Tired of $10/user/month project tools holding your data hostage? MasterGantt is a Project management tool with a different approach: single 1 MB file. Open it in your browser. That's it. No cloud. No install. No account. No subscription. Your data, your machine, full sovereignty. Gantt, Kanban, budget, resources, risks, +250 features, ok offline. Collaboration? AES-256 end-to-end encrypted via your own worker. The server can't read anything. €49 one-time. Perpetual license. FR/EN/ES/DE.