The best replacement for instapaper is evernote.

The best alternatives to instapaper are rated as following:
★★★★★  evernote
★★★★★  read it later
★★★★  pocket
★★★  pinboard
★★  safari reading list
★★  pocket android
★★  delicious
★★  readability
★  readitlater
★  read later
★  flipboard
★  reading list
★  google reader
★  reeder
★  offline pages
  safari reader
  diigo
  pocket app

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

Other search terms related to instapaper and their ratings are:
★★★★★ readability
★★★ safari reading list
★ flipboard
You have in mind a companion for instapaper and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of instapaper in all years. Click on graph for more.
instapaper
evernote
read it later