The VPN market moves very fast. In a short space of time, a VPN provider can significantly expand its server network, completely change its privacy policy, or add a host of shiny new features.

Of course, not all developments are for the better, and one VPN that improves its offering may come to the detriment of others that fall down the pecking order as a result. The constant state of change is one of the reasons we test (and retest) VPNs regularly.