The best replacement for stamps is endicia.

The best alternatives to stamps are rated as following:
★★★★★  endicia
★★★★  wic
★★★  seals
★★★  pitney bowes
★★★  riders
★★★  argos
★★  tanf
★★  rubber stamps
★★  stickers
★★  labels
★  ebt
★  stencils
★  postage
★  stamps
★  clear stamps
★  welfare
★  eskimos
★  pre inked
★  esks
★  metered mail
★  snap
★  ebt card
★  regular stamps
★  link card
  self inked
  sheets of stamps
  postage meter
  self inked stamps
  corporate welfare
  1 stamp

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

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



Google Trends

Scale is based on the average worldwide traffic of stamps in all years. Click on graph for more.
stamps
endicia
wic