"ProtonMail, the world’s largest encrypted email provider, is announcing today the immediate worldwide release of ProtonVPN, an innovative new VPN service built in response to increasing online surveillance and threats to net neutrality.
A VPN (Virtual Private Network) allows users to browse the web without being tracked, bypass online censorship blocks, and also increases security by passing all internet traffic through a strongly encrypted tunnel. In order to make this technology more accessible, the Company will also provide a free version of the service."
https://protonvpn.com/blog/launch-press-release/
They'll use the freemium model. You can get more features if you wish to pay, but the free service may be sufficient for some folks out there.
Check out the pricing here: https://protonvpn.com/pricing