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What is the Difference Between PPTP, L2TP and Open VPN

PPTP (Point-to-Point Tunneling Protocol) is lower level encryption method compared to L2TP and OpenVPN. With 128 bit keys it will feel slightly faster than L2TP and OpenVPN. PPTP is ideal because of the ease of setup.
L2TP (Layer Two Tunneling Protocol) is considered a bit more secure than PPTP as it uses 256 bit keys giving a higher level of encryption. L2TP encapsulates data twice making it less efficient and slightly slower.
OpenVPN offers the most secure connection option at the moment without sacrificing performance and speed. It offers up to 256-bit encryption, depending on the service provider. When used in its default UDP mode, OpenVPN provides the best performance.