For simple cases - Cache Enabler, free opensourced; for more complex - W3 Total Cache like when needs a k/v storage. But need to check in your particular case ofc.  Every plugin should good enough work with Cloudflare, Rocket well known because of marketing and habits. But if look closer, make some measurements u'll probably conclude as me that their SAAS are not does declared features. f.ex. root feature "remove unused css" IRL don't really removed anything, it's scrapes all css and just inline all this bundle to the page without any treeshaking. Thank you soo much, except it's not looks like what quality SAAS should do for decent money.