Features
Real-time credit ledger with grants, rollovers, expiration
Feature entitlement gating (boolean and metered)
Subscription lifecycle management (upgrade, downgrade, proration)
Usage-based billing (per-unit, per-seat, credit-based)
Billing controls (spend caps, auto top-ups, usage alerts)
Flexible pricing (plans, variants, add-ons, tiers, graduated)
Sub-entity balances and plans
Webhooks and Slack/Discord notifications
Fail-open defaults for reliability
Observability via ClickHouse (usage history, charts, logs)
Plan versioning and grandfathering
Trial and auto top-up management
Minimal API: attach, check, track
Self-hostable open-source
Stripe as payment processor
Hierarchical LLM traces with cost/latency filtering
LLM-as-a-judge evaluation and heuristic functions
One-click prompt deployment and rollback
Playground for side-by-side model/input testing
Experiments with test case comparison
Human annotation and golden dataset creation
Cost and latency dashboards with alerts
Monitors and alerts (Slack, webhooks, GitHub Actions)
Full-text search (Cloud rollout)
Code evaluators (Python/TypeScript)
Langfuse Assistant (natural-language queries)
Multi-modal datasets (images, audio, video, documents)
OpenTelemetry-native instrumentation
Python and TypeScript native SDKs
REST APIs and S3 blob storage export
