The best replacement for hosted exchange is in house.

The best alternatives to hosted exchange are rated as following:
★★★★★  in house
★★★  in-house exchange
★★★  calender share
★★★  pop3
★★★  goosync
★★  imap
★★  exchange online
★★  google apps
★★  365
★  hosted email
★  exchange server
★  google apps for business
★  office 365
★  in house exchange
★  bpos
★  google mail
  webmail
  mobileme
  pop email

Your alternative for hosted exchange is not listed? Suggest!
Speaking about hosted exchange, one probably shouldn't forget about ad sync.

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



Google Trends

Scale is based on the average worldwide traffic of hosted exchange in all years. Click on graph for more.
hosted exchange
in house
in-house exchange