo
promptfoo is an open-source tool for testing, evaluating, and red-teaming LLM applications. Run automated evaluations across multiple models and prompts, compare outputs side-by-side, detect regressions, and test for security vulnerabilities. Supports custom assertions, CI/CD integration, and model-graded evaluations.
View full listing