Free email API tiers compared
Mailfully's free plan sends 5,000 emails a month, up to 200 a day, with no card. The other providers' figures come from their own pricing pages and help centers.
Figures checked October 7, 2026.
How does Mailfully's free plan compare?
Among the free plans compared here, only Brevo's allows more mail than Mailfully's. Brevo gives 9,000 emails a month and 300 a day, against our 5,000 and 200.
Resend gives 3,000 emails a month with at most 100 a day. Postmark's 100 a month comes with no daily limit. Mailgun publishes only a cap of 100 a day. SendGrid and Mailchimp Transactional have no free plan: SendGrid gives new accounts a 60-day trial, and Mailchimp Transactional a one-time demo of 500 emails.
Free plans side by side
Free plans as each provider publishes them, checked in October 2026. The table lists only the providers we have a full comparison page for. A new account can send live mail as soon as its domain is verified, and a short review, usually within a day, lets it send more.
Scroll sideways to see every column.
| Provider | Emails a month | Daily limit | At the limit | How long it lasts |
|---|---|---|---|---|
| Mailfully | 5,000 emails | 200 emails | Sending stops at the allowance, and nothing is billed | No time limit once your domain is verified |
| Resend | 3,000 emails | 100 emails | Sending stops; no overage on Free | No time limit |
| Postmark | 100 emails | No daily limit | No overages allowed | No time limit |
| SendGrid | No free plan | 100 emails during the trial | Can't exceed 100 a day | 60-day trial since 2025, then sending stops |
| Brevo | 9,000 emails | 300 emails | Up to 1,000 held in a retry queue, the rest not delivered | No time limit; inactive accounts deleted after 4 months |
| Mailgun | Not published | 100 emails | Capped at 100 a day | No end date stated |
| Mailchimp Transactional | No free plan | No free plan | Demo ends at 500 sends; paid sending stops when blocks run out | One-time demo of 500 emails, no expiry |
Compare one provider
Resend
Resend's free tier gives you 3,000 emails a month, but never more than 100 in a single day.
Postmark
Postmark's free plan includes 100 emails a month, with no overages allowed.
SendGrid
SendGrid hasn't had a free plan since 2025: new accounts get a 60-day trial at 100 emails a day, and sending stops when it ends unless you've picked a paid plan.
Mailgun
Mailgun's free plan allows 100 emails a day, the only volume figure Mailgun publishes for it.
Paid prices at every volume are in the monthly cost table, and the full comparisons are on the alternatives pages.