Vendors / Langfuse
Langfuse
Named in 48 of 50 AI answers across 1 category in September 2026. Best position: LLM observability and evals, 96% answer share, ranked #2, named first in 50%.
96%
Best share LLM observability and evals
What Langfuse is
Langfuse is an open platform for tracing, evaluating and improving AI agents. It is for people developing LLM applications, including product managers, domain experts and engineers. A free account is available.
It uses production data to help users understand agent behaviour. Langfuse provides central storage, versioning and retrieval for prompts used in LLM applications. Non-technical team members can update prompts through the interface, while applications fetch the latest version. Its SDK also caches prompts on the client side.
By category
First edition
| Category | Rank | Answer share | Named first | Models | Δ |
|---|---|---|---|---|---|
| LLM observability and evalsAI infra | #2 of 13 | 50% | GPT-5.6 Sol, ChatGPT, GPT-5.6 Luna, Claude Opus 5, Claude, Claude Fable 5, Gemini, Gemini 3.5 Flash, Perplexity, Sonar Reasoning Pro | new |
What the models said
“Practical recommendation If you have no strong existing constraints, start with Langfuse self-hosted, instrumented via OpenTelemetry.”
“Go with Langfuse if you want a powerful, clean, self-hostable open-source tracing and cost-monitoring UI.”
“Summary Recommendation Go with Langfuse or Comet Opik if you want an open-source, self-hostable platform with full control over your telemetry data.”
“Bottom line: use Langfuse as the default procurement choice; use Phoenix if open telemetry, self-hosting, and diagnostic depth are your strongest requirements.”
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