The best replacement for twitch is vayne.

The best alternatives to twitch are rated as following:
★★★★★  vayne
★★★★★  ustream
★★★★★  teemo
★★★★  caitlyn
★★★★  youtube
★★★★  slow twitch
★★★  tremor
★★★  miss fortune
★★★  shaco
★★★  ezreal
★★★  varus
★★★  fast twitch
★★★  lucian
★★  slow twitch muscles
★★  jinx
★★  spasm
★★  draven
★★  corki
★★  riot meme
★★  tic
★★  sivir
★  evelynn
★  hitbox
★  tetanus
★  ashe
★  fast twitch muscle fibers
★  fasciculation
★  urgot
★  tristana
★  eve
★  slow twitch muscle fibers
★  not to twitch
★  graves
★  cait
★  metal mulisha
★  no xplode
★  giovanni
★  justin tv
  slow twitch muscle
  vladimir
  evelyn
  malzahar
  anivia
  black chiney
  own3d
  kog maw
  twitch
  karthus
  muscle spasm

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

Other search terms related to twitch and their ratings are:
★★★★★ obs
★★★★ shadowplay
★★ fraps
★★ tiamat
★ sophia grace and rosie
★ xsplit
dxtory
You have in mind a companion for twitch and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of twitch in all years. Click on graph for more.
twitch
vayne
ustream