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SendGrid

Email Free tier (card may be required)

AuthenticationFree tier (card may be required)
Rate limitFree tier: 100 emails per day

Documentation: docs.sendgrid.com · Checked Sep 13, 2026

About

SendGrid is one of the oldest and most trusted email-sending services, now part of Twilio. It gives you 100 free emails a day forever, with a dashboard that shows delivery status, opens, and clicks. It handles the messy parts of email (spam reputation, bounce handling) so your messages land in inboxes instead of spam.

Details

Free tier, but a card may be required to sign up.

Auth: Free tier (card may be required)

Rate limit: Free tier: 100 emails per day

Verified: 2026-09-13

Best for: business developer

Read the docs Back to catalog

Setup

  1. Sign up at sendgrid.com and choose the Free plan
  2. In the dashboard, go to Settings → API Keys → Create API Key with Mail Send access
  3. Copy the key (starts with SG.). You only see it once
  4. Verify a sender: Settings → Sender Authentication → Verify a Single Sender, then click the link in your inbox
  5. Send your first email with their API reference or their single-send test tool
Sign up