The best replacement for ipsec is ssl.

The best alternatives to ipsec are rated as following:
★★★★★  ssl
★★★★  pptp
★★★  l2tp
★★  openvpn
★★  mpls
★★  vpn
★★  tls
★★  ssl vpn
★★  gre
★  ssh
★  ipsec
★  pptp vpn
★  https
  ssl more secure
  ike
  l2tp vpn
  openvpn performance
  ssl/tls
  macsec
  gre tunnel
  802.1x
  haipe

Your alternative for ipsec is not listed? Suggest!
Speaking about ipsec, one probably shouldn't forget about gre.

Other search terms related to ipsec and their ratings are:
★★★★★ gre
★★★ l2tp
★★★ ipv6
★★ anyconnect
★ tunnel
★ vrf
★ nat traversal
★ pptp
ike
bgp
You have in mind a companion for ipsec and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ipsec in all years. Click on graph for more.
ipsec
ssl
pptp