InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments. Developed by Kovah
License: Open Source
InvoicePlane is primarily focused on invoicing and billing, offering a user-friendly interface and customizable options, making it suitable for small businesses and freelancers. In contrast, Avaza provides a comprehensive project management solution with strong invoicing capabilities, making it ideal for teams that require collaboration and project tracking.