1
Advanced Database Cleaner Included
Main site can clean the whole network in free; Premium adds per-site filtering.
89feature score
WordPress Database Optimization Plugins with Multisite support
Clean and optimise across a multisite network. 7 of the 8 plugins we track include it.
2
WP-Optimize Paid version Premium
Premium can optimise any site or combination of sites on a network.
80feature score
3
Database Cleaner Partial
Changelog notes improved multisite support, but network-wide cleaning is not documented.
79feature score
4
LiteSpeed Cache Included
Database tools run network-wide from Network Admin or per subsite.
44feature score
5
Optimize Database after Deleting Revisions Included
Network-activate and one run optimises every site in the network.
53feature score
6
WP-Sweep Partial
Runs per site; uninstall cleans the whole network but no network-wide sweep is documented.
44feature score
7
Perfmatters Partial
Multisite works on the Unlimited plan, but no network-wide database cleanup is documented.
42feature score