The best replacement for chroot is lxc.

The best alternatives to chroot are rated as following:
★★★★★  lxc
★★★★★  jail
★★★★★  docker
★★★★  chroot
★★★★  pivot_root
★★★  arch-chroot
★★★  selinux
★★★  switch_root
★★★  fakeroot
★★  openvz
★★  apparmor
★  bsd jail

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

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



Google Trends

Scale is based on the average worldwide traffic of chroot in all years. Click on graph for more.
chroot
lxc
jail