Pick Evidently if
mL / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50.
Read the Evidently pageEvidently vs Phoenix
Our take
Pick Evidently if you're on a mL / LLM team who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50. Pick Phoenix if you're on a agent team who will self-host Phoenix for $0 (uvx arize-phoenix serve) and only open Arize AX when they want a managed cloud.
Best for
Evidently One Apache dashboard for LLM and classic ML quality
Phoenix See why an agent failed and prove a fix
Free plan
Evidently $0 · local UI (evidently ui). You bring compute and judge-model keys
Phoenix $0 · local / Docker / Kubernetes. You bring compute. Homepage: uvx arize-phoenix serve
Lowest paid
Evidently Not published by the vendor
Phoenix AX Pro $50/mo
Runs where
Evidently Hosted
Phoenix Hosted
Watch out
Evidently $0 is the library, not judge tokens
Phoenix ELv2, not Apache
Last checked
Evidently 2026-10-27 · evidentlyai.com
Phoenix 2026-10-27 · arize.com/pricing
Which one, then?
Pick Phoenix if
agent teams who will self-host Phoenix for $0 (uvx arize-phoenix serve) and only open Arize AX when they want a managed cloud.
Read the Phoenix page