Four top VPNs share your data with marketing software – and we worked out if you're at risk

Floating eyeballs watching a red laptop.

VPNs are a vital tool for protecting our privacy online. They encrypt our data, protect it from dangerous third-parties, and often come with a host of additional cybersecurity features.

But recently there has been some concern surrounding the best VPNs and the implementation of the marketing analytics software, AppsFlyer.