Tessary

Stop your agents from failing silently in production

Tessary is an open-source agent reliability platform. It monitors every production trace, detects failures that sampled evals miss, and investigates the root cause with your agent codebase. It runs cheap, narrow classifiers across every trace. When it detects a recurring issue or change in behaviour, it groups the affected traces into a finding, validates the issue, and investigates what caused it. This keeps monitoring cheap, with deeper analysis reserved for issues that warrant investigation.

Tessary is a Open Source company. It launched on Product Hunt on Oct 22, 2026, with 23 upvotes. Adamlead has 1 person on file at Tessary, 1 with a verified email.