Is openvpn open source or not?

[rajegworks.mobi]

Is  openvpn open source or not?  , I saw this link    https://openvpn.net/index.php/access-server/pricing.html  they only provide  "2 free client connections for testing purposes." other wise cost.  can anyone suggest free  site-to-site vpn connection.

[cmb]

It's open source. What you're looking at there is their Access Server product, which isn't free nor open source. It's an alternative to the server-side component that's in pfSense. The only client you need is free and open source.
https://openvpn.net/index.php/open-source.html