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Helicone vs Arize Phoenix: catalog facts
Helicone	Arize Phoenix
Freemium Hosted plans start with a 7-day free trial and no credit card; the open-source code can be…	Freemium Phoenix is free to self-host; Arize AX is a separate managed paid platform.
Web, Self-hosted	Web, Self-hosted
Logs and analyses LLM requests in one place Tracks costs across providers	Tracing, evals, prompts and experiments in one tool Runs locally, in Docker or on Kubernetes
Recently joined Mintlify, so its roadmap is uncertain Hosted version is a paid service after the trial	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 September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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