StormHarvester, a Belfast-based software provider in the wastewater space, is proud to be named the overall winner in the Deloitte Fast 50 Awards – celebrating the top 50 fastest growing technology companies across the island of Ireland.
Marking 26 years of the programme in 2025, the award is based on revenue growth over a four-year period and recognises StormHarvester’s commitment to transforming how wastewater networks are monitored and managed. By combining advanced machine learning with sector expertise, StormHarvester helps utilities reduce flooding, prevent pollution events, and optimise performance.
“This award is a testament to the impact our technology is having on the industry,” said Brian Moloney, CEO and co-founder of StormHarvester. “Our team has worked tirelessly to support utilities as they navigate increasingly complex environmental challenges. To be recognised in this way is an incredible endorsement of the work we’re doing.”
Cumulatively, the 2025 Fast 50 winners generated €1.76 billion in total annual revenues and now employ over 7,600 people. The average revenue of companies featured in the ranking was approximately €36 million, while the average growth rate of the companies over the last four years was 442%.
StormHarvester
StormHarvester has seen rapid growth over the past year, driven by major utility partnerships, international expansion, and significant series A investment in January of this year. Since then, the company has doubled its headcount and with a now 100-strong team, continues to scale its platform across the UK, North America, Australia and New Zealand.
“We’re proud to represent Belfast on the global stage,” Moloney added. “This recognition reinforces our mission to build resilient wastewater networks and support a more sustainable future.”
Meanwhile, Deloitte Fast 50 lead partner in Belfast, Aisléan Nicholson added: “The Deloitte Technology Fast 50 ranking celebrates innovation and entrepreneurship in the technology sector and recognises tech companies with sustainable revenue growth over four years.
“This data-driven methodology gives the Fast 50 a credibility that sets the programme apart, and highlights not just the buzz around a tech company but also their readiness to scale globally.
“Congratulations to all the companies whose dedication and approach to innovation have earned them a well-deserved place on this year’s list. Particularly to StormHarvester, who are the second Northern Irish company to take the top spot since the programme began 26 years ago.
“Northern Ireland’s reputation as a hub for creative, homegrown technology continues to strengthen, and the achievements of those featured in the Fast 50 showcases the talent, expertise, and vision driving our local tech sector forward.”
