SOFTWARE LICENSE GUIDE
Proton VPN
Proton VPN is a secure VPN service with open-source client applications. Its official client applications are open source under the GPLv3 license.
What it does
It encrypts internet traffic and routes it through secure servers, enhancing online privacy and security for users.
Who it may suit
Individuals seeking enhanced online privacy and security through a VPN service, particularly those who value open-source software and independent security audits.
Free tier and license
Proton VPN typically offers a free tier for its service. The client applications themselves are open source. Specific free tier limits should be checked in official documentation.
Limitations to check
While the client applications are open source, the VPN service itself may have free tier limitations (e.g., speed, server locations, data limits) or require paid subscriptions for full features. Check official documentation for service limitations.
Licensing notes
All official Proton VPN client applications are open source under the GPLv3 license, with publicly available source code. The VPN service itself may have different subscription models.
Verification details
Last licensing verification recorded: 2026-10-28.
Directory record last updated: 2026-08-19. These are separate dates: a record update does not necessarily mean the publisher's terms changed.
AI-assisted summaries may be incomplete or outdated. Confirm licensing, pricing, and commercial-use rights in the official sources before making a business decision.
Frequently asked questions
Are Proton VPN client applications open source?
Yes, all official client applications are open source under the GPLv3 license.
Is the Proton VPN service entirely free?
While the client applications are open source, the VPN service typically offers a free tier with limitations and paid subscriptions for full features. Check official documentation.
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