Almost all of MonsterWriter's back end is open source

MonsterWriter’s back end is almost entirely open source, providing writers and developers with a modular, transparent tool for organizing complex writing projects like novels or research papers. It is designed for authors who want full control over their workflow without vendor lock-in, allowing them to inspect, modify, or self-host the core software. This approach is interesting because it combines the structure of a dedicated writing app with the flexibility and community-driven improvement of open-source development.