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Pydantic Logfire
OpenTelemetry-based observability service from the Pydantic team with first-class PydanticAI and Python ecosystem integration.
| Category | Observability & Tracing |
| OpenTelemetry-native | Yes — no proprietary-SDK lock-in |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | freemium |
| Pricing notes | Free monthly span allowance, then usage-based per-span pricing; SDK is OSS |
| Framework integrations | pydantic-ai, openai-sdk, anthropic, opentelemetry, fastapi |
| Funding / ownership | Pydantic raised $12.5M Series A (Sequoia, 2023) |
| GitHub stars | 4,299 |
| Maintenance | active (commit 2026-06-12) |
| License (GitHub) | MIT |
| Open issues | 232 |
| Maturity signal | 95/100 (Mature) — computed from public GitHub signals, see methodology |
Pricing/feature source: https://pydantic.dev/pricing
Maturity signal is computed from public GitHub data only. How it is calculated.
Frequently asked questions
Is Pydantic Logfire open source?
Yes. Licensed under MIT.
Can I self-host Pydantic Logfire?
Yes — Pydantic Logfire can run in your own infrastructure.
Is Pydantic Logfire OpenTelemetry-native?
Yes — Pydantic Logfire speaks OpenTelemetry (OTLP) natively, so there is no proprietary-SDK lock-in.
How much does Pydantic Logfire cost?
Freemium. Free monthly span allowance, then usage-based per-span pricing; SDK is OSS