BILLY

BILLY is a Liège-based online accounting firm for Belgian self-employed professionals and small companies, pairing an accounting app with a dedicated accountant.

2013 Founded2 People on the graph8 News mentions

Overview

BILLY is an online accounting firm for self-employed professionals and small businesses in Belgium. It pairs an accounting application with a dedicated accountant reachable through unlimited live chat. Services cover real-time accounting, electronic invoicing via Peppol, bank synchronisation, VAT, personal and corporate tax declarations, balance sheets and company creation for SRL, SComm and SA structures. Annual plans cost €55 per month for self-employed without VAT, €60 with VAT and €165 for companies. The legal entity, BILLY.TECH SRL, was registered on 19 December 2013 and is based at Rue Joseph Dupont 75 in Chaudfontaine, near Liège. Lionel Rosu is CEO and co-founder and holds 70% of the company; Olivier Calvaer is co-founder. Rosu has been permanent representative of the company's director since 2019. The firm is ITAA certified, with certified accountants Maud Wauthoz, Olivier Calvaer, Lionel Rosu and Julien Louis, plus 7 trainee accountants. BILLY employs 55 people and serves more than 3,500 clients, adding around one hundred per month. Its clients include doctors, lawyers, architects, physiotherapists, journalists and consultants, and it covers Brussels, Liège, Charleroi, Namur, Mons and Huy. The company took no external tech investors and raised about €1.5 million from family, public aid, bank loans, tax shelter and regional loans. Revenue reached €2.4 million in 2024, with targets of €3.6 million for 2025 and €5 million for 2026, and an expansion into Flanders in preparation.

Funding history

  • Non-VC financing: About €1.5M in total from family, public aid, bank loans, tax shelter and regional loans; no external tech investors

Stated facts & numbers

  • Founded: 2013 (registered 19 December 2013)
  • Legal entity: BILLY.TECH SRL, company number 0543.450.814
  • Headquarters: Chaudfontaine (Liège)
  • CEO: Lionel Rosu (co-founder, 70% owner)
  • Co-founder: Olivier Calvaer
  • Employees: 55
  • Clients: 3,500+ Belgian self-employed and small companies
  • Revenue 2024: €2.4M
  • Total raised: About €1.5M, no external tech investors
  • Certification: ITAA certified accountancy firm

Leadership & org chart

In the news

Alumni 1 went on to found or lead

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