The best replacement for obs is xsplit.

The best alternatives to obs are rated as following:
★★★★★  xsplit
★★★  nbs
★★★  fraps
★★  shadowplay
★★  super duty
★★  evolve
★  bandicam
★  wbs
★  midwives
  ops
  wirecast

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

Other search terms related to obs and their ratings are:
★★★★★ twitch
★★★★ elgato
★★★★ hd pvr 2
★★★ ustream
★★★ avermedia
★★★ shadowplay
★★★ capture card
★★ dazzle
★★ hauppauge
★ roxio hd pro
dxtory
You have in mind a companion for obs and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of obs in all years. Click on graph for more.
obs
xsplit
nbs