Invoice Ninja

Invoice Ninja is a highly customizable, open-source invoicing platform that offers both a cloud-hosted service and a self-hosted version you can install on your own server. This unique flexibility appeals to developers, IT consultants, and privacy-conscious businesses. Its feature set is extensive, including invoicing, quotes, tasks, time tracking, expenses, and client portals. The white-labeling options are superior, allowing you to completely rebrand the client portal and emails. The open-source (self-hosted) version is free forever, while the cloud-hosted plans are competitively priced. It supports over 50 payment gateways and 40 languages. Compared to proprietary SaaS solutions, it offers unparalleled control and data ownership. Compared to other free tools, its self-hosted version provides enterprise-level features without subscription fees. It's ideal for tech-savvy users, agencies that require white-labeling, or businesses with specific compliance needs that require on-premise hosting.