Private Internet Access is a popular US-based VPN provider with an emphasis on speed and privacy. Private Internet Access has good review ratings across multiple review sites. They offer: No Logging policy, 7 days money-back guarantee, dedicated mobile apps, anonymous payment with Bitcoin and gift cards, servers in 25 countries and up to 5 devices on one account simultaneously.
The popularity of Private Internet Access comes from their service quality and excellent price: $39.95 for the yearly subscription.
Private Internet Access also offers multi-hop connections, a SOCKS5 proxy and ad blocking.