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COMPARE / TRANSACTIONAL EMAIL

Transactional email, with the math.

Compare delivery costs from the first welcome email to millions of messages.

Outbound transactional email, one recipient per send, shared IPs and one sending domain. Monthly billing without introductory discounts. Deliverability and support differ. Marketing automation, inbound processing, validations and dedicated IPs are excluded.
YOUR COMPARISON, YOUR CALL

Bring your shortlist.

3 / 4 selected

Choose up to four products for a closer look. The full cost ranking stays below.

Showing 5 of 5 supported products. Find products for this comparison

Your workload

Monthly usage. Adjust the assumptions to match your product.

emails / month

Count recipients, including retries and transactional notifications.

Maximum 10,000,000 emails / month
emails / day

Your busiest day. Free daily limits also require monthly sends to fit a conservative 28-day billing period.

Maximum 10,000,000 emails / day
KB / email

Message data including attachments, using decimal KB. Used for SES outgoing-data charges.

Maximum 10,000 KB / email
Estimates are in USD before taxes. Your usage stays in this URL.
Decision guideOne shared workload.
Different trade-offs.
Monthly equivalentUSD · before tax$35.00Foundation$66.00Platform · 10,000$20.00Lowest in your shortlistPro · 50,000
Payment commitmentMonthlyMonthlyMonthly
Fits this workload?Within modeled limitsWithin modeled limitsWithin modeled limits
What to know

Recurring price after any trial. Only the included allowance is verified; higher-volume quotes are unavailable.

Models the published 10,000-message subscription with overages. Larger prepaid message allowances may be cheaper and are not modeled.

Pay-as-you-go must be enabled. Additional emails are charged in whole 1,000-email buckets. Higher prepaid volume plans are not modeled.

Outside the estimate

Inbound processing, dedicated IPs, email validation, marketing automation and premium support.

Inbound processing, dedicated IPs, email validation, marketing automation and premium support.

Inbound processing, dedicated IPs, email validation, marketing automation and premium support.

EvidenceOfficial pricing ↗Checked 2026-10-05Official pricing ↗Checked 2026-10-05Official pricing ↗Checked 2026-10-05

Look ahead, before you commit.

Vary emails sent. Keep all other inputs fixed.

Growth simulation
PostmarkResendMailgun
View exact values and assumptions

Each point follows your selected plan. Automatic choices use the lowest eligible supported plan per product. Missing values mean no supported plan fits. This varies one input, not all costs with customer count.

Emails sentPostmarkResendMailgun
12,500 emails / month$19.50$20.00$35.00
25,000 emails / month$36.00$20.00$35.00
50,000 emails / month$66.00$20.00$35.00
100,000 emails / month$126.00$65.00$90.00
250,000 emails / month$306.00$200.00Not available
500,000 emails / month$606.00$425.00Not available

Your monthly comparison

4 eligible products in this loaded set · Lowest modeled cost first

USD / month equivalent
01
Amazon SES Lowest estimate

À la carte outbound

$5.19/ month equivalent
02

Pro · 50,000

$20.00/ month equivalent
03

Foundation

$35.00/ month equivalent
04

Platform · 10,000

$66.00/ month equivalent
1 plans outside this workload
MailerSend · Free

Approval and card required. Assumes one send per API request; API calls for other actions consume daily limits. 1,000 API requests/day; assumes one send per request and no other API activity. Other plans and annual discounts are not modeled.

Prices reflect dated, supported plans. Matching a category does not mean matching features. How estimates work

3 products on your board · Same workload, clearer trade-offs.