Berlin-based Integral raises €18 million to deliver AI-run accounting, tax and payroll services to SMEs

Berlin-based AI services firm Integral has secured €18 million in Series A funding, raising its total capital to over €30 million since its inception less than two years ago. The round was led by Mosaic Ventures and Reid Hoffman, with additional investment from Cherry Ventures, General Catalyst, and Puzzle Ventures. In November 2025, Integral acquired cleverlohn, a German digital payroll and HR provider, following a €6.3 million raise in February 2025.

Integral's technology combines licensed tax professionals and AI engineers to deliver AI-run services for accounting, tax, and payroll management, targeting small and medium-sized enterprises (SMEs). The AI agents handle tasks that would typically require an entire tax and accounting team, such as reconciling invoices, creating account postings, and preparing payroll runs and tax filings.

These agents can even prepare the books end-to-end for over 50% of clients, significantly reducing the average monthly accounting turnaround time from weeks to hours.

The company's AI agents operate under the oversight of licensed professionals, who review and sign every filing. Integral is a recognized public audit firm under the German Public Accountant Act and adheres to GDPR requirements, ensuring client data is processed securely in European data centers with strict access control and confidentiality measures.

Reid Hoffman, a co-founder and partner at Mosaic Ventures, emphasizes that Integral's AI agents amplify what licensed professionals can do, rather than replacing them, particularly in a highly regulated industry like accounting and payroll.