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PromptLayerArize Phoenix
Freemium

Free plan available with paid tiers for teams.

 Freemium

Phoenix is free to self-host; Arize AX is a separate managed paid platform.

Web Web, Self-hosted
  • Visual prompt editing without code redeploys
  • Evaluations with datasets, graders and human review
  • Tracing, evals, prompts and experiments in one tool
  • Runs locally, in Docker or on Kubernetes
  • Hosted service; prompts and logs live on its servers
  • Requires an account
  • Source-available license rather than an OSI-approved one
  • Some advanced features are in the separate paid Arize AX product
Web application, Hosted service Self-hosted, Hosted service
Closed source Closed source
License not stated License: Elastic-2.0
Account needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked October 2, 2026

Checked September 26, 2026

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