StormHarvester tops Deloitte’s 2025 Technology Fast 50 with 2,910% growth as AI-driven firms dominate Ireland’s tech sector. Protex AI wins Rising Star Award.
StormHarvester has claimed the number one position in Deloitte’s 2025 Technology Fast 50 ranking, posting revenue growth of 2,910% over four years.
The Belfast-based company, which helps utilities predict and prevent flooding and pollution through advanced anomaly detection, was announced as the fastest-growing technology firm at a ceremony in Dublin’s Mansion House on Thursday evening.
“The combined €1.76 billion in revenues generated by these 50 indigenous companies is a powerful symbol of the exceptional talent and innovative thinkers we have in Ireland”
Founded by Brian Moloney, StormHarvester began as an idea in Australia more than a decade ago and has evolved into a business employing dozens of people.
StormHarvester develops AI-driven water management solutions to help utilities predict and prevent flooding and pollution. Its platform uses machine learning and hyperlocal rainfall forecasting, serving 75% of UK wastewater utilities. In January 2025, the company secured €9.8 million (£8.4m) in Series A funding from YFM Equity Partners and Emerald Technology Ventures to double its workforce and expand into North America and Australasia.
“Achieving the top spot in Deloitte’s Fast 50 ranking is a really special moment for all the team,” Moloney said. “In the last year alone, our funding has enabled us to double our headcount, which will help us fuel our expansion further and create even more exciting opportunities in Ireland.”
AI is changing everything
The Deloitte Technology Fast 50, now in its 26th year, ranks Ireland’s fastest-growing tech companies based on revenue growth over a four-year period. Previous winners include Wayflyer and Swoop.
This year’s cohort generated €1.76 billion in combined annual revenues, with an average growth rate of 442%. The 50 companies employ more than 7,500 people, and 12 of them are first-time entrants.
James Toomey, partner and Fast 50 lead at Deloitte Ireland, said the results underscore the resilience of Ireland’s tech sector.
“The combined €1.76 billion in revenues generated by these 50 indigenous companies is a powerful symbol of the exceptional talent and innovative thinkers we have in Ireland,” he said. “A standout from this year’s awards is that companies with Artificial Intelligence embedded in their operations are seeing the biggest growth, but access to skilled employees who can prompt and deploy AI effectively will be crucial.”
Alongside the main ranking, Deloitte presented several special awards. Protex AI, which uses artificial intelligence to improve workplace safety and operational efficiency, received the Rising Star Award in association with Enterprise Ireland.
“Since founding Protex AI, our mission has been to enable organisations to use data-driven insights to drive safer workplaces and unlock meaningful operational efficiencies,” said Dan Hobbs, co-founder and chief executive.
“The growth of our team and client base has made achievements like this possible, and we are thrilled to celebrate receiving the Deloitte Fast 50 Rising Star Award.”
The winners of the awards this year were:
|
Award |
Winner |
| Growing new technology in association with Google
This award recognises a company that has created or introduced a new or innovative product or service to international markets, which helped grow their business over the last four years. |
Aerlytix |
| Advocate for Women in Tech in association with NetSuite
This award recognises an individual who has demonstrated through their actions that they are an advocate for increasing participation by the promotion of women in the technology sector. |
Jac Dunne, CEO, Dimply |
| Impact Award in association with Meta
This award recognises a company that has made a significant impact within the current year. |
Alchemy |
| Scale Up Award in association with Scale Ireland
This award recognises a company that has demonstrated an impressive ability to scale up/expand overseas over the last four years. |
Mail Metrics |
| Financial Services Innovation Award in association with Financial Services Ireland
This award recognises a company with an innovative product or services that is having a disruptive impact within the financial services industry. |
GRID Finance |
| Rising Star Award in association with Enterprise Ireland
This award is given to a company who demonstrates a promising growth trajectory and the potential for inclusion in the Fast 50 rankings in years to come. Companies being considered for this award have operating revenues accounting for a minimum of two years and less than four years. |
Protex AI |
| Alumni Award
This award recognises a company that has played a major part in the Fast 50 programme. |
FINEOS |
Top image: Brian Moloney, Founder and CEO, StormHarvester, and James Toomey, Fast 50 lead and Deloitte Ireland partner. Photo: Brian Morrison
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