22 tech companies in Ireland rank among fastest-growing firms in Deloitte EMEA Fast 500
- Highest ranking Irish company StormHarvester places 24th on Fast 500 list
- Ambitious tech companies in Ireland are invited to follow in the footsteps of Irish unicorns by applying for Deloitte Ireland’s 2026 Technology Fast 50 awards
Over 20 technology companies in Ireland have ranked in the Deloitte 2025 EMEA Technology Fast 500, which recognises the 500 fastest-growing technology companies across Europe, the Middle East and Africa, positioning Irish innovators alongside some of the world’s most dynamic tech leaders.
Across all 500 companies and 24 countries, the average revenue growth rate over four years was 1,024.47%. The 22 companies from Ireland were on par at 1,016.48%.
StormHarvester ranked highest among the companies in Ireland, at 24th on the list, with a revenue growth rate of over 3,012.4%.
The Belfast-based company, which has developed an advanced anomaly detection system to help wastewater utilities predict and prevent issues like flooding and pollution, was also the 2025 winner of Deloitte Ireland’s Technology Fast 50.
In the Fast 500 ranking, Irish companies Mail Metrics and Klearcom also placed in the top 100, ranking 54th and 74th, respectively. The companies also came in at second and third in last year’s Deloitte Fast 50 ranking in Ireland.
Mail Metrics provides customer communications solutions to organisations operating in regulated sectors, while Klearcom provides global voice and IVR testing capabilities to organisations with a dependency on customer communication.
In the previous year, 20 companies in Ireland were included in the Fast 500 rankings, with the Irish fintech Wayflyer ranking the highest at number 43.
These results underline the continued strength of Ireland’s indigenous technology sector in a highly competitive global market.
Applications for Deloitte Ireland’s 2026 Technology Fast 50 are now open
The Deloitte Fast 50 is one of Ireland’s foremost technology awards, ranking the country’s fastest-growing indigenous technology companies by revenue growth over four years.
Ireland has been home to approximately 10 technology unicorns, which is a reflection of the strength of the country’s start-up and scale-up community.
Several of these unicorns, including LetsGetChecked, Flipdish, Fenergo, Wayflyer, and Tines, are alumni of Deloitte’s Technology Fast 50 programme, highlighting its strong track record of identifying future high-growth success.
“The Deloitte EMEA Technology Fast 500 continues to highlight the exceptional strength of Ireland’s homegrown tech sector. Behind every one of these companies is a team that chose to push a bit further, a bit faster. For a small island, our entrepreneurs consistently deliver outstanding performances on a global stage, and that’s what this ranking really captures.
“It is also a testament to the critical role domestic direct investment (DDI) 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.
“Applications for the 2026 Fast 50 rankings are now also open, offering an excellent opportunity for ambitious technology companies to join this distinguished group.”
said James Toomey, Fast 50 lead and Deloitte Ireland partner.
“I firmly believe we’re only getting started in Mail Metrics. While we’ve achieved a lot, there is plenty more to come. 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. I pay huge credit to our team and our amazing clients for helping us achieve this.”
said Nick Keegan, founder and CEO of Mail Metrics.
“We’re an organisation that loves data, which is why we’re strongly aligned with the objectivity of the Deloitte Fast 50 awards. We’ve ranked for 5 years in a row, and that is purely based on our revenue growth. It’s a valuable and credible recognition for us when we meet with new clients, and an opportunity for us to pause and celebrate how we’re building our business.”
said Laura Haldane, co-founder and Chief Revenue Officer of SciLeads.
Application details and further information about the programme can be found here: https://www.deloitte.com/ie/en/Industries/tmt/technology-fast-50-awards.html
The closing date for entries is 25 September and the winners will be announced at a ceremony in Dublin on 26 November 2026.
Rank |
Business Name |
24 |
StormHarvester |
54 |
Mail Metrics |
74 |
Klearcom |
143 |
Fibrus Limited |
160 |
Altra |
194 |
Tines |
202 |
Aerlytix Limited |
249 |
OneTouch |
264 |
Halo Technologies Europe Limited |
289 |
Otonomee |
299 |
Concept Apps Ltd (TeamFeePay) |
315 |
EdgeTier |
339 |
Clear Strategy |
372 |
Swoop Finance |
400 |
CATAGEN Limited |
407 |
CleverCards |
427 |
AccountsIQ |
435 |
GRID Finance |
451 |
Circit |
460 |
Tier3Tech Support Ltd |
464 |
MEG |
496 |
Bright |
Notes for the Editor
The EMEA Technology Fast 500 ranking is a benchmark for recognising high-growth companies that are pushing boundaries, scaling fast, and shaping the future of their industries.
The ranking is based on percentage revenue growth over four years, which is taken from the Deloitte Ireland Fast 50 2025 awards.
About Deloitte
At Deloitte, we make an impact that matters for our clients, our people, our profession, and in the wider society by delivering the solutions and insights they need to address their most complex business challenges.
As the largest global professional services and consulting network, with approximately 457,000 professionals in more than 150 countries, we bring world-class capabilities and high-quality services to our clients.
In Ireland, Deloitte has approximately 3,000 people providing audit, tax, consulting, and financial advisory services to public and private clients spanning multiple industries. Our people have the leadership capabilities, experience and insight to collaborate with clients so they can move forward with confidence.
In this press release references to Deloitte are references to Deloitte Ireland LLP. The information contained in this press release is correct at the time of going to press. Deloitte Ireland LLP is the Ireland affiliate of Deloitte NSE LLP, a member firm of Deloitte Touche Tohmatsu Limited, a UK private company limited by guarantee (“DTTL”). DTTL and each of its member firms are legally separate and independent entities. DTTL and Deloitte NSE LLP do not provide services to clients. Please see www.deloitte.com/about to learn more about our global network of member firms.
Media Contact(s):
Declan Jackson
Deloitte Ireland Communications
dejackson@deloitte.ie
+353 1417 3522
Georgina Francis
Deloitte Ireland Communications
gefrancis@deloitte.ie
+353 1584 5459