Proton VPN

1. Free tier:

- Proton VPN offers a free plan with no data limits

- NordVPN only has paid plans

2. Reputation:

- Has not had major security incidents

- NordVPN experienced a server breach in 2018 (though they've since improved security)

3. Integration with other Proton services:

- Works seamlessly with ProtonMail, Proton Calendar, and Proton Drive

- Offers a unified ecosystem for privacy-conscious users

4. Transparency:

- Proton VPN is more transparent about its ownership and operations

- All apps are open-source, allowing for independent security audits