Yes, on Phoenix!
Our Phoenix Platform fully supports an encrypted connection with the end users. If you'd like to setup SSL on your site, we highly recommend using Cloudflare's Free SSL option which is free, easy to setup, and low maintenance. One benefit and reason why we recommend Cloudflare over traditional certificates is that they expire and need to be renewed on a yearly basis which you don't need to worry about with Cloudflare.
Cloudflare has 3 SSL Options, their Flexibly SSL is the easiest to setup and handles most of our client's encryption needs.
Our Phoenix platform also works with traditional SSL/TLS certificate. This service will cost $200 annually for each subdomain.
You can purchase a certificate and then purchase the Custom SSL Installation service on your Pronto Dashboard account. We'll generate the CSR and the Private Key for you within 1 business day, after that you can generate the Public Key and send it back to us, then we'll enable HTTPS on your website.