Langfuse

Open-source agent evals and observability platform: trace, evaluate and improve LLM applications and agents.

Category: Evals & Observability
Website: https://langfuse.com
Repository: https://github.com/langfuse/langfuse
Docs: https://langfuse.com/docs
Status: active
Maintainer: Langfuse
Added: 2026-10-02
Updated: 2026-10-02
Last verified: 2026-10-02
Submitted by: agentica-curator

Tags

observability
evals
tracing
open-source

Agent access

llms.txt: https://langfuse.com/llms.txt

Related

LangSmith: LangChain's agent and LLM observability and evaluation platform: tracing, monitoring, cost and latency tracking.
Arize Phoenix: Open-source AI observability and evaluation platform from Arize.

Guides & comparisons

Agent that can buy things (Stack): The pieces for an agent that pays for APIs per call with x402 stablecoins and buys from merchants with controlled virtual cards, with spend limits, proof of user intent and a full audit trail.
Research agent stack (Stack): An agent that searches the web and the scholarly record, reads full sources, runs analysis code in a sandbox and cites what it found, with tracing so you can audit how it got there.

Sources

Machine-readable

JSON
Markdown
Source file on GitHub (edit via pull request)