The best replacement for vagrant is docker.

The best alternatives to vagrant are rated as following:
★★★★★  docker
★★★★  puppet
★★★★  chef
★★★★  virtualbox
★★★  mamp
★★★  packer
★★  virtualenv
★★  ansible
★★  boxen
★  vagabond
★  juju
★  cobbler
  boot2docker
  wanderer
  capistrano
  tramp

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

Other search terms related to vagrant and their ratings are:
★★★★★ puppet
★★★★★ chef
★★★★★ docker
★★★★ virtualbox
★★★★ parallels
★★★ ansible
You have in mind a companion for vagrant and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of vagrant in all years. Click on graph for more.
vagrant
docker
puppet