Cheap Wildcard SSL Certificates Secure unlimited Sub-Domains for one low price – get our cheapest prices on Wildcard SSL Certificates If you have a website that has multiple sub domains, you're going to love wildcard SSL certificates. Rather than having to purchase an SSL certificate for each and every sub domain, you can actually protect them all with just one wildcard SSL certificate. This can lead to some major savings and make managing your SSL portfolio a breeze.