Diffblue Stock

An Oxford spin-out using AI to write code, starting with Java unit tests that catch errors earlier and faster in a DevOps pipeline.

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About Diffblue Stock

Automated code creation will play a major role in the future of software development. A spin-out from the world-leading AI research group at Oxford, our automated code writing capability has far-reaching potential and will eventually transform how software is written. Initially, Diffblue’s technology is being deployed to save developer time and ensure robustness in one of the most tedious and time-consuming areas of software development: writing unit tests. Diffblue's product stands out from code suggestion tools in that it works completely autonomously, using reinforcement learning to write fully formed tests that are guaranteed to compile, run and find bugs.

Funding History

June 2017$17.0M
January 2022$4.0M
November 2022$8.0M



Mathew Lodge

VP Engineering

Dr Andy Piper

Co-founder & CTO

Peter Schrammel


Mike Mulford


Jane Silber

Chief Science Officer

Daniel Kroening


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