Choose a provider

Pick an email API, connect user inboxes, or combine both behind the same emailkit API.

Pick whatever fits your product — your app code looks the same either way, and you can add or swap providers later without rewrites.

Email APIs

For product emails, notifications, campaigns, and addresses your app manages. Connect with an API key and send from a domain you own.

Resend

The quickest way to send product email, receive messages, and manage domains.

Mailgun

Flexible inbound routing, detailed tracking, EU hosting, and domain management.

AIInbx

Create inboxes through an API, keep conversations threaded, manage domains.

Mailbox providers

For when users connect their own inbox. They sign in with Google or Microsoft, and your app sends and receives through their account with the same API.

Gmail

Connect Gmail inboxes, keep replies threaded, receive new messages.

Outlook

Connect Microsoft 365 inboxes, receive new mail, reply natively.

Capability map

Once a provider is configured, TypeScript shows you everything else it can do — reply threading, duplicate-send protection, custom headers, and more.