@Richienb, it seems that that's better categorized as a CDN rather than a web host.
https://support.cloudflare.com/hc/en-us/articles/200172526-Is-CloudFlare-a-hosting-provider-
Also, last I knew, they didn't widely use Let's Encrypt certificates.
We've had a separate thread for CDN provider support for Let's Encrypt
although it hasn't attracted as much interest as the web hosting thread.