Belfast’s StormHarvester ranked highest among Irish entries, reaching 24th position.
StormHarvester, Mail Metrics and Klearcom are among 22 companies from the island of Ireland that made it onto Deloitte’s list of the 500 fastest growing technology companies in Europe, the Middle East and Africa for 2025.
Belfast’s StormHarvester ranked highest among the Irish entries, reaching 24th. The 2012-founded business has developed an AI anomaly detection system that enables wastewater utilities to predict and prevent issues such as flooding and pollution.
Its ranking in the latest Deloitte EMEA Technology Fast 500 comes after being named the fastest growing tech company in Ireland last year by the global multinational.
Other ranking businesses in Deloitte’s latest Fast 500 include automation company Tines and aviation analytics firm Aerlytix.
The four-year average revenue growth rate across all 500 ranking companies spread over 24 countries was 1,024pc. Comparatively, the ranking Irish companies hit an average of 1,016pc revenue growth during the same period. StormHarvester showed a revenue growth rate of 3,012pc.
Mail Metrics provides customer communications solutions to organisations operating in regulated sectors, while Klearcom provides global voice testing capabilities to organisations with a dependency on customer communication.
“Being recognised as one of the fastest growing technology companies in the Deloitte EMEA Fast 500 for two years in a row is an incredible recognition, benchmarking our success against leading tech companies across the globe,” said Nick Keegan, the founder and CEO of Mail Metrics.
Mail Metrics and Klearcom also previously came in second and third in last year’s Deloitte Fast 50 ranking.
Last year, 20 companies in Ireland were included in the Fast 500 rankings, with fintech Wayflyer ranking the highest of those at 43rd.
“For a small island, our entrepreneurs consistently deliver outstanding performances on a global stage, and that’s what this ranking really captures,” said James Toomey, a Fast 50 lead and Deloitte Ireland partner.
“It is also a testament to the critical role domestic direct investment plays in the resilience of the wider economy, and the importance of having supports in place that help more companies like these grow and scale. Congratulations to all the companies in the rankings.”
Here’s a list of the ranking Irish and Northern Irish businesses in order of their appearance on the Deloitte EMEA Fast 500 list:
StormHarvester (24); Mail Metrics (54); Klearcom (74); Fibrus (143); Altra (160); Tines (194); Aerlytix (202); OneTouch (249); Halo Technologies (264); Otonomee (289); TeamFeePay (299); EdgeTier (315); Clear Strategy (339); Swoop Finance (372); Catagen (400); CleverCards (407); AccountsIQ (427); Grid Finance (435); Circit (451); Tier3Tech Support (460); Meg (464); and Bright (496).
Don’t miss out on the knowledge you need to succeed. Sign up for the Daily Brief, Silicon Republic’s digest of need-to-know sci-tech news.

















You must be logged in to post a comment Login