[yourabi]

There are some pretty crucial and obvious differences between these two products.

Does DigiCert provide any guarantees on how often they monitor your certificates? Do they offer any alert mechanisms other than email? Do they let you monitor certificates that are on your critical path but not necessarily ones you own (partners...etc)

You also mention cost..but since you are not paying them you are not their customer - you are their product.

Snitch is clearly aligned with customers since our goal is to help you succeed at securing your site. Our goal is to make it easy for you (site owner) to do the right thing and provide a good experience to your customers.