Langfuse
8.1#1 in ai agent observability toolsFrom $29 a monthFree planWebAPILinuxSelf-hosted
VisitLangfuse vs PromptMetrics
PromptMetrics
6.1#19 in ai prompt management softwareWebAPILinuxmacOS
VisitWhat both publish
| Fact | Langfuse | PromptMetrics |
|---|---|---|
| Headquarters | Berlin, Germany; San Francisco, United States | Berlin, Germany |
| Observability | Hierarchical traces capture LLM calls, tool invocations, and retrieval steps, with filtering by user, session, cost, latency, and metadata. | It logs LLM request metadata such as model, tokens, latency, cost, and custom tags, and can export data through OpenTelemetry. |
| SDKs | Official SDKs are Python v5 and JavaScript/TypeScript v6; other languages can use OpenTelemetry instrumentation. | The project lists Node.js and Python SDKs for programmatic access. |
Langfuse plans
- HobbyFree
- HobbyFree
- Core$29 a month
- Core$29 a month
- Pro$199 a month
- Pro$199 a month
PromptMetrics plans
No prices published.
Pick Langfuse if…
Langfuse suits teams building AI agent applications that need tracing, prompt management, and evaluation tools. It also supports teams that want to self-host the core on their own infrastructure.
Pick PromptMetrics if…
It suits developers and teams that need self-hosted prompt versioning, LLM observability, evaluations, and compliance checks. It fits environments using multiple model providers and Git-backed workflows.