Moving from Postmark to MailerSend
A cost comparison and planning checklist. These are assessment steps, not vendor-specific migration instructions.
Postmark
Transactional delivery with clear message retention.
$66.00 / month
Platform · 10,000
Official pricing · Checked 2026-10-05
Cost breakdown and exclusions
- Monthly subscription: $18.00
- Additional emails (10,000 included): $48.00
- Models the published 10,000-message subscription with overages. Larger prepaid message allowances may be cheaper and are not modeled.
- Inbound processing, dedicated IPs, email validation, marketing automation and premium support.
MailerSend
Transactional email with a low-volume monthly subscription.
Not modeled
Free
Official pricing · Checked 2026-10-05
Cost breakdown and exclusions
- 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.
- Free plan includes 500 emails/month.
- Peak sending exceeds 100 emails/day.
- Monthly volume exceeds 100 emails/day over a conservative 28-day period.
- Inbound processing, dedicated IPs, email validation, marketing automation and premium support.
- Peak sending exceeds 1000 emails/day.
- Monthly volume exceeds 1000 emails/day over a conservative 28-day period.
Recurring cost difference
A savings figure cannot be established for this workload.
Not calculated. Estimate migration labor, overlapping subscriptions, transfer charges and contract obligations before dividing those costs by any monthly savings.
What this comparison covers
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.
Evaluating 2 products from 5 published in this category. USD monthly equivalents, before tax. Features and service compatibility need separate evaluation.
- Emails sent
- 50,000 emails / month
- Peak daily sending
- 2,000 emails / day
- Average message size
- 32 KB / email
Before you move
- This is a readiness assessment, not a verified vendor migration procedure.
- Use the source pricing and plan documentation: https://postmarkapp.com/pricing
- Use the target pricing and plan documentation: https://www.mailersend.com/pricing
- Obtain the account permissions, data-owner approvals and tested backups needed for your chosen transfer method.
Modeled recurring cost
Postmark: $66.00/month
MailerSend: Estimate unavailable
A price ranking is unavailable because one or both products lack an eligible estimate for this workload.
Requirements
Platform · 10,000
Free
Check sender verification, suppression lists, templates, webhook semantics and sending limits before moving production messages.
Your migration readiness checklist
Check items as you review them. Progress is kept only while this page is open.
Questions before you decide
Does a lower monthly estimate mean the migration pays for itself?
Not calculated. Estimate migration labor, overlapping subscriptions, transfer charges and contract obligations before dividing those costs by any monthly savings.
Is this a guaranteed migration procedure?
No. This assessment identifies decisions to verify with official provider documentation. It does not establish interoperability, data portability, zero downtime or a rollback guarantee.