Langfuse
Open-source LLM engineering platform for tracing, evals, prompt management, and observability of LLM apps and agents.
Last verified:
Langfuse is an open-source LLM observability and evaluation platform used to trace, debug, and improve LLM applications and agents in production. It offers a free self-hosted MIT-licensed core alongside multi-region (US/EU/Japan) cloud hosting, native OpenTelemetry ingestion, prompt management, and dataset/experiment tooling. Founded in Berlin in 2022 as part of YC W23, Langfuse was acquired by ClickHouse in January 2026 while remaining open-source and self-hostable.
Pricing
| Tier | Price | Key features |
|---|---|---|
| Hobby | $0/monthly | All platform features (with limits), Community support, 30-day data retention, No credit card required |
| Core | $29/monthly | Unlimited users, 90-day data retention, In-app support |
| Pro | $199/monthly | 3-year data retention, Unlimited annotation queues, High rate limits, SOC2/ISO27001 reports on request, HIPAA BAA available |
| Enterprise | $2499/monthly | Audit logs, SCIM API, Custom rate limits, Uptime/support SLA, Dedicated support engineer |
Source: https://langfuse.com/pricing
Agent-readiness
- Discoverability
- 85/100
- Machine-readable content
- 90/100
- Programmatic access
- 95/100
- MCP / agent support
- 85/100
- Self-serve transactability
- 80/100
- Transparency
- 75/100
Security & compliance
- SSO / SAML
- Yes
- Encryption at rest
- Yes
- Encryption in transit
- Yes
- Audit log
- Yes
- Pentest report
- Not publicly documented
"Not publicly documented" means Crail found no public evidence either way — not a confirmed absence. See our methodology. Trust center: https://langfuse.com/security.
FAQ
Does Langfuse have a free tier?
Yes, Langfuse offers a free tier or free trial.
Can you buy Langfuse without talking to sales?
Yes, Langfuse can be purchased self-serve without a sales call.
Does Langfuse have an official MCP (Model Context Protocol) server?
Yes, Langfuse publishes an official MCP server (https://github.com/langfuse/mcp-server-langfuse).
What compliance certifications does Langfuse hold?
Langfuse holds: SOC 2 Type II, ISO 27001, GDPR, HIPAA (BAA available).
What people are saying on Reddit & Hacker News
Real, publicly-posted discussion — not a Crail-verified review. Always linked back to the original post so you can read it in context.
“I love langfuse, it is my goto.”
View original post →
“I personally migrated away from it to use Sentry, their software was honestly not that great.”
View original post →
“Bunch of them : Langsmith, Lunary, Phoenix Arize, Portkey, Datadog and Helicone.”
View original post →
Reviews
No reviews yet for Langfuse. Be the first to submit a verified review.
Methodology & disclosure
Data verified via agent crawled, last checked 2026-07-26. Agent-readiness methodology version crail-ar-v0.1. No vendor payment influences these scores — see our methodology page.