I'm working on Cachoid -- a Varnish-as-a-service platform -- https://www.cachoid.com/
Site caching is so underrated I had to do something about it. In fact, I recently announced its first public beta. The one USP is this: you create a Cachoid and it automatically starts caching your site. No need to get into the nitty-gritty details of caching or get your hands dirty. It just works!
The difference between Cachoid and other platforms is that we guarantee memory allocations per Cachoid (Varnish instance container on steroids), which is crucial to achieve speed. A multi-tenant content distribution network doesn't always have a memory-store SLA for its tenants.
More info: https://www.cachoid.com/
Quick overview of its architecture: https://www.cachoid.com/blog/2017/01/15/high-level-architect...