Built for the inbox you actually have

Apple Mail alone accounts for more tracked email opens than Gmail, Outlook, and Yahoo Mail combined — and it never renders AMP for Email, the technology most interactive-email platforms bet on. We publish the sourced numbers behind that because it’s the reason MailInApp exists in the first place: an interactive email that only works for a quarter of a recipient list isn’t really interactive, it’s a demo.

So instead of building on AMP, MailInApp’s studio compiles every interactive block — polls, forms, countdowns, checkout, quizzes — down to kinetic HTML/CSS with a three-tier fallback underneath it: a working interactive version where the client supports it, a clean static version with link-first interactions everywhere else, and a dedicated Outlook tier for the one rendering engine that needs its own rules. Nobody who opens the email sees a broken layout, whichever tier they land on.

We think the right way to earn trust in this category is to show the work rather than assert it — hence the fallback engine’s documentation, the sourced research we publish, and a no-code studio built so anyone on a team can build an interactive email without waiting on a developer to hand-code a fallback path.

MailInApp isn’t trying to replace your existing ESP relationship — projects export to plain HTML that works through Mailchimp, Brevo, SendGrid or anything else you already use, or send natively from your own verified domain when you’d rather skip a separate provider entirely. Same email, same fallback engine, either way.