Pick DeepEval if
python teams who will run DeepEval locally at $0 and only open Confident AI Free / Starter $200 when they want a shared cloud.
Read the DeepEval pageDeepEval vs Phoenix
Our take
Pick DeepEval if you're on a python team who will run DeepEval locally at $0 and only open Confident AI Free / Starter $200 when they want a shared cloud. 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
DeepEval Unit-test the agent at $0
Phoenix See why an agent failed and prove a fix
Free plan
DeepEval $0 · local pytest + inspect TUI. You pay judge-model tokens
Phoenix $0 · local / Docker / Kubernetes. You bring compute. Homepage: uvx arize-phoenix serve
Lowest paid
DeepEval Team $2/mo
Phoenix AX Pro $50/mo
Next step up
DeepEval Confident AI Starter from $200/mo
Phoenix
Runs where
DeepEval Hosted
Phoenix Hosted
Watch out
DeepEval $0 is the library, not judge tokens
Phoenix ELv2, not Apache
Last checked
DeepEval 2026-10-27 · confident-ai.com/pricing
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