These VPN providers have undergone third-party, public audits:
More Details on VPNs With Public Audits
Mullvad: Annual Public Audits
Mullvad is consistent in conducting annual audits. In May 2022, Mullvad underwent a comprehensive security audit. Assured, a cybersecurity consulting firm, conducted it. The most recent infrastructure audit took three testers a total of 19 days to complete. The auditors spotted 20 vulnerabilities, implementation issues, and other findings: 11 of medium severity and nine of low severity.
Located in Sweden, Amagicom is the company behind Mullvad’s service. Amagicom is directly owned by founders Fredrik Strömber and Daniel Berntsson.
Surfshark: White-Box Instructure Audit
Surfshark kept details of its leadership private, but then made them public in 2021. Surfshark also recently conducted a white-box infrastructure audit. Surfshark’s price includes the ability to use Surfshark on an unlimited number of devices.
TunnelBear: Multple Security Audits
NordVPN: Audits Of Apps Only
NordVPN has undergone a series of third-party audits for its apps by VerSprite (a cybersecurity consulting firm). These audits did not include NordVPN’s infrastructure. NordVPN makes these audit reports available only to existing subscribers.
ProtonVPN: Open-Source Apps
VPN With No Public Audits
These VPNs had no recent public audits:
AirVPN, Astrill, AzireVPN, blackVPN, BTGuard, CactusVPN, Cryptostorm, CyberGhost, Disconnect, Faceless.me, FrootVPN, F-Secure Freedome VPN, Goose VPN, Hide.me, InvinciBull, IPredator, IPVanish, KeepSolid, nVpn, OVPN, Perfect Privacy, personalVPN, PrivateVPN, Private Tunnel, Private Internet Access, PureVPN, SurfEasy, TorGuard, TorrentPrivacy, Trust.Zone, VPN.AC, VPN.ht, VPNTunnel, Windscribe, ZenGuard/ZenMate, and ZorroVPN.
Other VPN Trust Issues
PureVPN appears to have lied about its logging practices.
ProxySH was discovered to be spying on customer traffic in 2013.
HideMyAss has handed customer information over to the police.
The Center for Democracy & Technology filed a 14-page complaint about Hotspot Shield with the FTC, alleging unfair and deceptive trade practices.