MailerSend vs Postmark
MailerSend
mailersend.com
Postmark
postmarkapp.comSide by side
| Figure | MailerSend | Postmark |
|---|---|---|
| Price from | $7/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 8 |
| Spec score · Email APIs | 9.0 (#1) | 8.6 (#6) |
| Spec score · Transactional Email Software | 9.0 (#3) | 8.7 (#7) |
| Spec score · Email delivery APIs | 9.0 (#1) | 8.8 (#2) |
| Spec score · Transactional email services | 8.5 (#15) | 9.2 (#1) |
| Integrations | Official integrations include WordPress, WooCommerce, Firebase, Symfony, React Email, Supabase, Make, NocoDB, Pipedream, Zapier-related tools and others. | Official integrations include Slack, Zapier, Stripe, WordPress, Supabase, Bubble, Craft CMS, Netlify, and Gravity Forms. |
| Support | Official plans provide email support, live chat on higher tiers, priority support and onboarding assistance for Professional customers. | Postmark offers support by email, live chat, and one-on-one calls and reports a 95% customer happiness rating. |
| Templates | Users can create templates with drag-and-drop, rich-text or HTML editors and use prebuilt templates. | Postmark provides editable responsive templates for welcome emails, password resets, receipts, invoices, invitations, and other transactional messages. |
| Tracking | The platform includes real-time activity views, tracking and analytics reports that can be filtered by domain and tags. | Postmark provides delivery, bounce, spam, open, and link tracking plus event webhooks. |
| What it does | MailerSend is a hosted transactional messaging service for sending and tracking email, SMS and WhatsApp messages. | Postmark delivers and tracks application email as a replacement for SMTP or Sendmail. |
Plans
MailerSend
- FreeFree
- Hobby$7 a month
- Starter$35 a month
- Professional$110 a month
- EnterprisePriced on request
Postmark
- FreeFree
- Basic$15 a month
- Pro$16.50 a month
- Platform$18 a month
- Custom activity retention$5 a month
- DMARC monitoring$14 a month
- Dedicated IP$50 a month
- High-volume plansPriced on request
In their own words
MailerSend
MailerSend delivers transactional email through an email API and SMTP relay. Its editing tools include drag-and-drop, HTML and rich-text editors, along with dynamic templates and split testing. Webhooks, tracking, real-time activity, analytics and suppression-list management support monitoring. Inbound routing can parse replies into application events and route them to an app for further action. Integrations listed include Zapier, Supabase, Firebase, Slack, Laravel, WooCommerce, WordPress, ChatGPT and Claude. The Free plan is free and allows 500 emails per month, 100 daily API requests, one domain and one template. Hobby costs $5.60 a month, billed $67.20 yearly, and includes 5,000 emails per month. The pricing note lists paid plans from $7/mo. A 14-day Professional trial includes 500 emails per month, 100 daily API requests and one day of log retention. MailerSend is available on web, API and iOS; its mobile app is currently only available for iOS. It states that it is GDPR-compliant and hosts services in a certified ISO 27001 data center in Belgium.
Postmark
Postmark delivers and tracks application email as an alternative to SMTP or Sendmail. It separates transactional and broadcast messages into different Message Streams and IP infrastructure. Developers can send through REST API, SMTP, or multi-region SMTP routing, with official libraries for Node.js, Python, Rails, Ruby, PHP, and.NET. Inbound messages can be converted to JSON and sent to a webhook URL. Tracking includes delivery, bounces, spam, opens, and links, with event webhooks. Editable responsive templates cover transactional messages such as password resets, receipts, and invitations. The free Developer plan costs nothing, provides 100 emails per month, permits no overages, and does not expire. Basic starts at $15 a month for 10,000 emails per month; extra emails cost $1.80 per 1,000 and are calculated at the end of the billing cycle. Unused emails do not roll over. Postmark lists API and web access. Its iOS app was sunset in June 2025 and is no longer supported.