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Pydantic Logfire vs Opik: catalog facts
Pydantic Logfire	Opik
Freemium Free for 10 million spans, logs and metrics per month, no card required; paid plans above…	Free The open-source platform is free to self-host.
Web	Web, Self-hosted
Traces LLM calls alongside API and database activity Built on OpenTelemetry with SQL querying	Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows
Primarily a hosted service requiring an account Self-hosting is offered as an option rather than the default	Self-hosting means running several services yourself Contributors must sign a CLA
Web application, Hosted service	Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.