St. John’s-based Verafin, which makes anti-fraud and anti-money-laundering software, announced Thursday it has signed a formal partnership with Open Solutions Inc., a Connecticut company that makes systems that process banking transactions.

The Newfoundland company said in a statement the partnership will bring its converged fraud detection and anti-money laundering solution to customers of Open Solutions’ on-demand and on-premise core banking solutions.

“We have always had the pleasure of a great relationship with Open Solutions,” said Verafin CEO and co-founder Jamie King. “We’re very excited to take our relationship to the next level with a more formal partnership that will be mutually rewarding to both organizations.”

Verafin last month took the 27th position in prestigious 2011 Deloitte Tech Fast 50, which said the company had attained an 840 percent growth in revenues over five years.

Having launched more than eight years ago, Verafin booked its 700th customer in July and is due to crack the 800-client mark this year, Brendan Brothers, a co-founder and head of technical sales, said last month.

The company’s last fundraising was a $5.5 million round in September 2009 led by new investor RBC Venture Partners and including existing investors Killick Capital and Jamfin Inc., both of St. John’s.