Langfuse
Open-source platform for tracing, evaluating and monitoring LLM applications, sent from application code through SDKs and OpenTelemetry.
langfuse.comrepositorydocspricing
Langfuse is a platform for tracing, evaluating and improving LLM applications and agents. Applications send traces through native Python and JavaScript SDKs. Two application containers make up a self-hosted install: Langfuse Web serves the UI and APIs, and Langfuse Worker processes events asynchronously. The web component connects to PostgreSQL, Redis or Valkey, ClickHouse and S3 or blob storage. The self-hosting guide covers Docker Compose on one machine, a Helm chart for Kubernetes and a Terraform module for AWS.
Sign-in can use OAuth and SSO providers, each configured through environment variables.
Worth knowing
The core is MIT licensed. Some add-on features need an Enterprise license key, and the directory holding those parts carries its own Enterprise License. The hosted option, Langfuse Cloud, runs the same codebase as the self-hosted product.
Identity
Rendering and deploy
Releases
Adoption
Sources
- 2026-11-03: links, Categories
langfuse.com - 2026-11-03: links, Written in, GitHub stars, Contributors
github.com/langfuse/langfuse - 2026-11-03: links
langfuse.com/docs - 2026-11-03: First release, Current major version
github.com/langfuse/langfuse/releases - 2026-11-03: Maintainer
github.com/langfuse/langfuse/blob/v4.72.0/LICENSE - 2026-11-03: Runtime
github.com/langfuse/langfuse/blob/v4.72.0/package.json - 2026-11-03: License
langfuse.com/self-hosting/license-key - 2026-11-03: License
github.com/langfuse/langfuse/blob/v4.72.0/ee/LICENSE - 2026-11-03: Last release
github.com/langfuse/langfuse/releases/tag/v4.72.0 - 2026-11-03: Databases, Runs as
langfuse.com/self-hosting - 2026-11-03: Install with, Admin interface
langfuse.com/self-hosting/docker-compose - 2026-11-03: Install with
langfuse.com/self-hosting/kubernetes-helm - 2026-11-03: Install with
langfuse.com/self-hosting/deployment/aws - 2026-11-03: links
langfuse.com/pricing