Flap · useflap.online
One inbox for every startup you build.
In short: Send and receive email across all your startup domains from one inbox, without setting up a separate email workspace for every project.
Connect all your domains and send & receive email as you@yourstartup.com without paying for a separate Workspace account for every project.
Built for multi-domain founders
Flap is custom-domain email for indie hackers, serial founders, and small studios. Connect every project domain, send as you@yourstartup.com, and keep one inbox — instead of paying for a separate Google Workspace (or similar) for each launch.
- Multiple domains in one inbox
- Send as any project identity
- Catch-all, aliases, and filters
- Guided DNS setup
- API keys and inbound webhooks
- Studio seats for small teams
Pricing
Domain-first plans at https://useflap.online/#pricing: Free $0, Solo $9/mo (3 domains), Builder $19/mo (10 domains), Studio $39/mo (40 domains, team seats).
FAQ
Who is Flap for?
Indie hackers, serial founders, and small studios who own multiple domains and do not want a separate Workspace for every project.
How many domains can I connect?
Free includes 1, Solo 3, Builder 10, Studio 40.
How does DNS / delivery work?
Flap uses Cloudflare Email Routing. You add MX/SPF at your DNS host, then a Worker routing rule for each mailbox.