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Pydantic Logfire vs Helicone: catalog facts
Pydantic Logfire	Helicone
Freemium Free for 10 million spans, logs and metrics per month, no card required; paid plans above…	Freemium Hosted plans start with a 7-day free trial and no credit card; the open-source code can be…
Web	Web, Self-hosted
Traces LLM calls alongside API and database activity Built on OpenTelemetry with SQL querying	Logs and analyses LLM requests in one place Tracks costs across providers
Primarily a hosted service requiring an account Self-hosting is offered as an option rather than the default	Recently joined Mintlify, so its roadmap is uncertain Hosted version is a paid service after the trial
Web application, Hosted service	Self-hosted, Hosted service
Closed source	Open source
License not stated	License: Apache-2.0
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.