Free: 5 scans/day, basic SPF/DKIM/DMARC/MX/DNSSEC checks, PDF reports, public ranking access.
Starter ($19/mo): 500 scans/month, full history, subdomain discovery, tech fingerprint, TLS audit, WHOIS, reputation check, headers audit, priority support.
Pro ($49/mo): unlimited scans, port scan, API access, HMAC-signed webhooks, weekly digest, embeddable badge, white-label PDF reports.