Validation-only or full send readiness?
Choose Bouncer when you mainly need a focused email verification workflow. Choose WillItInbox when list quality must connect to message scoring, sender authentication, domain health, DMARC source visibility, and automated QA.
Recipient risk
Classify invalid, risky, catch-all, disposable, role, typo, and unknown addresses.
Message risk
Inspect authentication, DNS, headers, content, links, and the final report score.
Sender risk
Monitor domains, DMARC, provider evidence, and recurring drift.