Flap · useflap.online
ImprovMX alternative when you need a real inbox
In short: ImprovMX focuses on email forwarding and aliases. Flap (useflap.online) hosts a real multi-domain inbox so you can send and receive as you@yourstartup.com without a Workspace per launch.
Keep ImprovMX if forwarding to Gmail is enough. Switch intent to Flap when you need stored mail, compose-as-brand, filters, and outbound from your domains.
Forwarding vs inbox
Forwards-only products solve aliasing. Flap stores mail, supports compose identities, aliases/catch-all (plan allowing), and export — a different job than redirecting to another mailbox.
Architecture
Customer mail on Amazon SES. App on Cloudflare. Your DNS stays at any registrar.
Honest tradeoffs
ImprovMX can be simpler and cheaper when you only need redirects. Flap costs more as you scale domains because you get a hosted inbox, not a forward.
FAQ
Is Flap email forwarding?
No. Flap is a hosted inbox. Optional forwarding rules exist inside the product, but the core is stored mail on SES.
Can I keep Gmail and add Flap?
Yes for a transition. Long-term, founders usually cut over MX fully so brand mail is not split across providers.