Sending service comparison
Postmark vs SendGrid: what sending costs at every volume
Compare Postmark and SendGrid at every recorded email volume, including the full monthly total with GoodPostal.
What does each service cost at your email volume?
Monthly estimates in United States dollars, rounded to whole dollars. Taxes, temporary credits and optional add-ons are excluded.
Last checked Sep 21, 2026. See Postmark's pricing page.
| Emails a month | Plan that fits | Postmark monthly | GoodPostal | Total |
|---|---|---|---|---|
| 10,000 | Basic 10KPlan fee $15; 10,000 included emails. | $15 | $20 | $35 |
| 25,000 | Pro 10KPlan fee $16.50; 10,000 included emails. | $36plus 15,000 emails over the plan ($20) | $20 | $56 |
| 50,000 | Basic 50KPlan fee $55; 50,000 included emails. | $55 | $22 | $77 |
| 100,000 | Pro 50KPlan fee $60.50; 50,000 included emails. | $126plus 50,000 emails over the plan ($65) | $24 | $150 |
| 250,000 | Platform 125KPlan fee $138; 125,000 included emails. | $288plus 125,000 emails over the plan ($150) | $32 | $320 |
| 500,000 | Pro 300KPlan fee $269.50; 300,000 included emails. | $520plus 200,000 emails over the plan ($250) | $44 | $564 |
| 1,000,000 | Pro 700KPlan fee $500.50; 700,000 included emails. | $876plus 300,000 emails over the plan ($375) | $69 | $945 |
Last checked Sep 21, 2026. See SendGrid's pricing page.
| Emails a month | Plan that fits | SendGrid monthly | GoodPostal | Total |
|---|---|---|---|---|
| 10,000 | Essentials 50KPlan fee $19.95; 50,000 included emails. | $20 | $20 | $40 |
| 25,000 | Essentials 50KPlan fee $19.95; 50,000 included emails. | $20 | $20 | $40 |
| 50,000 | Essentials 50KPlan fee $19.95; 50,000 included emails. | $20 | $22 | $42 |
| 100,000 | Essentials 100KPlan fee $34.95; 100,000 included emails. | $35 | $24 | $59 |
| 250,000 | Essentials 100KPlan fee $34.95; 100,000 included emails. | $170plus 150,000 emails over the plan ($135) | $32 | $202 |
| 500,000 | Essentials 100KPlan fee $34.95; 100,000 included emails. | $395plus 400,000 emails over the plan ($360) | $44 | $439 |
| 1,000,000 | Pro 700KPlan fee $499; 700,000 included emails. | $739plus 300,000 emails over the plan ($240) | $69 | $808 |
GoodPostal is a flat $19 a month plus $0.05 per 1,000 emails. Verified nonprofits pay $9.50 plus the same rate.
Postmark includes 100 emails a month in its recorded free tier. Free tier: 100 emails/month
No free tier recorded for SendGrid.
Which one when
Postmark
Postmark runs some of the strictest sending policies in the industry, which is exactly why its inbox placement reputation is outstanding. If deliverability is the priority, sending your newsletters with Postmark through GoodPostal gets you their inbox record and a full campaign platform in one move.
Postmark separates transactional and broadcast sending; GoodPostal sends campaigns through a broadcast message stream so your transactional reputation stays untouched.
Postmark handles list unsubscribes natively on broadcast streams, and GoodPostal places the unsubscribe link inside your own email footer design rather than a bolted-on footer.
SendGrid
SendGrid is the household name in developer email, with infrastructure trusted at enormous scale. GoodPostal adds the email marketing layer, so you can design and send newsletters with SendGrid instead of building against its APIs.
GoodPostal registers a SendGrid event webhook for you, with your consent, and verifies its cryptographic signature on every incoming event before trusting it.
GoodPostal tracks your SendGrid quota and applies your overage protection setting: pause the campaign at the limit or let it continue, your choice, never a surprise.
What else should you know about Postmark and SendGrid pricing?
Which is cheaper at 10,000 emails a month, Postmark or SendGrid?
Postmark has the lower recorded total with GoodPostal. Postmark costs $15 a month on Basic 10K at 10,000 emails, or $35 including GoodPostal. SendGrid costs $20 a month on Essentials 50K at 10,000 emails, or $40 including GoodPostal.
What do Postmark and SendGrid cost at 100,000 emails a month?
Postmark costs $126 a month on Pro 50K at 100,000 emails, or $150 including GoodPostal. SendGrid costs $35 a month on Essentials 100K at 100,000 emails, or $59 including GoodPostal.
Does Postmark or SendGrid include free emails?
Postmark includes 100 emails a month in its recorded free tier. Free tier: 100 emails/month No free tier recorded for SendGrid. Postmark costs $15 a month on Basic 10K at 10,000 emails, or $35 including GoodPostal. SendGrid costs $20 a month on Essentials 50K at 10,000 emails, or $40 including GoodPostal.
What is the total with GoodPostal at 50,000 emails a month on Postmark and on SendGrid?
Postmark costs $55 a month on Basic 50K at 50,000 emails, or $77 including GoodPostal. SendGrid costs $20 a month on Essentials 50K at 50,000 emails, or $42 including GoodPostal.
Use the pricing data
Every recorded plan, email volume, monthly price, send allowance, and checked date, refreshed every Sunday. Free to use in articles, comparisons, and tools under the Creative Commons Attribution 4.0 license. Credit GoodPostal with a link.
Postmark
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