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Reviewed · Updated 2026-06-16

Langfuse

Platform for monitoring, analyzing, and debugging AI-driven workflows and applications.

Reviewed by the Conversion Gems editorial team ·
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Pricing
Freemium
Best for
Developers
Category
AI Development
The bottom line

Best-value LLM observability for teams; self-host free minus infra or Cloud from $29/mo.

8.4
Our score
8.4 / 10
Conversion Gems editorial verdict
Free (50K units/mo); Core $29/mo
Features9/10
9 - traces, evals, prompts, scores and analytics.
Value9/10
9 - generous free tier; unlimited users on Core.
Ease of use7/10
7 - instrumentation required but good SDKs.
Ecosystem9/10
9 - LangChain, OTel, LiteLLM, active OSS community.
Support7/10
7 - community plus paid tier SLAs.
What it really is

Langfuse - open-source LLM engineering platform for tracing, evals, prompt management and production analytics.

Our take

OSS (MIT) self-hostable or Langfuse Cloud. Hobby free: 50K units/mo. Core $29/mo (100K units). Pro $199/mo (compliance, 3yr retention). Enterprise $2,499/mo. Overage ~$8/100K units graduated down. Unlimited users on paid cloud tiers.

Best for
AI teams wanting OSS observability with cloud option
Startups tracking agent traces and eval experiments
Cost-conscious teams vs per-seat LangSmith pricing
Not good for
Non-LLM infrastructure monitoring
Teams unwilling to run ClickHouse for self-host
Casual users with zero tracing needs
Friction report
Time to value
Moderate: SDK/OTel instrumentation setup.
Scale breakpoint
Overage costs at millions of units; self-host ops burden.
Walled garden
Low: OSS, data export, self-host portable.

Frequently Asked Questions

Alternatives

Step up

Langfuse Enterprise for custom volume and dedicated support.

Lighter alternative

Helicone or provider dashboards for basic logging.

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Tags

#LLMOps#LLMObservability#ModelEvaluation

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