Email cost calculator
Enter how many emails you send per month to estimate the bill on each provider. The model is
cost = plan base + per-1,000 rate × (volume − included). As of June 2026, Amazon SES
is the cheapest at $0.10 per 1,000 (pay-as-you-go); Resend and SendGrid are about
$0.40 per 1,000, Mailgun ~$0.70 and Postmark $1.50. The winner flips at low
volume because the others bundle a monthly base fee. Estimate only — verify on the vendor pricing
page.
Data as of June 2026.
Vendor pricing as of June 2026 — verify on the vendor pricing page. Add-ons (dedicated IPs, email validation, marketing streams) are not included.
How the estimate works
For each provider: monthly cost = base fee + per-1,000 rate × max(0, volume − included).
Amazon SES has no base fee or included allowance, so it is simply $0.10 × (volume ÷ 1,000).
See the full email API comparison or individual profiles for
SES, SendGrid,
Resend, Mailgun and
Postmark.
Frequently asked questions
What is the cheapest way to send transactional email?
At high volume, Amazon SES is the cheapest at $0.10 per 1,000 emails, but it is bare infrastructure. For a turnkey product, Resend and SendGrid Essentials are about $0.40 per 1,000, Mailgun about $0.70, and Postmark $1.50. Use the calculator to compare at your monthly volume.
How is the monthly email cost estimated?
Estimated cost = plan base fee + (per-1,000 rate × emails beyond the included allowance). For SES there is no base or included allowance; you simply pay $0.10 per 1,000. This is an estimate — verify with the provider, since plans, overage rates and add-ons (dedicated IPs, validation) vary.
Last updated: 2026-06-18