Diffblue

{{notability|corp|date=May 2023}}

{{Short description|AI unit test-writing tool for Java code}}

Diffblue Ltd is a spin-out from University of Oxford whose Cover product uses AI to automatically write unit tests for Java code.{{Cite web|title=How Diffblue uses AI to automate unit testing for Java applications|url=https://www.techrepublic.com/article/how-diffblue-uses-ai-to-automate-unit-testing-for-java-applications/|access-date=2021-05-31|website=TechRepublic|date=8 September 2020 |language=en}} It is similar to GitHub Copilot in that it uses AI to write code, but differs in that it writes code fully autonomously vs. providing code suggestions for humans to review and edit. Diffblue was founded by Daniel Kroening and Peter Schrammel in 2016,{{Cite web|title=University of Oxford spin-out Diffblue allows developers to experience AI for Code for free|url=https://bdaily.co.uk/articles/2019/02/25/university-of-oxford-spin-out-diffblue-allows-developers-to-experience-ai-for-code-for-free|access-date=2021-05-31|website=Bdaily Business News|date=25 February 2019 |language=en}} and Mathew Lodge became CEO in July 2019{{Cite web|title=Interview with Mathew Lodge, CEO Diffblue|url=https://www.erevena.com/articles/mathew-lodge-ceo-at-diffblue-2-2/|access-date=2022-01-10|website=Erevana|date=17 November 2020 |language=en}}

In 2017, Diffblue raised £17.3 million in Series A funding led by Goldman Sachs and Oxford Sciences Innovation.{{Cite web|last=Ghosh|first=Shona|title=An Oxford University artificial intelligence startup has raised £17 million to check code for errors|url=https://www.businessinsider.com/oxford-university-ai-startup-diffblue-has-raised-17-million-in-series-a-funding-2017-6|access-date=2021-05-31|website=Business Insider|language=en-US}} In 2020, Diffblue released a freeware version, Cover Community Edition. It can be used by both open source and commercial organisations.{{Cite web|date=2021-05-24|title=Diffblue EULA for Community Edition IntelliJ Plugin|url=https://docs.diffblue.com//licenses/ce-eula/|access-date=2021-05-31|website=Diffblue Docs|language=en}} Diffblue raised $7m in January 2022 in a round led by venture capitalist IP Group,{{Cite web|title=Diffblue Closes Investment Round to Take Total Venture Funding to $32 Million|url=https://www.ipgroupplc.com/media/portfolio-news/2022/2022-01-26|website=IP Group|language=en-uk}} and a further $8m in November 2022 in a round led by AlbionVC.{{Cite web|last=Glen|first=Sephanie|title=Diffblue expands AI-powered unit testing platform|url=https://www.techtarget.com/searchsoftwarequality/news/252527416/Diffblue-expands-AI-powered-unit-testing-platform|access-date=2023-01-20|website=TechTarget|language=en-US}}

Diffblue customers include Goldman Sachs, S&P Global, Citi, JP Morgan and AWS.{{Cite web|title=Diffblue launches a free community edition of its automated Java unit testing tool|url=https://techcrunch.com/2020/09/08/diffblue-launches-a-free-community-edition-of-its-automated-java-unit-testing-tool/|access-date=2021-05-31|website=TechCrunch|date=8 September 2020 |language=en-US}}