Arize Phoenix

Open-source tracing and evaluation for LLM apps and agents.

open-source / paid cloud · starts at $50/mo

Website GitHub Pricing source

Pricing model: open-source / paid cloud
Starts at: $50/mo
GitHub stars: 11,858
Last push: Oct 15, 2026
Last verified: Oct 15, 2026

Tier lists

Where Arize Phoenix is ranked, and why. Every placement is provisional.

A
Agent Observability & Evals
Agents
Strong OpenTelemetry-based open-source option.
provisional

Related tools

Other tools on the same provisional lists.

Comparisons