AppsEvaluations

Autessa Evaluations and Arize Phoenix

Autessa Evaluations as a Arize Phoenix alternative

Arize Phoenix is a popular open-source tool for tracing and evals, built on OpenTelemetry, that you run yourself or move to Arize AX for a managed service. It suits engineers who want to read traces. Autessa Evaluations keeps a full log of every conversation with nothing to host or instrument for Autessa agents, and turns it into verdicts and dashboards a business owner can read.

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Case viewer · Billing support agent · Double chargeSAMPLE
USER
Hi, I was charged twice for order 1042.
TOOL_CALL · billing_lookup
{ "orderId": "1042" }
TOOL_RESULT · billing_lookup
2 charges of $48.00 on card ending 4417
ASSISTANT
I can see the duplicate $48 charge on order 1042. I’ve refunded it, and you’ll see it in 3–5 business days.
PASSED
EXPECTED OUTCOME · MET

Judge’s notes

GroundednessGrounded

The $48 amount and order 1042 match the billing lookup result.

Task completenessComplete

Found the duplicate charge and refunded it, as asked.

Argument faithfulnessAll faithful

The order number passed to the refund tool came from the user.

EfficiencyEfficient

Two tool calls, both needed.

Status SUCCESSFUL

Side by side

Autessa Evaluations vs Arize Phoenix

CapabilityAutessa EvaluationsArize Phoenix
Who runs itManaged by AutessaSelf-host, or Arize AX managed
Full conversation logs with no tracing setup✓OpenTelemetry instrumentation
Simulated users that hold multi-turn conversations✓Not listed
Response checks that fix or block a reply before it is sent✓Not listed
Task completeness and argument faithfulness scored by default✓LLM, code or human evaluators
Version performance dashboards for business owners✓Traces and experiment views
Human versus automated comparison✓Not listed
Batch grading with signed completion webhooks✓Not listed
Full headless access (Autessa MCP)✓✓ Own MCP: traces, datasets, experiments
100% customizable, code and all (Autobot)✓Open source (Elastic License), self-hosted
Human labels on conversations✓✓
Datasets and experiments✓✓
LLM-as-a-judge scoring✓✓

Based on publicly available information as of November 2026. Product names are trademarks of their owners.

Where Autessa wins

Why teams pick Autessa over Arize Phoenix

  • Nothing to host or instrument: every Autessa conversation and tool call is logged automatically, and other agents send transcripts to the Grading API.
  • Rehearse before release: test sets and simulated users hold real conversations with your agent.
  • Response checks stop a bad reply before it reaches the customer, which a trace can only show after the fact.
  • More than read access. Through the Autessa MCP, Claude or your own agent can run test sets and grade transcripts, not only query what already happened.
  • Phoenix is open and yours to fork. With Autobot you get the same freedom from a plain-language request, down to the code, and nothing to run.
Run results · Refund requests · Version 4COMPLETEDSAMPLE
86%
Pass rate
258
Passed
36
Failed
2
Sandbox faults

By persona

PersonaPass rateAvg turns
Impatient customer91%3.2
Detail-checker81%5.7

Stop reasons

GOAL REACHED 241STOP CONDITION 31MAX TURNS 24AGENT ERROR 2TIMEOUT 2

Switching

Up and running in an afternoon

  1. 1

    Grade what you already have

    Upload past transcripts to Transcript Grading or send them to the Grading API and get verdicts right away.

  2. 2

    Turn datasets into test sets

    Bring your test inputs over as cases with plain-English expected outcomes, and add simulated users.

  3. 3

    Score and guard live traffic

    Turn on AutoEval and response checks, then tailor rubrics and checks to your company.

Other comparisons

FAQ

Questions about switching from Arize Phoenix

Is Autessa Evaluations an Arize Phoenix alternative?

For teams who want agent evaluation and conversation logs managed for them, yes. Autessa is a hosted platform rather than an open-source tool you run yourself.

Do I need to add tracing to my agent?

Not for agents built on Autessa: every conversation and tool call is logged automatically. Agents elsewhere send their transcripts to the Grading API.

Where is my data?

In Autessa. See the security page and the Trust Center for how evaluation data is handled.

Phoenix is open source. Can I customize Autessa as deeply?

Yes. The app can be changed down to its code, by Autobot from a plain-language request or by your developers, with nothing to host.

Can Claude use Autessa Evaluations through MCP?

Yes. The Autessa MCP lets Claude, ChatGPT, Cursor or your own agents run test sets, grade transcripts and read statistics, within the access of whoever connected it.

See it on your own agent

Run a test set with simulated users, or grade a transcript you already have.

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Test sets · simulated users · four-dimension scoring · response checks · grading API

100% customizable, code and all

Make Autessa Evaluations fully your own.

Use it out of the box, then change anything. Ask Autobot, Autessa’s AI builder, for a new field, screen, report, workflow or agent and it builds it into your copy of the app. Or open the code and edit it yourself. Nothing is locked: the app, its data and its code are yours.

Start free and make it yours