MailerSend vs Postmark
A comparison of MailerSend and Postmark built from values read directly from each provider's own documentation, with the source recorded against every figure.
The short answer
- Pick MailerSend if
- Teams sending email and SMS from one provider who need a longer activity window than a debugging log — 30 days of activity data against 7 days of API logs is a distinction the rest of this category does not draw.
- Pick Postmark if
- Teams that need to answer "what happened to this message" weeks later — 45 days of retention as standard, extendable to a year, is the longest window in this set.
5 sourced criteria separate them:
- Entry paid plan
- MailerSend: $31.50/month for Starter, billed $378 a year. Professional is $99/month, billed $1,188.
- Postmark: $15.00/month for Basic at the 10,000-email tier. Postmark prices by volume, so the figure rises with the slider.
- Pricing model
- MailerSend: Volume plans quoted in USD, EUR or GBP, with SMS metered separately from email and a 500,000 daily API request ceiling on Professional. Annual billing is twelve months at a discount rather than ten.
- Postmark: One monthly price per volume tier, chosen on a slider, covering both sent and received email. Overage rates improve as the plan gets larger.
- Emails included
- MailerSend: 50,000 a month on both Starter and Professional — the plans differ on features and SMS allowance rather than email volume.
- Postmark: 10,000 a month at the $15 Basic tier. The plan price scales with volume — 50,000, 125,000, 300,000, 700,000 and 1.5M are the published steps. The free tier is 100 a month.
- Price per 1,000 over
- MailerSend: $1.30 per 1,000 emails on both Starter and Professional.
- Postmark: $1.80 per 1,000 on Basic, $1.30 on Pro and $1.20 on Platform. The free tier allows no overage at all.
- Log retention
- MailerSend: Two windows, which no other provider here separates: 7 days of API logs and 30 days of activity data on Professional; 7-day activity data on Starter.
- Postmark: 45 days on Basic. Pro and Platform default to 45 days and can be raised to 365.
Pick the criteria you care about. The chart counts how many of them lean toward each provider — the same read as scanning the bars below, just totalled for the ones you chose.
MailerSend 0
Postmark 0
At a glance.
| Criterion | MailerSend | Postmark |
|---|---|---|
| Pricing | ||
| Entry paid plan | $31.50/month for Starter, billed $378 a year. Professional is $99/month, billed $1,188. | $15.00/month for Basic at the 10,000-email tier. Postmark prices by volume, so the figure rises with the slider. |
| Pricing model | Volume plans quoted in USD, EUR or GBP, with SMS metered separately from email and a 500,000 daily API request ceiling on Professional. Annual billing is twelve months at a discount rather than ten. | One monthly price per volume tier, chosen on a slider, covering both sent and received email. Overage rates improve as the plan gets larger. |
| Emails included | 50,000 a month on both Starter and Professional — the plans differ on features and SMS allowance rather than email volume. | 10,000 a month at the $15 Basic tier. The plan price scales with volume — 50,000, 125,000, 300,000, 700,000 and 1.5M are the published steps. The free tier is 100 a month. |
| Price per 1,000 over | $1.30 per 1,000 emails on both Starter and Professional. | $1.80 per 1,000 on Basic, $1.30 on Pro and $1.20 on Platform. The free tier allows no overage at all. |
| Log retention | Two windows, which no other provider here separates: 7 days of API logs and 30 days of activity data on Professional; 7-day activity data on Starter. | 45 days on Basic. Pro and Platform default to 45 days and can be raised to 365. |
Where they differ.
Entry paid plan
- MailerSend
- $31.50/month for Starter, billed $378 a year. Professional is $99/month, billed $1,188.
- Postmark
- $15.00/month for Basic at the 10,000-email tier. Postmark prices by volume, so the figure rises with the slider.
Sources (2) →Sources ↓
- Pricing — MailerSend ↗
“Starter [...] $ 31.50 /month $378.00 billed yearly [...] Professional [...] $99.00 /month $1,188.00 billed yearly”
Read 2026-09-06 · official pricing
- Pricing — Postmark ↗
“How many emails do you send and receive each month? 10,000 emails [...] Basic $15.00/mo”
Read 2026-09-06 · official pricing
Pricing model
- MailerSend
- Volume plans quoted in USD, EUR or GBP, with SMS metered separately from email and a 500,000 daily API request ceiling on Professional. Annual billing is twelve months at a discount rather than ten.
- Postmark
- One monthly price per volume tier, chosen on a slider, covering both sent and received email. Overage rates improve as the plan gets larger.
Sources (2) →Sources ↓
- Pricing — MailerSend ↗
“USD EUR GBP [...] 50,000 emails /month 150 SMS /month Extra usage $1.30 /1,000 emails [...] 500,000 daily API requests”
Read 2026-09-06 · official pricing
- Pricing — Postmark ↗
“How many emails do you send and receive each month? [...] Basic $15.00/mo [...] Pro $16.50/mo [...] Platform $18.00/mo”
Read 2026-09-06 · official pricing
Emails included
50,000 a month on both Starter and Professional — the plans differ on features and SMS allowance rather than email volume.
10,000 a month at the $15 Basic tier. The plan price scales with volume — 50,000, 125,000, 300,000, 700,000 and 1.5M are the published steps. The free tier is 100 a month.
Sources (2) →Sources ↓
- Pricing — MailerSend ↗
“Starter [...] 50,000 emails /month 100 SMS /month [...] Professional [...] 50,000 emails /month 150 SMS /month”
Read 2026-09-06 · official pricing
- Pricing — Postmark ↗
“10,000 50,000 125,000 300,000 700,000 1,500,000 More [...] Basic $15.00/mo [...] Test your integration with 100 emails/month”
Read 2026-09-06 · official pricing
Price per 1,000 over
- MailerSend
- $1.30 per 1,000 emails on both Starter and Professional.
- Postmark
- $1.80 per 1,000 on Basic, $1.30 on Pro and $1.20 on Platform. The free tier allows no overage at all.
Sources (2) →Sources ↓
- Pricing — MailerSend ↗
“Extra usage $1.30 /1,000 emails”
Read 2026-09-06 · official pricing
- Pricing — Postmark ↗
“Extra emails @ $1.80 / 1,000 [...] Extra emails @ $1.30 / 1,000 [...] Extra emails @ $1.20 / 1,000 [...] No overages allowed in this plan.”
Read 2026-09-06 · official pricing
Log retention
Two windows, which no other provider here separates: 7 days of API logs and 30 days of activity data on Professional; 7-day activity data on Starter.
45 days on Basic. Pro and Platform default to 45 days and can be raised to 365.
Sources (2) →Sources ↓
- Pricing — MailerSend ↗
“7-days API logs retention [...] 30-day activity data retention [...] 7-day activity data retention”
Read 2026-09-06 · official pricing
- Pricing — Postmark ↗
“45-day data retention [...] Customizable data retention up to 365 days (45-day default)”
Read 2026-09-06 · official pricing
When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.
Which should you choose?
Choose MailerSend if…
Teams sending email and SMS from one provider who need a longer activity window than a debugging log — 30 days of activity data against 7 days of API logs is a distinction the rest of this category does not draw.
Editorial · Palash Bagchi · approved
Choose Postmark if…
Teams that need to answer "what happened to this message" weeks later — 45 days of retention as standard, extendable to a year, is the longest window in this set.
Editorial · Palash Bagchi · approved
Consider something else if…
- MailerSend: Both paid tiers include the same 50,000 emails, so paying three times more buys features rather than volume, and the entry price is the highest here.
- Postmark: The included volume is small for the price and overage is the most expensive here at $1.80 per 1,000 on the entry plan.
Documented by only one.
These criteria are published by one provider and not the other. An absence here means we have not found a source, not that the feature is missing.
Questions this comparison answers.
Entry paid plan: MailerSend or Postmark?
MailerSend: $31.50/month for Starter, billed $378 a year. Professional is $99/month, billed $1,188.
Postmark: $15.00/month for Basic at the 10,000-email tier. Postmark prices by volume, so the figure rises with the slider.
Should I choose MailerSend or Postmark?
Pick MailerSend if Teams sending email and SMS from one provider who need a longer activity window than a debugging log — 30 days of activity data against 7 days of API logs is a distinction the rest of this category does not draw.
Pick Postmark if Teams that need to answer "what happened to this message" weeks later — 45 days of retention as standard, extendable to a year, is the longest window in this set.