The best replacement for mesos is openstack.

The best alternatives to mesos are rated as following:
★★★★★  openstack
★★★★  zookeeper
★★★★  coreos
★★★  helix
★  yarn

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

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



Google Trends

Scale is based on the average worldwide traffic of mesos in all years. Click on graph for more.
mesos
openstack
zookeeper