GMvault vs Synology Active Backup for SaaS

GMvault backs up Gmail accounts to help preserve email correspondence and can restore a local email repository to Gmail. It offers full synchronization as well as incremental quick synchronization. The tool runs from the command line and is described as user-friendly. XOAuth is enabled by default as the recommended sign-in method; its token is stored in $HOME/.gmvault after first authentication. Users can alternatively sign in with a Gmail password, which is encrypted if they choose to save it. Emails are stored by default in $HOME/gmvault-db, or %HOME%/gmvault-db on Windows. Restore operations include --resume and --restart options for avoiding re-upload of emails already processed. GMvault is free and open source under GNU-AGPL-3.0, with Linux, macOS, and Windows support. The project documents binary installs for those systems and installation from source through Python setup.py, pip, or easy_install. PyPI lists version 1.9.1, published March 31, 2016.

Synology Active Backup for SaaS backs up Microsoft 365 and Google Workspace data to Synology NAS servers for recovery after data loss or service downtime. Microsoft 365 coverage includes OneDrive for Business, SharePoint Online, Exchange Online, and Teams. Google Workspace coverage includes Drive, Gmail, Contacts, and Calendar, including shared drives, labels, and attachments. Microsoft 365 backups can run continuously, manually, or on a schedule; continuous intervals adjust from one to ten minutes based on detected API request rates. Both services support file versioning, and Google Workspace versions can be retained for a chosen period or kept in full. The Microsoft 365 Recovery Portal lets administrators and employees restore or export backed-up data, with self-service access dependent on configuration. The product is a free add-on for a compatible Synology NAS, with unlimited accounts subject to NAS storage capacity. Active Backup for Microsoft 365 requires DSM 6.1-15217 or later. Deduplication requires an x64 NAS using Btrfs, and neither service supports secondary backups. Google Workspace setup requires configuring the Drive SDK API and creating a service key.