Langfuse

Langfuse is an open-source LLM engineering platform designed to help developers track, monitor, and improve AI-based applications. It provides tools for tracing complex LLM calls, managing prompts, and evaluating output quality through both automated and human-in-the-loop workflows.

Brand Authority Index (BAI): 68/100

Archetype: Challenger

Category: Software Development Tools

Part of: Y Combinator

https://optimly.ai/brand/langfuse

Last analyzed: April 11, 2026