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SMTP2GO vs Postmark

SEPT 2026 audit

A comparison of SMTP2GO and Postmark built from values read directly from each provider's own documentation, with the source recorded against every figure.

Reviewed by Palash BagchiUpdated 14 criteria comparedSources last checked

The short answer

Choose SMTP2GO if…

Steady sending where the overage rate matters more than the plan fee — $0.85 per thousand on Professional is the lowest published here, and 30 days of reporting comes on every paid tier rather than as an upgrade.

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…

  • SMTP2GO: A dedicated IP needs the $75 Professional plan, and the entry tier's 10,000 emails is a quarter of what Resend includes for twice the price.
  • 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.

Neither quite fits? Every other option, ranked by iScore: SMTP2GO alternatives · Postmark alternatives

6 sourced criteria separate them — see where, with sources, below.

Visit SMTP2GO documentationVisit Postmark documentation

No affiliate links, sponsored placements or paid rankings appear on this site. Ordering follows the sourced data and the stated criteria.

01.

At a glance.

CriterionSMTP2GOPostmark
Pricing
Free tierYesYes
Kind of free offerFree tierFree tier
What the free plan includes
1,000 emails a month.
100 emails a month on the Developer tier, intended for testing an integration rather than production sending.
Credit card to startNoNo
Entry paid plan
$10/month for Starter, or $100 a year. Professional is $75/month.
$15.00/month for Basic at the 10,000-email tier. Postmark prices by volume, so the figure rises with the slider.
Pricing modelMonthly or annual volume plans — the annual price is ten months' worth — with per-thousand overage that improves on the larger plan, and SMS billed alongside email.One monthly price per volume tier, chosen on a slider, covering both sent and received email. Overage rates improve as the plan gets larger.
Email
Emails included
10,000 a month on Starter and 100,000 on Professional. The free plan allows 1,000.
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 per thousand on Starter, falling to $0.85 on Professional — the cheapest published overage of any provider here.
$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
30 days of email reporting, on Starter and Professional alike rather than rising with the plan.
45 days on Basic. Pro and Platform default to 45 days and can be raised to 365.
Dedicated IPLimitedLimited

Only criteria both providers publish appear here; a tinted cell marks a real difference. Criteria only one of them documents are listed below, and an absence there means we found no source — not that the feature is missing. How we source this.

The small bar above a value is inetGeek's own lean toward that side — computed from the same facts shown, never a number the provider published. See the picker below "The short answer" to weigh only the criteria you care about.

02.

Where they differ.

What the free plan includes

SMTP2GO

1,000 emails a month.

Postmark

100 emails a month on the Developer tier, intended for testing an integration rather than production sending.

Sources (2) →

Entry paid plan

SMTP2GO
$10/month for Starter, or $100 a year. Professional is $75/month.
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) →

Pricing model

SMTP2GO
Monthly or annual volume plans — the annual price is ten months' worth — with per-thousand overage that improves on the larger plan, and SMS billed alongside email.
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) →

Emails included

SMTP2GO

10,000 a month on Starter and 100,000 on Professional. The free plan allows 1,000.

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.

Sources (2) →

Price per 1,000 over

SMTP2GO
$1 per thousand on Starter, falling to $0.85 on Professional — the cheapest published overage of any provider here.
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) →

Log retention

SMTP2GO

30 days of email reporting, on Starter and Professional alike rather than rising with the plan.

Postmark

45 days on Basic. Pro and Platform default to 45 days and can be raised to 365.

Sources (2) →

When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.

Confirm by email; unsubscribe from any issue. Your address goes to Kit and nowhere else — what we do with it.

03.

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 — except where we say we read the other provider's own page on a given date and it does not state it. Those rows lean, and the provider can correct them with a link.

When the free offer endsPostmark: Never — the free Developer plan does not expire.
Inbound emailPostmark: Limited
Support on entry paid planSMTP2GO: Ticket, chat and phone support on Starter ($10/month), the cheapest plan.
GDPR / data residencyPostmark: States its compliance, data protection and information security teams prepared its services for GDPR.
04.

Questions this comparison answers.

Entry paid plan: SMTP2GO or Postmark?

SMTP2GO: $10/month for Starter, or $100 a year. Professional is $75/month.

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 SMTP2GO or Postmark?

Pick SMTP2GO if Steady sending where the overage rate matters more than the plan fee — $0.85 per thousand on Professional is the lowest published here, and 30 days of reporting comes on every paid tier rather than as an upgrade.

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.

Provider pages

SMTP2GOSMTP relay and email API with volume plans, 30 days of reporting on every tier and the lowest published overage rate in this set.PostmarkTransactional email service priced by monthly volume, with configurable log retention and inbound processing.

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Comments

Every page here is sourced and dated.