The best replacement for filevault is bitlocker.

The best alternatives to filevault are rated as following:
★★★★★  bitlocker
★★★★★  truecrypt
★★★  disk utility
★★  legacy filevault
★★  journaled encrypted
★★  knox
★★  time machine
  file vault

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

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



Google Trends

Scale is based on the average worldwide traffic of filevault in all years. Click on graph for more.
filevault
bitlocker
truecrypt