Why We Built This?

Gmail spam filter is very complex. The same email can end up in spam for you and in inbox for me!

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The email below is in my spambox. I signed up for that newsletter. It’s from First Backer.

Most other people will receive it in their inbox.

Tl;dr; the same email will be sent sometimes in spam, sometimes in inbox.

This concept makes traditional and expensive ways to measure deliverability obsolete such as sending an email to a test address or looking at open rates per domain.

Inboxbooster free deliverability detector tells you all this for free! And because we built it with a dataset of over 100 million emails we know the results are reliable.

Inboxbooster free deliverability detector tells you all this for free! And because we built it with a dataset of over 100 million emails we know the results are reliable.

Our technology is patent pending. We mention it here because we are legally obliged to.

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