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Arize Phoenix vs Laminar: catalog facts
Arize Phoenix	Laminar
Freemium Phoenix is free to self-host; Arize AX is a separate managed paid platform.	Free Free and open source under Apache 2.0; a managed platform is offered at laminar.sh.
Web, Self-hosted	Web, Self-hosted
Tracing, evals, prompts and experiments in one tool Runs locally, in Docker or on Kubernetes	Automatic tracing for many agent frameworks and model APIs Evals that run locally or in CI with a comparison UI
Source-available license rather than an OSI-approved one Some advanced features are in the separate paid Arize AX product	Requires adding its SDK to your application Self-hosting involves running several services including ClickHouse
Self-hosted, Hosted service	Self-hosted, Hosted service
Closed source	Open source
License: Elastic-2.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

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