Comparison

Arize Phoenix vs Maxim AI

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Arize Phoenix

Open-source LLM tracing and eval.

+ Open source with OTel foundations
+ Good LLM-as-a-judge evals built in
− Elastic license restricts some hosted offerings
− Enterprise features in the paid Arize cloud

Maxim AI

Evaluation and simulation for AI agents.

+ Simulation and prompt-testing focus
+ Good pre-production workflows
− Proprietary
− Narrower than full observability suites

Spec	Arize Phoenix	Maxim AI
Category	eval-observability	eval-observability
License	Elastic-2.0	Proprietary
Open source	Yes	No
Self-hostable	Yes	No
MCP support	No	No
Pricing	free	freemium
Starting price	Self-host free	Free tier
Models	multi	multi
Languages	python, typescript	python, typescript
GitHub stars	10.3k	—
Last activity	2026-06-25	—