Building a world in which computers tell us exactly what they did and why
Undo helps developers understand complex code and fix bugs faster, with time travel debugging for large-scale codebases built on Linux.
Developers spend far too much time figuring out what code actually does – either to understand other people’s code or to find and fix bugs. Debugging can be especially time-consuming when software failures cannot be reproduced.
With time travel debugging, developers can reliably diagnose the root cause of any bug in hours instead of weeks – customer issues, a large backlog of test failures faster, flaky tests, multithreading issues etc. No bug remains unresolved.
Global tech players in networking & security, database, financial services, and EDA use Undo to release on schedule, ensure stability at scale, and boost customer satisfaction.
Building a world in which computers tell us exactly what they did and why
Undo is the time travel debugging company for Linux. We equip developers with the technology to understand complex code and fix bugs faster.
Developers spend far too much time figuring out what code actually does – either to understand other people’s code or to find and fix bugs. Debugging can be especially time-consuming when software failures cannot be reproduced.
Time travel debugging solves this problem by making bugs 100% reproducible. By bringing time travel debugging to CI and System Test, Undo’s LiveRecorder enables developers to save time diagnosing the root causes of new regressions, legacy bugs, and flaky tests.
Thousands of developers across leading technology firms including SAP, Juniper Networks, and Siemens use LiveRecorder to improve developer productivity, development velocity, and software quality.
DEBUG COMPLEX AND LARGE-SCALE LINUX APPLICATIONS WITH UNDO’S PRODUCTS
Thousands of developers across leading tech firms including SAP, Juniper Networks and Siemens use Undo to improve developer productivity and ensure stability at scale.
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.
Awards
THE LATEST NEWS FROM UNDO
New Release - Undo Suite 8.1 for C/C++/Go/Rust
Undo have released version 8.1 of the Undo Suite, which introduces support for applications using the ARM Scalable Vector Extension, improved integration with Visual Studio Code and more!
Undo sponsors ACCU 2025
In April, we sponsored and exhibited at ACCU 2025, one of the biggest programming events on the calendar. We had a great week catching up with and meeting new engineers from all over the world, and even hosted the pub quiz night!
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``.