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Laminar vs Arize Phoenix: catalog facts
Laminar	Arize Phoenix
Free Free and open source under Apache 2.0; a managed platform is offered at laminar.sh.	Freemium Phoenix is free to self-host; Arize AX is a separate managed paid platform.
Web, Self-hosted	Web, Self-hosted
Automatic tracing for many agent frameworks and model APIs Evals that run locally or in CI with a comparison UI	Tracing, evals, prompts and experiments in one tool Runs locally, in Docker or on Kubernetes
Requires adding its SDK to your application Self-hosting involves running several services including ClickHouse	Source-available license rather than an OSI-approved one Some advanced features are in the separate paid Arize AX product
Self-hosted, Hosted service	Self-hosted, Hosted service
Open source	Closed source
License: Apache-2.0	License: Elastic-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 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.