Retrace

The execution replay engine for AI agents

What is Retrace?

AI
Freemium
Launched week 43, 2026

Retrace is an execution replay and reliability platform for AI agents that records every model and tool call. Developers can replay failed runs, fork from the exact step where an error occurred, and test fixes before deploying. The platform also provides runtime guardrails, circuit breakers, evaluation gates for CI/CD, and multi-agent tracing.

Founder inside

Someone answered our questions about Retrace.

Why is Retrace worth using over standard logging libraries or generic APM tools when debugging AI agent failures?

Logging libraries and APM tools give you spans and stack traces you still have to reconstruct by hand. Retrace records the full execution of an agent run - every model call and tool call - so you can replay the failed run exactly as it happened, fork from the step where it broke, and test the fix against the original failure before deploying. It understands agent control flow: tool use, guardrails, and multi-agent handoffs.

Retrace alternatives

The ai tools listed here closest to Retrace, by shared categories and tags and by how alike the two descriptions read. Not a ranking against Retrace — open one and judge for yourself.

1 comment

SomeoneMaker1h
Maker here. Built Retrace after losing a day to an agent failure I could not reproduce. Retrace records every model and tool call, so you can replay the run, fork from the failing step and test fixes.