Encrypted, deduplicated backups for your cloud drives and local files.

Cloudstic is a content-addressable backup system that creates point-in-time snapshots of Google Drive, OneDrive, and local directories. Every backup is encrypted with AES-256-GCM, deduplicated at the chunk level, and stored on your own infrastructure or Backblaze B2.

Open-source command-line tool. Back up, restore, diff, and manage retention policies from your terminal.

brew install cloudstic/tap/cloudstic
cloudstic init -encryption-password "my passphrase"
cloudstic backup -source gdrive-changes

• Encrypted by default (AES-256-GCM with password, platform key, or recovery key)
• Content-defined chunking with deduplication across sources
• Incremental backups via the Google Drive Changes API
• Retention policies (keep-last, hourly, daily, weekly, monthly, yearly)
• Restore any snapshot to local disk

Managed backup service. Same engine, zero ops — scheduling, storage, and retention handled automatically.

• User Guide — installation, commands, encryption, retention
• Specification — object types, HAMT structure, backup/restore flow
• Source API — source interface and how to add new providers

The CLI is released under the MIT License.