Langfuse
Open-source LLM observability and evals — Hobby tier free, $29/mo Core, self-hostable
Overall score
About
Langfuse is an open-source observability and evaluation platform for LLM applications — tracing, prompt management, datasets, and evals in one product. Strong default for teams already using LangGraph (built by overlapping ecosystem). Pricing is tier-based with a free Hobby tier for POCs, $29/mo Core for production, and Pro/Enterprise tiers that unlock SOC 2, HIPAA, and SLAs.
Best for: Teams building production LLM apps that want observability + evals + prompt management in one product. Pairs naturally with LangGraph users. Self-hosting is a real option — the OSS edition is fully featured.
Pricing
| Tier | Monthly | Annual /mo | Billing | Notes |
|---|---|---|---|---|
| Hobby | Free | Free | flat | 50K units/mo;30 days data access;2 users;Community support;No credit card required · Free forever. Great for POCs and side projects. |
| Core | $29 | $29 | flat | 100K units/mo included;90 days data access;Unlimited users;In-app support;Volume discounts for startups and OSS · Best fit for most production apps that don't need SOC 2. |
| Pro | $199 | $199 | flat | 100K units/mo included;3 years data access;Unlimited annotation queues;SOC 2 Type II + ISO 27001 reports;BAA available for HIPAA;Optional Teams add-on at $300/mo · Compliance gate — SOC 2 and HIPAA become available here. |
| Enterprise | $2499 | $2499 | flat | Everything in Pro plus Teams;Audit logs;SCIM API;Custom rate limits;SLAs;Dedicated support · $2,499/mo starting. Contact sales for custom commitments. |
Key features
- Tracing, evals, prompt management, datasets in one product
- Open-source and self-hostable for free
- Hobby tier free for 50K units/mo
- $29/mo Core for 100K units, 90 days data, unlimited users
- GDPR DPA available across all tiers
- SOC 2 Type II and ISO 27001 on Pro+
- HIPAA BAA on Pro+
- Native LangChain, LangGraph, LlamaIndex, Vercel AI SDK integrations
Integrations
Trust & compliance
- Stage range
- —
- Founded
- —
- Status
- active
- SOC 2
- enterprise_only
- GDPR
- yes
- Data residency
- unknown
- External rating
- —
- Last verified
- May 2026
Reviews
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