Langfuse (Finto Technologies GmbH)
Langfuse is an open-source platform that provides observability, evaluation, prompt management, and analytics for LLM applications and agents.
About
Langfuse, developed by Finto Technologies GmbH, is an open-source LLM engineering platform that helps teams build, monitor, debug, evaluate, and optimize production-grade Large Language Model (LLM) applications. It offers observability features such as tracing, detailed metrics, dataset management, prompt versioning, evaluation tools (LLM-as-a-judge), and custom dashboards, enabling fast iteration and reliable deployment of AI applications. Langfuse supports both cloud-hosted and self-hosted deployments, integrates widely with frameworks and libraries (via Python, JS/TS SDKs and OpenTelemetry), and is trusted by leading organizations and Fortune 500 companies.
Products & Services
- LLM observability and tracing
- Prompt management and versioning
- Automated evaluation (LLM-as-a-Judge)
- Custom dashboards and analytics
- Metrics tracking (cost, latency, usage)
- OpenTelemetry integrations
- Dataset management and experiment tracking
- Public APIs and SDKs (Python, JS/TS)
- Self-hosting and cloud service options
- Enterprise security and compliance features
Use Cases & Case Studies
- Agent observability and debugging
- Automated evaluations of LLM outputs (LLM-as-a-Judge)
- Cost and latency optimization for LLM applications
- RAG (Retrieval Augmented Generation) pipeline monitoring
- Complex multi-agent pipeline tracing and optimization
- Enterprise AI compliance and auditing
- Prompt version management and A/B testing
- Production monitoring and root-cause analysis using custom dashboards
- Khan Academy uses Langfuse to build its Khanmigo AI platform
- Canva builds support experiences using Langfuse
- Merck manages 80+ global AI project teams with Langfuse
Partnerships & Collaborations
- ClickHouse (Langfuse was acquired by ClickHouse)
- Integrations with Canva, Khan Academy, Merck, SumUp, Twilio, Adobe, Magic Patterns, and more
Awards & Recognition
- Langfuse is the #1 most used Open Source LLMOps Product
- Received $4M seed investment from leading VCs including Lightspeed Ventures, La Famiglia, and Y Combinator
Contact Information
Certifications & Compliance
- SOC 2 Type II certified
- ISO 27001 certified
- GDPR compliant
- HIPAA aligned