You can use SimpleBackups to back up your managed or remote database without having to use your own server. This type of database backup is called Serverless/Remote Backup.
Step 1: Create a new backup
Start by creating a new database backup.
Step 2: Choose backup server type
Under the Server section, choose Serverless backup worker then, if not enabled, click on the Enable button as shown.
Step 3: Choose the database type
Under the Database section, choose the Type of your database. If you are behind a firewall, you may check the Behind a firewall toggle below to see which IP addresses you need to whitelist on your database. You may also see the full list of IP addresses you may need to whitelist.