Tunnelblick

vs

PrivateVPN

OpenVPN Manager is a tool which controls OpenVPN.

OpenVPN is a free and open-source VPN client developed by OpenVPN Inc. The software can be used to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. OpenVPN uses custom security protocol that utilizes SSL/TLS for key exchange and is compatible with any OpenVPN protocol compatible server.

Private Internet Access or PIA for short, has the largest virtual private network capacity across the globe to provide the highest speeds and most encryption. The service prides it self of being privacy-focused and is the only VPN server that has a proven non-log record. Apps provided by Private Internet Access use OpenVPN and WireGuard, two of the latest, most secure protocols. OpenVPN uses AES-128 encryption by default, but you can bump that up to AES-256 in the settings. With Private Internet Access you can also set the data authentication and handshake methods, including RSA-2048 and RSA-4096.

TunnelBear encrypts your internet connection to keep your online activity private on any network. It's one of the few VPN providers in the world that publish regular security audits of their network and applications, by a third-party security auditor.

VPN Unlimited is one of the most secure and highly encrypted VPN services over the internet offering a great amount of protection services to its users.