Langfuse
Langfuse, part of ClickHouse, Inc. · langfuse.com · Last checked:
- Open-source core (MIT)
- Hosted SaaS platform (Langfuse Cloud)
- Self-hosted (free OSS or Enterprise)
Company status
Active. ClickHouse acquired Langfuse (announced January 16, 2026) and owns 100% of it; Langfuse Cloud keeps running and the core stays MIT-licensed and self-hostable.
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Capabilities
- Tracing of LLM apps and agents, sessions, users, token and cost tracking; OpenTelemetry
- Online evals on live production traces and offline evaluation with datasets and experiments; LLM-as-a-judge, scores, annotation queues
- Prompt management
- Cloud data regions in the US, EU, Japan, and a HIPAA region
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Who it tends to fit
- Teams that want to self-host all core features for free
- Teams that want a hosted plan with published unit pricing
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Pricing
Hobby: free (50k units/month). Core: $29/month (100k units/month, then $8 per 100k units). Pro: $199/month (100k units/month, then $8 per 100k units). Enterprise: $2,499/month. Optional Teams add-on: $300/month. Self-hosted open source: free (MIT); self-hosted Enterprise: custom pricing.
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Published certifications
Listed as stated by the vendor. Scope can differ by product or subsidiary; request current reports.
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Limitations to check
- Code in the repository ee/ directories is under a separate license; core features are MIT (per the repository LICENSE)
- Ownership changed in January 2026; review contracting entity in diligence
Sources 1, 2, 3, 4, 5, 6 · checked 2026-11-08
Sources
- Hobby, Core, Pro, Enterprise prices, included units, overage, Teams add-onlangfuse.com/pricingChecked 2026-11-08
- Self-hosted open source is free under MIT; Enterprise self-hosted is custom pricedlangfuse.com/pricing-self-hostChecked 2026-11-08
- Annual SOC 2 Type 2 and ISO 27001 audits, HIPAA-ready region, GDPR; data regions US, EU, Japan, HIPAAlangfuse.com/securityChecked 2026-11-08
- Repository LICENSE: MIT outside ee/ directories; copyright ClickHouse, Inc.github.com/langfuse/langfuseChecked 2026-11-08
- ClickHouse has acquired Langfuse; stays open source and self-hostable; Cloud runs as-islangfuse.com/blog/announcing-acquisitionChecked 2026-11-08
- Evaluation runs online on production traces and offline with datasets and experiments; LLM-as-judgelangfuse.com/docs/evaluation/overviewChecked 2026-11-08
Report a correction: [email protected]. Facts are re-checked at least every 90 days.