The best replacement for cisco asa is pix.

The best alternatives to cisco asa are rated as following:
★★★★★  pix
★★★★  checkpoint
★★★  sonicwall
★★★  palo alto
★★  juniper srx
★★  pfsense
★  fortinet
★  watchguard
★  sophos utm
★  netscreen
★  sonicwall nsa
  checkpoint firewall
  juniper netscreen
  isa server
  checkpoint utm

Your alternative for cisco asa is not listed? Suggest!
Speaking about cisco asa, one probably shouldn't forget about dual isp.

Other search terms related to cisco asa and their ratings are:
★★★★★ dual isp
★★★★ rsa authentication
★★★ content filtering
★★ websense
★ ssl vpn
You have in mind a companion for cisco asa and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cisco asa in all years. Click on graph for more.
cisco asa
pix
checkpoint