Sites without an SSL Certificate
There are two methods of finding sites without an SSL Certificate or that don't use HTTPS -
Create a list of sites that are not 'defaulting to HTTPS/SSL'
- Create a report on the technology you are interested in
- Select 'Advanced Filter' on the report
- On the Tech Tab search for 'SSL by Default'
- Select 'Never used SSL by Default

This report will list sites in your list that do not redirect to HTTPS immediately.
Create a List of Sites not using any known SSL Certificates
- Create a report on the technology you are interested in
- Select 'Advanced Filter' on the report
- On the 'Category' tab search for SSL Certificates
- Select 'Never used tech in SSL category'