Engage vs Clearout — find + verify, with a definitive Microsoft 365 answer

Clearout is a solid, established find-and-verify tool: it locates professional emails and runs its own verification, all in one place. If you want find + verify under one roof, that’s a reasonable place to be, and we’ll say so.

Engage takes the same find + verify job and does the hardest part definitively — a real answer on Microsoft 365, instead of the SMTP guess every tool falls back on there. On US O365-heavy lists, that’s what keeps the send clean.

Same job — the difference is what happens on Microsoft 365

Both Engage and Clearout find and verify. The divergence is at the O365 mailbox, where SMTP verification is structurally unable to tell "exists" from "doesn’t". Engage resolves that case definitively; an SMTP-based verifier has to hedge.

This isn’t a knock on Clearout — it does a real job. It’s that when a bounce costs you the domain, a definitive M365 verdict beats a careful guess.

Why Microsoft 365 defeats SMTP verification

Microsoft gives the same answer for a real inbox and a fake one, from anywhere, on purpose (to block spammers). Any SMTP-based verification has to guess on O365 and catch-all domains, and the bounce only appears after you send.

What you get with Engage

Engage keeps your bounce low on those inboxes. For every email, you see why it passed or failed — and if one still bounces, it’s free.

Which should you pick?

• You want find + verify in one tool and your lists aren’t especially Microsoft 365-heavy → Clearout is a reasonable fit.
• Your US lists skew to Microsoft 365 and catch-all domains → Engage gives a definitive O365 answer, per-row transparency, and fair refunds, on the same find + verify workflow.

Both find and verify — different jobs when the list is O365-heavy. Engage’s edge is a definitive answer on Microsoft 365.