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Etebase is an open-source backend and client ecosystem for building applications that synchronize end-to-end encrypted personal data. It targets developers who need encrypted collections, authentication, synchronization, and sharing without exposing user data to the server.
💡 Pick it when you need ready-made encrypted calendar, contact, and task sync instead of building a custom data app.
EteSync is an end-to-end encrypted and secure solution for your contacts, calendars, and tasks.
Free for personal use. Paid plans available for businesses.
💡 Pick it when you need a full self-hosted personal cloud with files, calendars, contacts, and collaboration.
Nextcloud is a self-hosted file sync and share server designed to be easy to use and secure.
Free and paid plans available
💡 Pick it when private collaborative documents matter more than embedding encrypted sync into your own application.
CryptPad is a privacy-focused online collaboration platform that allows users to work on documents, spreadsheets, presentations, and more while ensuring end-to-end encryption.
Freemium model with paid plans available
💡 Pick it when you want a polished encrypted notes app rather than an infrastructure toolkit for building your own product.
Encrypted note-taking app with a focus on privacy and security.
Free with optional premium features
Proton AG
💡 Pick it when you need convenient encrypted file storage and synchronization rather than a self-hosted application backend.
Proton Drive is an end-to-end encrypted cloud-storage service for individuals and teams. It provides encrypted file storage, sharing links, and document editing...
Freemium, paid from $4.99/mo
💡 Pick it when business-grade encrypted file sharing, administration, and compliance controls outweigh open-source flexibility.
Tresorit is a secure cloud storage solution that encrypts your files and provides end-to-end encryption for maximum data security.
Starting from $10.42/month
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