Founded in 2013, this Cardiff-based IT development and operations business counts government departments and blue chip clients among its main clients – including Admiral, ASOS, BAE Systems, Defra, Nokia, Fitness First, Waitrose and Travelodge.

DevOpsGuys recently won a massive new contract with the DVLA worth more than £10m. It improves the speed, efficiency and quality of software no matter what the industry.

See more of our 101 tech start-up disrupters here.

And check out our 101 rising stars of tech - the exciting firms which did not make the main list but have the potential to grow.