| Comparison | PPTP | L2TP | OpenVPN | IPSec | 
|---|---|---|---|---|
| VPN Encryption | 128-bit | 256-bit |  160-bit  256-bit  | 
                 256-bit |- | 
            
| Manual Setup Supported |  Windows  Mac OS X Linux iOS Android DD-WRT  | 
                 Windows  Mac OS X Linux iOS Android  | 
                 Windows  Mac OS X Linux iOS Android  | 
                 Windows  Mac OS X Android  | 
            
| VPN Security | Basic encryption | Highest encryption. Checks data integrity and encapsulates the data twice. | Highest encryption. Authenticates data with digital certificates. | Highest encryption. Authenticates data with digital certificates. | 
| VPN Speed | Fast due to lower encryption. | Requires more CPU processing to encapsulate data twice. | “Best performing protocol. Fast speeds even on connections with high latency and across great distances.” | Best performing protocol. Defeats deep packet inspection. Fast speeds; even on connections with high latency and across great distances. | 
| Stability | Works well on most Wi-Fi hotspots very stable. | Stable on NAT-supported devices. | Most reliable and stable; even behind wireless routers; on non-reliable networks; and on Wi-Fi hotspots. | Masks VPN traffic so it cannot be identified as a VPN connection (via deep packet inspection) and blocked. | 
| Compatibility | Native in most desktop; mobile device and tablet operating systems. | Native in most desktop; mobile device and tablet operating systems. | Supported by most desktop computer operating systems and Android mobile and tablet devices. | Supported by most desktop computer operating systems and Android mobile and tablet devices. | 
| Conclusion | PPTP is a fast; easy-to-use protocol. It is a good choice if OpenVPN isn’t supported by your device. | L2TP/IPsec is a good choice if OpenVPN isn’t supported by your device and security is top priority. | OpenVPN is the recommended protocol for desktops including Windows/Mac OS X/Linux. Highest performance - fast | secure and reliable.”, “Chameleon is great for VPN users being blocked in countries such as China, or if you are experiencing speed issues due to bandwidth throttling.” | 
Technical features
{{cite web |url=https://www.acevpn.com
 "title=Fast, Secure, Anonymous VPN and Smart DNS Service. Free Installation"
 work=Multiple Devices and Protocols |deadurl=no
 archiveurl=https://web.archive.org/web/20180103183838/https://www.acevpn.com/
 archivedate=2018-01-03 }}
Website
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