Tarsnap is a secure online backup service for UNIX-like operating systems, including BSD, Linux and OS X. Developed by Colin Percival
License: Commercial
Tarsnap is known for its strong security and pay-per-use pricing, making it ideal for users who prioritize data protection and only want to pay for what they use. In contrast, SpiderOak offers a more user-friendly experience with strong syncing features, but it comes at a higher price point.