Why Langfuse?

Open Source

• Langfuse is open source.
• You can self-host it.
• Langfuse's core tracing is MIT licensed and will always be freely available.
• We are transparent about what we are building and how.
• We iterate with our users (opens in a new tab) and celebrate their feedback.

Developer First

• Langfuse is built for developers.
• We are creating a technical product with great developer experience.
• Langfuse is powerful yet simple, allowing you to build custom logic on top of it.

Built for Complex Use Cases

• We designed Langfuse with complex, nested LLM calls in mind.
• Langfuse enables hierarchical representations of your application in traces.
• We go beyond Input/Output to include all the context of your app.

No Lock-In

• We are building Langfuse to be a core part of your stack.
• Langfuse has open APIs (opens in a new tab) to integrate with your infrastructure.
• Langfuse is model and framework agnostic, aiming for interoperability of our integrations.

Comprehensive Feature Set

• We are building the core development tool you need to build robust LLM applications – more on this here.
• Tracing lies at our core. If a feature integrates well with traces, we will build it.

Security and Compliance

• We take security and compliance seriously.
• Privacy: You can choose to host in the EU or the US. We are GDPR compliant.
• Security: Langfuse Cloud is ISO 27001 and SOC 2 Type 2 certified.
• More details in our Security and Privacy Center.