NEW RESEARCH REPORT: Overcoming the limitations of coding agents in complex software systems
About us
Building a world in which computers tell us exactly what they did and why
Undo equips AI agents with the runtime context they need to solve hard problems on the most complex codebases.
We enable autonomous, evidence-based root-cause analysis of complex software issues.
By recording failing program executions and capturing exactly how software behaves at runtime, Undo gives AI agents the runtime context they need to understand what actually happened, reason about software behavior and solve problems that code alone cannot explain.
That’s why engineering teams at leading tech organizations use Undo to automate root cause analysis, resolve issues up to 100x faster, solve problems previously beyond the reach of AI agents, and maintain stability at scale.
Why Undo?
The problem
Hard to reproduce defects make debugging time-consuming
Developers spend far too much time figuring out what code actually does – either to understand other people’s, or agent’s code or to find and fix bugs. Debugging can be especially time-consuming when software failures cannot be reproduced.
The solution
Make bugs 100% reproducible with Undo
Undo solves this problem by making bugs 100% reproducible. Memory corruption issues, race conditions, and intermittent bugs which would otherwise remain unresolved or take weeks (or months!) of engineering effort can now be diagnosed in an afternoon – enabling developers to deliver code changes on time and quickly fix customer issues.
Thousands of developers across leading tech firms including SAP, Juniper Networks and Siemens use Undo to improve developer productivity and ensure stability at scale.
The story of Undo
Undo started out as a fast-growing technology start-up founded by Greg Law and Julian Smith. Both started working evenings and weekends in Greg’s garden shed, determined to build a tool for developers to ease the pain of debugging complex software. Following receipt of seed funding in 2012, the company is now established as the time travel debugging company for Linux software development.
The latest news from Undo
New Release - Undo Suite 10.1 for C/C++/Go/Rust
Undo have released version 10.1 of the Undo Suite, which brings performance improvements, codex support, and more.
We’re proud of our customers
Earlier this year, we hosted our 2026 Customer Council in California, bringing together senior and principal engineering leaders from the world’s most important technology organisations.
Undo Cheat Sheet
To help you get the most out of Undo and ensure you’re using it to its full potential, we’ve put together a handy Cheat Sheet.