Sumary Raises $25M Seed Round for AI Accounting Software

Quick Reads
- Sumary raised $25 million, which it calls Europe’s largest seed round for accounting software, led by Singular.
- Sumary says Europe’s largest accounting firms already use its software, including Deloitte, Grant Thornton and Baker Tilly.
- A team of 11 engineers built it with no product managers, no handoffs and no frontend/backend split, and the company is hiring in Copenhagen and London.
Sumary $25M Seed Round: Sumary, a Copenhagen-based AI accounting startup, has raised $25 million in what it calls Europe’s largest seed round for accounting software. Co-founder Lucas Rantzau announced the round in a post on X, saying the company rebuilt its team, product and processes around AI instead of adding AI to an old setup.
Who backed Sumary’s $25M seed round?
Singular led the round. Existing investors byFounders, Partech and Tenity invested again after backing Sumary’s pre-seed round.
The post also names operators who joined as backers, including leaders from Linear, Qonto, Dust, Synthesia, Public and Omnea. Steve Anavi of Qonto and Ben Freeman of Omnea are named directly. The post describes them as builders who have “written a few playbooks of their own.”
How is Sumary building software differently?
Most companies are adding AI to old teams, products and processes, the post argues. Sumary says it did the opposite: it “threw out the SaaS playbook” and rebuilt all three around AI.
There are no product managers, no handoffs, no frontend/backend split and barely any hierarchy. Instead, builders own a problem from customer pain point to production. The post sums up the model in one line: “Agents do the execution. People do the judgment.”
The team is 11 engineers, including a research team of ML and math PhDs, which the post calls the most talented group its author has worked with.
Which firms already use Sumary?
According to the post, some of Europe’s largest accounting firms already run on what Sumary has built, including Deloitte, Grant Thornton and Baker Tilly. The post argues that finance deserves a first-principles redesign rather than “another chatbot bolted onto the side.”
What happens next?
Sumary plans to use the money to sell to large firms across the Nordics and the UK, and next in the Benelux, per TrustList. It is hiring in Copenhagen and London. The company has said it will show what the team has shipped on Thursday, November 12.





