Langfuse
FeaturedFree tierTrace LLM calls, prompts, and evals so you can see what the agent actually did
Best for llm · observability · prompts
Strengths
- LLM traces
- Prompt versions
Skip if
you need a team plan, audit logs, or a phone number to call
Langfuse is observability for LLM apps. Log traces, compare prompts, and score outputs — an inspect desk for agents, not a guess from the server log.
Key features
- LLM traces
- Prompt versions
- Evals and scores
- Self-host or cloud
Why it is on Toolora
We list Langfuse for people who need llm · observability · prompts. Skip it if you need a team plan, audit logs, or a phone number to call.
Closest alternatives on Toolora: Braintrust, Helicone, OpenRouter.
Try instead
CompareBraintrust
Observability and evals for shipping quality AI agents at scale
AI ToolsAlso built for llm.
Helicone
AI gateway and observability to route, debug, and analyze LLM apps
AI ToolsAlso built for llm.
More polished / supported, if you will pay.
Langfuse
Free