DigitalDam is described as 'Schedule automatic DigitalOcean snapshots, with flexible retention rules, while also scheduling MySQL backups through the same interface and optionally storing file and MySQL backups off-site on any server that supports SFTP protocol' and is an app in the Backup & Sync category. There are four alternatives to DigitalDam for Online / Web-based, SaaS and Linux. The best alternative is Bakup.io, which is free. Other great apps like DigitalDam are SnapShooter (Paid), Weap.io (Paid) and BackupSheep (Freemium).
Bakup.io is a fully managed solution for database, file and server backups. The platform interacts with your cloud servers and automatically performs backup jobs for you. Support for server snapshots, data management and enterprise access.
Better DigitalOcean Snapshots, with hourly to daily snapshots of droplets and volumes. An unlimited number of past backups and daily, weekly and monthly retention policies. Must better than DigitalOceans backup service