Can I keep Phoenix and use Omnia?

Yes. Omnia emits standard OpenTelemetry, which Phoenix ingests.

omnia vs arize phoenix

Arize shows you how the agent is doing. Omnia acts on it.

Omnia is the runtime the agent sits in, so redaction, tool policy and the release gate act on what the scores say. Its traces still go to Phoenix over OpenTelemetry.

A guardrail evaluator flags an agent leaking an account number.

on omnia

The account number was a named field in the tool response, so it was replaced before the model saw it. A request for someone else’s account was refused by policy before the tool ran. Both are in the audit. docs

on arize phoenix

Arize’s guidance for real-time guardrails: AX doesn’t block requests, your app does. Evaluators run after the fact, asynchronously. their docs

Enforcement where the agent runs

Policy compares each tool call’s arguments with the caller’s identity and fails closed. Named fields are redacted before they reach the model, the session recording or long-term memory. docs enterprise

Arize Phoenix: Guardrails are recorded as spans; your application does the blocking. source

Tests that behave like users

Simulated callers hold whole conversations with the agent through its real tools. Some try to break it, some call by duplex voice, and the release waits on the results. docs

Arize Phoenix: Datasets, experiments and LLM, code and human evaluators. Simulated users aren’t documented. source

Live scores that move traffic

A new version starts on part of the traffic. Its live metrics decide whether it gets more or is rolled back. docs enterprise

Arize Phoenix: Online evals score sampled sessions; acting on them is up to you. source

At a glance

Topic	Omnia	Arize Phoenix, per its docs
LicenceLicense	yes PromptArena and PromptKit are Apache 2.0. docs	documented Phoenix is Elastic License 2.0. source
OpenTelemetry	yes Emits and ingests. docs	documented Built on OpenTelemetry. source
CI gate	yes Built into the release. docs	documented pytest and Vitest plugins. source
Simulated users	yes Against real tools. docs	not documented Not documented. source
Runtime enforcement	yes Policy and redaction before the call. docs enterprise	not documented Your app. source
Runs and rolls out agents	yes Yes. docs	not documented Observes only. source

Common questions

Can I keep Phoenix and use Omnia?: Yes. Omnia emits standard OpenTelemetry, which Phoenix ingests.

Put your own agent through the gate.

Install Omnia in your cluster and run it free while you build.

Arize Phoenix claims are from Arize AI’s published documentation, checked 22 October 2026. Spot something out of date? Tell us.

Install it in your cluster Or walk through it with us →