Pick HoneyHive if
agent teams who will stay on Developer at $0 (10k events, 5 users, 30-day retention) while they open a first Sessions tree, then Enterprise when they need SSO or custom limits.
Read the HoneyHive pageHoneyHive vs Phoenix
Our take
Pick HoneyHive if you're on a agent team who will stay on Developer at $0 (10k events, 5 users, 30-day retention) while they open a first Sessions tree, then Enterprise when they need SSO or custom limits. 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
HoneyHive See why an agent branched and score that path
Phoenix See why an agent failed and prove a fix
Free plan
HoneyHive $0 · no card. 10,000 events / month. Up to 5 users. Automated and human evaluations. Prompt versioning and deployments. Full observability suite. CI/CD. 30-day retention. Community support
Phoenix $0 · local / Docker / Kubernetes. You bring compute. Homepage: uvx arize-phoenix serve
Lowest paid
HoneyHive Not published by the vendor
Phoenix AX Pro $50/mo
Runs where
HoneyHive Local or hosted
Phoenix Hosted
Watch out
HoneyHive Developer is 10k events / 5 users / 30 days
Phoenix ELv2, not Apache
Last checked
HoneyHive 2026-10-27 · honeyhive.ai/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