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
X.509 certificate issuance via AWS KMS with private keys stored in HSM
Real-time behavioral monitoring and drift detection across eight risk dimensions
Content-risk scoring of agent outputs per EU AI Act Article 5
Automatic certificate revocation when risk crosses 0.85 threshold within 60 seconds
Compliance reports mapped to NIST AI RMF, NIST CSF 2.0, ISO 27001, MiCA, and EU AI Act
Public verification endpoint with sub-500ms response and no authentication required
OpenTelemetry (OTLP) export to Datadog, Grafana, Honeycomb, and Splunk
RFC 8693 delegation chains and signed forensics
Webhook event delivery with HMAC signatures and audit logging
AgentMail: verifiable email inbox per certified agent for regulatory communication
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
Only platform that issues cryptographic identity to deployed agents, monitors behavior in real time, and generates compliance reports as one unified product
X.509 certificates provide institutional trust standard used by banks and governments for 30+ years
Auto-revocation with sub-60-second SLA stops misbehaving agents without manual intervention
Content-risk scoring evaluates agent output language, not just actions, catching prompt injections and policy violations
Private keys never accessible; stored only in AWS KMS with cryptographic signing performed by KMS directly
Kakunin