The best replacement for extranet is intranet.

The best alternatives to extranet are rated as following:
★★★★★  intranet
★★★  internet
★★★  dmz
★★  portal
★  virtual private network
★  intranet ppt
★  edi
★  an intranet
  realidad virtual

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

Other search terms related to extranet and their ratings are:
★★★★★ extranet
You have in mind a companion for extranet and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of extranet in all years. Click on graph for more.
extranet
intranet
internet