The only self-hosted prompt registry that ships in one binary.
SaaS observability vendors charge per-seat for data you already own. PromptMetrics runs on your infra, stores data in SQLite or Postgres, and versions prompts in Git.
v0.10MITSelf-hosted
Feature comparison
Feature
PromptMetrics
Langfuse
Langsmith
W&B
Self-hosted
✓Free, MIT
!Complex Docker
!Enterprise only
✕SaaS only
SQLite default
✓
✕
✕
✕
Git-backed prompts
✓
✕
✕
✕
OTLP trace ingestion
✓
✓
✓
!Limited
Prompt versioning
✓Git tags
!UI only
✓
!Artifacts
Evaluations
✓Built-in
✓
✓
✓Sweeps
Per-seat pricing
✓$0
✕$$$
✕$$$
✕$$$
Data residency / EU AI Act
✓Self-hosted
!Cloud
!Cloud
!Cloud
Single binary deploy
✓
✕
✕
✕
Open source
✓MIT
✓Apache
✕Closed
✕Closed
Why self-hosted matters
Data sovereignty
Your prompts, traces, and evals never leave your infrastructure. EU AI Act compliance by default.
Predictable costs
No per-seat pricing. No ingestion-based billing. Runs on a $5 VPS or your existing cluster.
Git-native versioning
Prompts are immutable Git tags, not database rows. Roll forward, roll back, diff — just like code.
Switching is easier than you think
PromptMetrics ships as a single Node binary. Most teams are running in under 10 minutes.