Israel-based Hola isn’t a traditional VPN in which customers connect to a network of centralized servers owned by the VPN company. Instead, Hola users connect to each other, using other users’ idle bandwidth as part of a large peer-to-peer network. Obviously, this comes with some pretty big security and legal concerns. Users could use each other’s internet for illegal activity, for example. In 2015, Hola used its user’s computers to create a botnet and perform a massive distributed denial-of-service (DDoS) attack. The abuse of customers’ trust happened entirely without their knowledge.
Just a small remark. If you use vpn.ac take in consideration that the jurisdiction looks great only on paper. I live in Romania and I can say if you‘re doing just regular work this VPN will not only be all right, it will be a lot better than your number 1 listed. The speeds I had with vpn.ac were absolutely amazing. In Romania the web industry is well developed so we get usually over 100 Mbps on a basic home connection (premium, business or platinim go up to 500 Mbps!!), even better on smartphones, no matter where you are in the country. So vpn.ac has to keep up with these insane speeds. BUT: if you try to fly under the radar (like let‘s say journalism) I won‘t go with vpn.ac. Don‘t forget they retain logs. The people who work for vpn.ac are to admire, but unfortunately the jurisdiction won‘t offer you a high level of privacy.
VPNs are primarily used to keep a shred of privacy while navigating the internet in an age where your every move is monitored. Search engines love to keep track of you for marketing purposes, and your ISP might even be using your browsing history to make a bit of profit. A VPN effectively blocks that from happening, and it can even help get past government restrictions if you're living in a less-than-free country. If you travel or frequent coffee shops, Wi-Fi hotspots can be easily compromised, but a VPN will keep your data safe.
OpenVPN: OpenVPN is very secure, open-source and widely used. Most VPN services support it, but except for Chrome OS and Linux, few operating systems do. This protocol can be used in either TCP (web) or UDP (streaming) mode; the latter is sloppier but faster. You'll need either the VPN service's client software or one of the many free alternatives. Either way, you'll still need to pay for the VPN service.
CyberGhost has been around since 2011 and has come out strongly as a supporter of "civil rights, a free society, and an uncensored Internet culture." We really liked how the company specifically showcases, on their Web site, how folks normally prevented from accessing such important services as Facebook and YouTube can bring those services into their lives via a VPN.