Engage vs GetProspect — an accurate finder, plus a definitive Microsoft 365 answer

GetProspect is a good tool, and we will say so plainly: in independent benchmarking it is one of the more accurate finders out there, with a clean interface and a GDPR-conscious, EU-friendly stance. If that is your profile, it earns its place.

Engage is not here to claim GetProspect is inaccurate — it isn’t. The difference is one specific, expensive edge case: Microsoft 365. On US lists that skew heavily to M365 and catch-all domains, Engage returns a definitive answer instead of a probability.

Two accurate finders — one that resolves Microsoft 365

Independent tests put both Engage and GetProspect in the high-accuracy tier for the emails they return. The place they diverge is not general accuracy — it is what happens on a Microsoft 365 mailbox, where SMTP verification is structurally unable to tell "exists" from "doesn’t".

This isn’t a knock on GetProspect. It is "when your list is O365-heavy, a definitive M365 verdict is the difference between a clean send and a burned domain".

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). Every SMTP-based check — however accurate elsewhere — has to guess on O365 and catch-all domains, and you only find out it bounced after you send.

What you get with Engage

Engage does not guess on Microsoft 365. It 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 an accurate, GDPR-conscious finder with a clean UI, and your lists aren’t especially Microsoft 365-heavy → GetProspect is a strong fit.
• Your US lists skew to Microsoft 365 and catch-all domains → Engage gives a definitive O365 answer, per-row transparency, and fair refunds, so deliverability doesn’t hinge on a guess.

Both are accurate finders — different jobs when your list is O365-heavy. Engage’s edge is one that matters exactly where it’s hardest: a definitive answer on Microsoft 365.