SendGrid

High-throughput sending via the SendGrid API.

All plans Server-side

How it works

Same model as Resend: API key plus an optional verified sender, stored encrypted.

Used for Broadcasts (Audience → Broadcast), emails from the Submissions page, and the welcome auto-responder. SendGrid has no shared sandbox sender like Resend. You can connect with an API key, but emails will not send until you add a verified From address.

How it flows

Add API key
Validated & stored
Verify a sender
Email delivered

Set it up

  1. 1

    Create an API key

    In SendGrid → Settings → API Keys, create a key.

    SendGrid API keys
  2. 2

    Connect

    In Settings → Integrations → SendGrid, paste the key and connect. You can add the From address now or later.

  3. 3

    Verify a sender

    In SendGrid → Settings → Sender Authentication, verify a sender or domain, then add that address as your From email to start sending.

Configure in Settings

Official resources

Tips to get the most out of it

  • Use SendGrid analytics to monitor opens/clicks and refine subject lines.
  • Warm up a new domain gradually to protect your sender reputation.