The Technology Group, Leeds
Since it was founded in 2011 by Richard, Jonathan and David Marsden, the telephony, internet and mobile firm has secured clients including NHS Leeds and Specsavers.
Last year, the firm acquired Hertfordshire-based telecommunications business Exchange Comms for an undisclosed amount.
It now employs around 30 people across three offices in Leeds, London and Welwyn Garden City and generated a turnover of £2.6m in 2017 with a projected double growth to £5m in 2018.
Check out our '101 Yorkshire and Humberside’ list for more tech stars from the region.