The best replacement for avg is avast.

The best alternatives to avg are rated as following:
★★★★★  avast
★★★★★  norton
★★★  avira
★★★  mcafee
★★★  kaspersky
★★  microsoft security essentials
★★  windows defender
★  bitdefender
★  mse
★  avast 2014
★  nod32
★  lookout
★  malwarebytes
★  comodo
★  microsoft essentials
★  norton 360
★  avast free
  webroot
  antivir
  security essentials
  symantec
  avast 2013
  norton antivirus
  trend micro
  median
  adaware
  rms
  norton internet security
  ad aware
  avast for android
  eset
  defender
  bitdefender free
  onecare
  avast which is best
  avast free edition
  nortons
  norton 2011
  active virus shield
  avast antivirus
  zonealarm
  avast 2012
  zone alarm
  kaspersky 2013
  spybot
  panda

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

Other search terms related to avg and their ratings are:
★★★★★ malwarebytes
★★★ windows defender
★★★ firewall
★ microsoft security essentials
★ comodo firewall
firewall free
You have in mind a companion for avg and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of avg in all years. Click on graph for more.
avg
avast
norton