Perimetry Cloud audits what anyone on the internet can see about your domains: e-mail authentication, DNS, certificates, subdomains, mail servers, websites and exposed services. It never attacks anything. Here is the whole path from a new account to your first full report, in about ten minutes of your time.

The steps

Create your account. Open the sign-up page, give your workspace a name (your company or your own name), your e-mail address and a password of at least 12 characters. The Free plan needs no card.
Confirm your e-mail address. Open the link we send you (it lasts 24 hours) and enter your password once more. Nothing is audited before this.
Add your domain. Choose Add a domain and enter the registrable domain, such as example.com rather than www.example.com. Subdomains are found automatically.
Run the quick check, if you like. On the domain’s page, Run the quick check gives a first look with the public checks only, in about two minutes. You can skip it.
Publish the TXT record. Add the TXT record shown on the domain’s page to your DNS zone, then press Check the record now. This proves the domain is yours.
Read your first report. Once the record is found, the page says “Ownership confirmed” and the first full audit starts on its own. The report appears on the page when it ends, usually within a couple of minutes.
Add an alert channel. On the Alerts page, add the e-mail address (or, from the Solo plan, the webhook) that should hear about changes. No alert is sent until a channel exists.

What happens next

From now on the domain is audited on a schedule: every month on Free, every week on Solo, every day on the Agency plans. Between audits, Perimetry Cloud also watches the certificates issued for your domain and whether your site answers.

Each audit is compared with the previous one. When something changes (a new finding, a new subdomain, a certificate, a look-alike domain, a drop of the score), the channels you added on the Alerts page are told, according to the rule you chose for each one.

Where to go from here

To understand the report, read Read a report and How the score and the grade are computed.
To fix what was found, start with Fix a finding and check that it is fixed.
To add more domains at once, see Import a list of domains.
Not ready for an account? The free check shows the score and the three most serious findings of any domain, without signing up.