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Postmark — Transactional emails that actually arrive in the inbox — not the spam folder

Email Deliverability

Postmark is a transactional email service built for speed and deliverability. Password resets, order confirmations, and notifications sent through Postmark have a 99.9%+ inbox delivery rate and arrive in under 10 seconds. Separate sending streams prevent marketing emails from hurting transactional deliverability.

Best for

  • +SaaS companies needing reliable transactional email delivery
  • +Teams frustrated with emails landing in spam
  • +Developers wanting fast setup with great API docs

Not ideal for

  • −Companies needing marketing email (newsletters, promos)
  • −Teams wanting a visual email builder
  • −Businesses sending fewer than 100 emails/month

Illustrative Case Study

Based on realistic usage patterns and typical results reported by users — not a verified customer story. Numbers are illustrative.

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The Problem

A SaaS company was losing 18% of signups between 'account created' and 'email confirmed'. Confirmation emails were being sent via their marketing platform's SMTP — the same infrastructure used for newsletters. When they checked, confirmation emails were taking 4–7 minutes to arrive, and 12% were landing in spam.

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The Solution

Moved transactional emails to Postmark ($15/mo for their volume). Separate dedicated sending IP, DKIM and SPF properly configured. Confirmation emails now arrive in under 8 seconds with 99.97% inbox rate.

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The Result

Email confirmation rate jumped from 82% to 97%. At 600 signups/month, that's 90 extra confirmed users per month. With a 22% trial-to-paid rate and $49/mo average plan, 90 extra confirmations = ~20 extra paying customers = $980/mo in new MRR.

💡 ROI Estimate: Tool costs $15/mo. Recovered MRR from better deliverability: $980/mo. ROI: 65x.

— Frequently asked questions about Postmark

Is Postmark better than SendGrid?+
For transactional email (password resets, receipts, notifications), Postmark delivers faster and with higher inbox rates. SendGrid is better if you also need marketing email in the same platform.
How much does Postmark cost?+
Postmark charges $1.25 per 1,000 emails with no monthly minimums. For 10,000 emails/month, that's about $12.50/month — very affordable for transactional email.
Why are my transactional emails going to spam?+
Common causes: mixing marketing and transactional email on the same domain/IP, missing DKIM/SPF/DMARC records, or using a shared sending service. Postmark solves this by separating transactional email with dedicated infrastructure.
Browse all Email Deliverability tools →

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— See also in Email Deliverability

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SendGrid

Reliable email delivery at scale — 100B+ emails sent per year

💰 Your ROI Calculator

Personalize the estimate — what's your time worth?

$/hr

Postmark saves ~0 hrs/mo on Signup drop-off caused by slow or spam-filtered confirmation emails.

Time value (0 hrs × $50)$0/mo
Tool cost−$15/mo
Net monthly savings-$15/mo

* Estimate based on typical usage. Your actual results will vary.

Pricing

Starting from$15/mo (10,000 emails)
✓ Free plan

Quick facts

CategoryEmail Deliverability
Headquarters🇺🇸 USA
◆5.0/ 5.0Boring Score

💡 Tool costs $15/mo. Recovered MRR from better deliverability: $980/mo. ROI: 65x.

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