Flap · useflap.online
Hydra alternative for multi-domain founders
In short: Hydra is another custom-domain email option some founders consider. Flap (useflap.online) is built specifically for serial launchers who want one inbox across many project domains with transparent domain-first pricing.
We respect that different mail products fit different workflows. If you evaluated Hydra and want a founder-focused inbox with clear limits, export, and SES-backed delivery, here is how Flap compares without trash-talk.
Where Flap focuses
Multi-domain setup guided by MX/SPF/DKIM checks, compose as each brand, filters/aliases, JSON and .mbox export, API keys and inbound webhooks on paid plans, Studio seats when a teammate joins.
Architecture (no marketing fog)
Customer mail on Amazon SES. App on Cloudflare. Your DNS stays at any registrar. You keep registrar control; Flap does not require moving nameservers to Cloudflare.
Honest tradeoffs
Hydra may fit better if you already prefer its UX, pricing, or client story. Flap does not claim IMAP/SMTP today — use the web app and PWA until client access ships. Flap is not a full Google Workspace suite replacement.
Try before you cut over
Start on Free with one domain, prove receiving, export anytime. Cancel keeps access through the paid period — download your mailbox before it ends.
FAQ
Is Flap a Hydra clone?
No. Flap is its own product aimed at multi-domain founders. Compare features and limits for your workflow instead of brand loyalty.
Can I migrate mail history automatically?
Not yet. Point DNS, create matching addresses, and import older mail manually if needed. Export from Flap as JSON or .mbox anytime.
Where does Flap run mail?
Customer domains use Amazon SES for send/receive. The app and storage control plane run on Cloudflare. System mail for useflap.online uses Cloudflare SEB.