PrivateInternetAccess (PIA) also has the kill switch option. While it, ExpressVPN, and VyprVPN are all valid choices there are some differences that make me like PIA better.
VyprVPN only allows one connection at a time.
ExpressVPN allows 1 computer, 1 phone or tablet, 1 router and 1 streaming console to be connected at the same time.
PIA allows 5 simultaneous connections and they can be any combination you like of any devices you have.
So to me PIA is much more configurable to various options. PIA is also the least expensive of the three. The cheapest option on VyprVPN doesn't allow OpenVPN and L2TP/IPsec connections, you have to pay more per month for those. PIA does those options and more.
ExpressVPN and PIA both offer some anonymous way of paying, couldn't confirm on VyprVPN since you have to install free trial before you can see payment options. But only PIA also has the option of paying with gift cards. You can literally pay cash at some restaurant or store for a gift card and use it to pay for their VPN service. They accept hundreds of store gift cards as payment. I can't think of more anonymous buying than that.
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The other thing I'll mention is do your own research on reviews, whether or not they keep logs, are truly anonymous or things like that. PIA I found good reviews all over. They connect you to an IP address in a pool of other people so they themselves don't even know which one of you requested what info. They don't keep logs to turn over. Things like that.
VyprVPN however logs your IP and web activity. I'll just post this review on them.
https://www.bestvpn.com/blog/10123/vyprvpn-review/
The fact they [VyprVPN] have that 2 strike rule means they do track what users do and they do keep logs to go back on. I ruled them out instantly from that alone. To me that means they are worthless at any price point.
I've posted this before but here's a good and bad list of VPN services. Notice that both VyprVPN and ExpressVPN are on the bad list. They both log activity, which means they openly admit to having data to turn over. I wouldn't even consider either for that alone. PIA is on the list of good ones, but even if you don't want PIA I'd still do research and choose from among the ones on the good list.
Bad
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Good
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