diffblue
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Diffblue
Diffblue is an Oxford, UK software company that builds Diffblue Cover, an autonomous AI agent that writes and maintains Java unit tests. Spun out of the University of Oxford in 2016, the company uses reinforcement learning rather than large language models alone to generate test suites at scale, targeting large enterprises - including several of the biggest U.S. banks - that need to raise code coverage, modernize legacy Java applications, and ship software with fewer defects.
Toffer Winslow
Toffer Winslow is the CEO and a board member of Diffblue, an Oxford-spun AI company that uses reinforcement learning - not large language models - to automatically write unit tests for Java code, at a pace of roughly one test every two seconds. A three-decade enterprise-software operator, he has run go-to-market and led companies through the growth-and-exit cycle at Dynatrace, RSA Security, Lavastorm, Tamr, and StackState (which he steered into an acquisition by SUSE). At Diffblue he is selling deterministic, on-premises AI to some of the most security-anxious buyers on earth: four of the ten largest U.S. banks, plus Citi, ING, Cisco, AstraZeneca, and BNY Mellon.