Compare software

LangSmithArize Phoenix
Freemium

Can be tried for free, with paid plans listed on its pricing page.

 Freemium

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

Web Web, Self-hosted
  • Detailed step-by-step agent tracing
  • SDKs for Python, TypeScript, Go and Java
  • Tracing, evals, prompts and experiments in one tool
  • Runs locally, in Docker or on Kubernetes
  • Proprietary hosted service
  • Self-hosting requires Kubernetes
  • 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
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 September 26, 2026

Checked September 26, 2026

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