The best replacement for voice over is off screen.

The best alternatives to voice over are rated as following:
★★★★★  off screen
★★  subtitles
★★  jaws
★★  dubbing
★  voice off
★  talkback
  voiceover

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

Other search terms related to voice over and their ratings are:
★★★★★ powerpoint
★★★ prezi
★ movie maker
You have in mind a companion for voice over and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of voice over in all years. Click on graph for more.
voice over
off screen
subtitles