Pydantic Logfire vs Traceloop / OpenLLMetry
Facts come from each vendor's own pages; download numbers are the headline package of each tool in 2026-W40.
| Fact | Pydantic Logfire | Traceloop / OpenLLMetry |
|---|---|---|
| PyPI downloads, week (rank) | 3,488,038 (#5)logfire | 455,110 (#11)traceloop-sdk |
| npm downloads, week (rank) | 31,486 (#16)@pydantic/logfire-node | 147,877 (#8)@traceloop/node-server-sdk |
| GitHub stars (rank) | 4,509 (#23)pydantic/logfire | 7,474 (#15)traceloop/openllmetry |
| PyPI series (12 weeks) | ||
| npm series (12 weeks) | ||
| Categories | Tracing & observability, Evaluation, Gateways with observability | Tracing & observability, Evaluation, Prompt management |
| Status | Generally available | Generally available |
| Licence | Proprietary | Apache-2.0 (open core) |
| Self-host | Enterprise only | Enterprise only |
| OpenTelemetry | Native (OTLP) | Native (OTLP) |
| Pricing model | usage | contact |
| Entry price | $49/mo; Team plan, 5 seats, 10M records included then $2 per million; Personal plan is free forever (10M records/month, hard-capped); Growth $249/month. | Contact sales; Free Forever plan $0/mo (up to 50K spans/month, 5 seats, 24 h retention); Enterprise is 'Let's chat' with no published price. OpenLLMetry SDK itself is free. |
| Free tier | Yes | Yes |
| Measurability | Measured (mapped SDK packages) | Measured (mapped SDK packages) |
| Sources | pricing · licence · self-host · OTel (checked 2026-10-07) | pricing · licence · self-host · OTel (checked 2026-10-07) |
More downloads means more package installs (including CI and dependencies), not a better product. See the methodology.