Free Explore tier with no card required; Basic at C$9.99/month (C$4.99 first month); Pro and Premium tiers with higher AI usage and premium features. 7-day free trial available.
Key features
Hierarchical traces capture every LLM call, tool invocation, and retrieval step
LLM-as-a-judge, heuristic functions, or human review evaluations
Prompt management with one-click deployments and rollbacks
Playground to test prompts on real production inputs and compare models
Experiments with test cases and side-by-side comparison
Human annotation and collaborative human-in-the-loop workflows
Cost and latency monitoring with dashboards and alerts
REST APIs and Query SDK for data access
Langfuse Assistant to automate the AI engineering loop
25 specialised AI copilots
Daily briefings personalised to your information
Unified AI memory across all conversations
Integration with Google Workspace and Microsoft 365
Live connections to Notion and GitHub
Voice interface
What makes it different
MIT licensed open source platform with no data lock-in
Enterprise scale architecture handling billions of monthly events
Works with any language and framework with no framework lock-in
Async by default so tracing never blocks your application
One connected AI brain across all five life areas instead of separate tools
Specialised copilots with shared context rather than one generic chat window
Personalised daily briefings built from your own connected data