I’m using siteground cloudflare WAF plan. It works perfect. I have a custom certificate, but I’ve read I only use that certificate with bussines plan. I’m only interested adding this feature in my plan. The only option is buy a bussines plan?
Correct, Business and Enterprise plans only.
What is it about the custom certificate that appeals to you?
Depending on how you are configured you may want to ask this question fo Siteground. If you are integrated through them, the certificate being presented may be ordered and managed through them.