Yes, both BackupSheep and Backblaze offer a Free Trial.
BackupSheep is designed for Freelancers, Medium Business and Small Business.
Backblaze is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for BackupSheep Starts at $25/Month whereas for Backblaze Starts at $7/Month.
Some top alternatives to BackupSheep includes Carbonite, Backblaze, SimpleBackups, BackupVault Cloud Backup, NovaBACKUP Cloud, Handy Backup, IBackup, BDRSuite, Bakup.io and AWS Backup.
Some top alternatives to Backblaze includes Carbonite, BackupVault Cloud Backup, CloudAlly Office 365 backup, IDrive Online, Livedrive, Jungle Disk Encrypted Cloud Backup, Data Deposit Box, CloudAlly G Suite Backup, IBackup and AWS Backup.