London, UK – [13 May] – NextWave Consulting, the award-winning transformation and automation consultancy for Financial Services, is embarking on a strategic collaboration with Diffblue, creators of the world’s first AI-powered unit test writing agent, Diffblue Cover. This partnership aims to transform software testing in financial institutions, delivering rapid improvements in quality, speed, and efficiency across core modernisation projects and digital transformation efforts.
Poor testing remains one of the top causes of delays and cost overruns, affecting over 30% of technology programmes in the financial sector. By combining NextWave’s deep industry expertise and leadership in AI-enabled transformation with Diffblue’s proven ability to autonomously generate high-coverage unit tests for Java code, the collaboration will enable financial institutions to de-risk change initiatives, reduce testing effort, and accelerate digital delivery.
NextWave works with many of the world's leading financial institutions, including global banks, asset managers, insurers, and private equity firms. Its proven track record in strategy and execution across complex transformation initiatives makes it the ideal partner to deliver test automation at scale using cutting-edge AI.
“At NextWave, we are focused on delivering real business outcomes at speed. Our collaboration with Diffblue unlocks a new level of capability in software testing,” said Chris Dutta, Partner and Testing Practice Lead at NextWave. “With Diffblue Cover, our clients can now achieve dramatically higher test coverage and faster delivery across legacy modernisation, cloud migration, and DevOps projects.”
Diffblue Cover leverages reinforcement learning to autonomously write unit tests for Java applications, enabling development teams to test at scale without manual burden. Financial institutions using Diffblue have achieved up to 26x higher test productivity than traditional code assistants and, within days, have increased test coverage on critical legacy systems from under 20% to over 80%.
“Partnering with NextWave allows us to reach more financial institutions looking to reduce risk, improve resilience, and deliver faster,” said Toffer Winslow, CEO of Diffblue. “Together, we’re redefining what’s possible in software delivery.”
This collaboration is already delivering tangible results, with early projects showing accelerated regression testing, improved coverage of legacy code, and reduced time to production in strategic testing programmes.
About NextWave Consulting
NextWave is an award-winning Consultancy. Financial Services firms trust us to provide market-leading strategy, specialist transformation and AI-enabled automation solutions. We help our clients rapidly deliver business outcomes. NextWave supports many of the world’s leading financial institutions, including global banks, insurance firms, asset and wealth managers and private equity houses. Visit nxwave.com for more information.
About Diffblue
Founded by researchers from the University of Oxford, Diffblue uses game-changing AI technology to fundamentally transform the way developers write code. An early pioneer of generative AI, Diffblue leverages reinforcement learning to automate tedious and error-prone parts of the SLDC (software development lifecycle) with trusted results. Capable of writing unit tests 250x faster than a human developer, Diffblue Cover autonomously helps software teams improve code quality, expand test coverage and increase productivity so they can ship software faster, more frequently, with fewer defects. Diffblue’s customers include Citi, ING, Workday, S&P Global, ING, and BNY. To learn more, visit www.diffblue.com.
Media Contacts:
NextWave Consulting
maya.kokerov@nxwave.co.uk
Diffblue
omer.tumer@diffblue.com
May 13, 2025