agent reliability

Stop your agents from failing silently.

Built for engineers running agents in production, Tessary watches every trace, catches what broke, and shows you why.

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116

traces emitted in the last hour

3

sampled and evaluated

1

wrong, raised by a customer

how it works

Monitor every trace, not a sample.

Your agent already emits spans. Tessary reads all of them as they land – no sampling, no LLM call.

Filter down to what broke.

Twelve traces break the same way. Tessary groups them into one case.

Analyze them against your code.

We read the failing traces against your repo and find the change that explains it.

Ship a fix in minutes.

You get a draft pull request with the cause and the evidence, minutes after the first bad trace. You review and merge.

case 1184 · checkout agent · 12 tracesreading repository…

tools/refund.py · changed in a1f9c2

11def resolve_refund(order, cust):
12payload = {"order": order.id}
13cust never reaches the payload
14return client.refund(payload)

all 12 failing traces hit line 13 · no healthy trace does

The refund payload lost customer_id.

12payload = {"order": order.id}
13payload["customer_id"] = cust.id
elapsed
14 min from the first failing trace
rate
0.4% → 11.2% in four hours
cause
commit a1f9c2
evidence
218 traces attached
handoff
draft pull request, yours to review

before release

Catch the obvious ones before you ship.

Everything above runs after release. This runs before it – we read every change against what your agent is supposed to do, so you catch drift in the pull request instead of in production.

pull request #482checking
intent · never resolve a refund without a verified order
reading the diff

pricing

Everything it does, one simple price.

$100/ month

traces per month100,000

10,00010,000,000

One trace is one agent turn: a user's message, your agent's full response, and every tool call in between.

features

  1. Cases

    Groups every alert on one problem, root-causes it, and hands you a fix to review.

  2. Custom Classifiers

    A filter fine-tuned to your agent, catching bad traces automatically.

  3. Observer Agent

    Reads every diff before it ships and flags which failure modes it puts at risk.

  4. Grader Autopilot

    Generates your quality checks from your code and traces, then keeps them updated as your product changes.

Send us the traces you already emit.

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