VPNs with open source clients
21 of 85 providers in the dataset
What this filter checks
A single catalogue criterion is checked. Providers whose clients are fully open source are included, as are those where part is open, for instance the desktop client but not the phone app. Providers without published source code drop out.
Open source first of all only means the source code can be read. It does not mean the file shipped through the app store was built from exactly that source. A different criterion answers that question, namely reproducible builds. Anyone looking for both combines the two rows in the matrix.
The levels confirmed and provider claim count for inclusion. A provider claim suffices here because in the case of open source it is easy to check: a repository is either public or it is not. Where we have looked at the repository ourselves, the level is confirmed.
The rule lives in the source code and is only read out here. It is a condition on catalogue criteria, nothing more.
All of the following conditions must hold.
Open source clients has the value all or some
trust.opensource_clients
Whether the source code of the apps can be inspected. Open code makes independent review possible, but it does not prove that the binary in the app store was built from exactly that code; only reproducible builds show this. Some means, for instance, that the desktop client is open while the mobile app is not.
Which level of evidence counts
For this filter the levels confirmed and provider claim count. Disputed and unsourced cells drop out. Confidence levels in detail
Providers with evidence for this
Sorted alphabetically, as everywhere on this site. There is no order by quality.
- AirVPNno parent company recorded
- Open source clientsconfirmed
all
- GitHub: AirVPN/Eddie, UI/CLI for OpenVPN/WireGuard, GPL-3.0Otherretrieved 08/03/2026
- GitLab: AirVPN/AirVPN-Suite, GPL-3.0-or-laterOtherretrieved 08/03/2026
- GitLab: AirVPN/EddieAndroid, GPL-3.0-or-laterOtherretrieved 08/03/2026
- GitHub: AirVPN/Eddie, UI/CLI for OpenVPN/WireGuard, GPL-3.0
- Amnezia VPNno parent company recorded
- Calyx VPNGroup: Calyx Institute
- Open source clientsconfirmed
all
- Calyx VPN | F-DroidVendor documentretrieved 08/04/2026
- Calyx VPN | F-Droid
- cryptostormno parent company recorded
- Open source clientsprovider claim
some
- Open source / no proprietary code; widget is GUI for OpenVPNVendor documentretrieved 08/04/2026
- Open source / no proprietary code; widget is GUI for OpenVPN
- Open source clientsprovider claim
some
- Encrypt.meVendor documentretrieved 08/04/2026
- Encrypt.me
- ExpressVPNGroup: Kape Technologies
- Open source clientsconfirmed
some
- ExpressVPN auf GitHub, öffentliche RepositoriesOtherretrieved 08/03/2026
- expressvpn_browser_extensionOtherretrieved 08/03/2026
- expressvpn_leak_testingOtherretrieved 08/03/2026
- ExpressVPN auf GitHub, öffentliche Repositories
- Open source clientsprovider claim
some
- VPN by Google One shuts downPressretrieved 08/04/2026
- VPN by Google One shuts down
- hide.meGroup: eVenture Limited
- Open source clientsconfirmed
some
- GitHub: eventure/hide.client.linux, Lizenz GPL-2.0Otherretrieved 08/03/2026
- hide.me: VPN für Linux, Hinweis auf Open-Source-ProjektVendor documentretrieved 08/03/2026
- GitHub: eventure/hide.client.linux, Lizenz GPL-2.0
- IVPNGroup: IVPN Limited
- Open source clientsconfirmed
all
- GitHub-API, Repository-Liste der Organisation ivpnMeasurementretrieved 08/03/2026
- IVPN bei F-DroidOtherretrieved 08/03/2026
- IVPN auf GitHubOtherretrieved 08/03/2026
- GitHub-API, Repository-Liste der Organisation ivpn
- Lanternno parent company recorded
- Open source clientsconfirmed
some
- GitHub - getlantern/lanternVendor documentretrieved 08/04/2026
- Lantern | Unlock the full internetVendor documentretrieved 08/04/2026
- GitHub - getlantern/lantern
- Mozilla VPNGroup: Mozilla
- Open source clientsconfirmed
all
- mozilla-vpn-client GitHubVendor documentretrieved 08/04/2026
- Built transparently in open sourceVendor documentretrieved 08/04/2026
- mozilla-vpn-client GitHub
- Mullvad VPNGroup: Amagicom AB
- Open source clientsconfirmed
all
- GitHub: mullvad/mullvadvpn-appOtherretrieved 08/03/2026
- mullvadvpn-app READMEVendor documentretrieved 08/03/2026
- GitHub: mullvad/mullvadvpn-app
- NordVPNGroup: Nord Security
- Open source clientsconfirmed
some
- NordSecurity/nordvpn-linux, GPL-3.0Otherretrieved 08/03/2026
- NordSecurity/nordvpn-linux, GPL-3.0
- NymVPNGroup: Nym Technologies
- Open source clientsconfirmed
all
- NymVPN featuresVendor documentretrieved 08/04/2026
- Pricing | NymVendor documentretrieved 08/04/2026
- GitHub nymtech/nymVendor documentretrieved 08/04/2026
- NymVPN features
- Obscura VPNno parent company recorded
- Open source clientsconfirmed
all
- obscuravpn-clientVendor documentretrieved 08/04/2026
- Obscura VPNVendor documentretrieved 08/04/2026
- obscuravpn-client
- Open source clientsprovider claim
some
- VPN Client Software (Wayback)Vendor documentretrieved 08/04/2026
- Homepage (Wayback)Vendor documentretrieved 08/04/2026
- VPN Client Software (Wayback)
- Private Internet AccessGroup: Kape Technologies
- Open source clientsconfirmed
all
- GitHub: pia-fossOtherretrieved 08/03/2026
- PIA Open Source VPNVendor documentretrieved 08/03/2026
- GitHub: pia-foss
- Proton VPNGroup: Proton Foundation
- Open source clientsconfirmed
all
- ProtonVPN auf GitHubOtherretrieved 08/03/2026
- ProtonVPN auf GitHub
- PsiphonGroup: Psiphon Inc.
- Open source clientsprovider claim
all
- Psiphon | Open SourceVendor documentretrieved 08/04/2026
- PsiphonVendor documentretrieved 08/04/2026
- Psiphon | Open Source
- RiseupVPNGroup: Riseup Networks
- Open source clientsconfirmed
all
- RiseupVPNVendor documentretrieved 08/04/2026
- RiseupVPN for LinuxVendor documentretrieved 08/04/2026
- RiseupVPN
- Windscribeno parent company recorded
- Open source clientsconfirmed
all
- GitHub-Organisation Windscribe, Top RepositoriesOtherretrieved 08/03/2026
- Pressemitteilung: Windscribe VPN Celebrates 10 Years, 20.04.2026Pressretrieved 08/03/2026
- GitHub-Organisation Windscribe, Top Repositories