Zervant

Zervant is a European invoicing and expense tracking software with a generous free plan for unlimited invoices. It streamlines the quote-to-invoice process, allowing you to turn estimates into invoices quickly. It includes expense management, basic reporting, and a mobile app. While its accounting features are lighter than full double-entry systems, it provides a solid foundation for freelancers and sole traders who primarily need to create, send, and track invoices and expenses.

Its free tier is compelling for new businesses, and its paid plans remain affordable. It's a straightforward, no-fuss option for European solopreneurs focused on cash flow basics.