Sumary, a Copenhagen-founded startup that builds AI software for accounting firms, has raised $25M in a seed round led by Singular.

Existing investors byFounders, Partech and Tenity also took part. Angel investors include Steve Anavi of Qonto, Tuomas Artman of Linear and Steffen Tjerrild of Synthesia.

Sumary said it is the largest seed round for an accounting software company in Europe, and it comes less than a year after a $4.2m pre-seed round in November 2025, which byFounders led.

Pascar Sivam, co-founder and CEO of Sumary, said: “Accounting firms are being asked to do more with fewer people. Software has to take on the preparation properly, so accountants can give their time to the people who depend on them: their clients and their own teams. That is what we have built. This round lets us bring that to firms across the UK and Europe much faster.”

Sumary's software runs the core tasks of an accounting firm, such as the monthly close, VAT returns and year-end preparation. It works across each client's existing bookkeeping system, and an accountant reviews and signs off each step.

Firms using Sumary for three months spend 50% less time on a monthly close, and 75% less on a VAT return, the company said.

A research team in Copenhagen has built a benchmark of real accounting work. Sumary uses it to test which AI models are best at each task before they handle a client's books.

The company said it now works with most of the 20 largest accounting firms in the Nordics. Its customers include Deloitte, Grant Thornton and Baker Tilly, and it has signed contracts with large UK firms it did not name.

“Sumary's AI and accounting workflows are a superpower every accountant deserves,” said Mads Fauerskov, a partner at Deloitte.

Europe's accounting firms earn an estimated €133bn a year in fees, but much of their work is still done by hand, according to Sumary. Firms also face staff shortages and pressure to serve more clients without hiring more people.

Sumary will use the capital to grow across Europe, with London becoming its commercial hub, while Denmark remains the base for its technology and AI research.

Chief executive Pascar Sivam and chief operating officer Frederik Skov Wacher are moving to London, and the company is also expanding into Benelux.

“We want to offer existing accounting firms the chance to deliver customer value that is as good as, if not better than, these new entrants, by adopting AI quickly across their operations. With the right technology, they can lead this transformation rather than be disrupted by it,” said Pascar Sivam.

Sivam co-founded Sumary with Bastian Schneider, who, like him, is a former McKinsey consultant, as well as Lucas Rantzau, Frederik Hvilshøj and Wacher.

“Sumary has one of the strongest founding teams we have seen in Europe at this stage, and their commercial momentum is exceptional,” said Jeremy Uzan, general partner at Singular.