OpenSSH is the premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking. Developed by Theo de Raadt
License: Open Source
OpenSSH is a powerful, open-source tool primarily for secure shell access and file transfer, appealing to technical users who favor command-line interfaces. In contrast, ZOC offers a more user-friendly experience with multiple protocol support and advanced features, but requires a paid license.