Tarsnap is a secure online backup service for UNIX-like operating systems, including BSD, Linux and OS X. Developed by Colin Percival
License: Commercial
CrashPlan offers a user-friendly interface with automatic backups and strong customer support, making it ideal for individuals and small businesses. In contrast, Tarsnap is designed for more technical users, providing strong encryption and pay-as-you-go pricing, making it suitable for long-term data storage and developers.