Holded

Holded is a Spanish 'ERP for small businesses' that combines accounting with CRM, project management, and inventory. Its accounting module handles invoicing, expenses, bank synchronization, and reporting. The power lies in having all business operations-from client contact to project delivery to accounting-in a single, integrated platform. The interface is visually appealing and dashboard-driven.

While it can be more than a pure solopreneur needs, it's an excellent choice for freelancers who manage complex projects with multiple clients and vendors, or who anticipate building a team. It offers a unified system to avoid disjointed apps and data silos.