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A transactional email API/SMTP specialist built for password resets, receipts, and notifications, now owned by ActiveCampaign.

SaaS·Medium complexity·Founded 2010·Full review: Verified 2026-08-18
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Best for

Developers and product teams that need reliable, fast, well-monitored delivery of application-triggered email (password resets, order confirmations, alerts) via API or SMTP.

Worst for

Teams that need a marketing campaign builder, contact/list management, visual automation workflows, landing pages, or signup forms — Postmark has none of these and points marketing needs to its sibling product, ActiveCampaign.

Pricing

ModelSend-volume-tiered No source Unverified
Free planYes — 100 emails/month, no overages allowed. Never expires, no credit card required. Source ↗ Verified 2026-08-18
Annual discount0%

Postmark's pricing page states annual plans are not currently offered, though the company says it is 'looking at introducing' them in the future.

Source ↗ Verified 2026-08-18

Three paid plans (Basic $15/mo, Pro $16.50/mo, Platform $18/mo) all start at 10,000 emails/month included, and differ mainly by feature limits (custom sending domains, message streams, servers, users, data retention) and by their per-1,000-email overage rate ($1.80 / $1.30 / $1.20 respectively) rather than by included volume. There is no volume selector; the base price is flat for the first 10,000 emails and overages are billed at the end of the cycle. Enterprise/very-high-volume senders are quote-only via sales. Optional add-ons: dedicated IP ($50/mo per IP, requires 300,000+ emails/month), Custom Activity Retention (from $5/mo), DMARC Monitoring (from $14/mo per domain).

Official pricing page ↗

Capabilities

Marketing emailNo

Postmark's 'Broadcast' Message Streams technically permit bulk/newsletter-type sends (each must include an unsubscribe link) and separate them from transactional traffic for deliverability, but there is no campaign builder, audience/list management UI, or contact segmentation tool — the sending application must build the email and manage recipients itself. This is sending infrastructure, not a marketing-email product, so marketing_email is recorded as false; see the transactional_email/note and automation/segmentation fields for the same distinction.

Source ↗ Verified 2026-08-18
Transactional emailNative

This is Postmark's core, entire product.

Source ↗ Verified 2026-08-18
SMTP relayNative

SMTP is offered as a first-class alternative to the REST API, described as 'a fast, reliable, care-free replacement for SMTP.'

Source ↗ Verified 2026-08-18
REST APIYes Source ↗ Verified 2026-08-18
WebhooksYes

Covers delivery, bounce, open, click, spam complaint, subscription-change, and inbound events; up to 10 webhook URLs per stream.

Source ↗ Verified 2026-08-18
AutomationNone

No visual workflow/automation builder of any kind; sends are triggered entirely by the customer's own application code.

Source ↗ Verified 2026-08-18
SegmentationNone

No contact database or audience segmentation tooling — Postmark has no concept of a stored contact list.

Source ↗ Verified 2026-08-18
A/B testingNo

No native A/B/split-testing feature; a 2016-era third-party integration (Sendwithus) offered this but Postmark itself does not.

Source ↗ Verified 2026-08-18
SMSNone

No SMS product found anywhere on postmarkapp.com.

Source ↗ Verified 2026-08-18
Landing pagesNone

No landing-page builder; the footer directs marketing-site needs to sibling product ActiveCampaign.

Source ↗ Verified 2026-08-18
FormsNo

No native signup/subscribe form builder.

Source ↗ Verified 2026-08-18
Deliverability toolsAdvanced

Automatic bounce and spam-complaint handling, DKIM/SPF/DMARC setup guidance, a dedicated DMARC monitoring tool (paid add-on, from $14/mo per domain on postmarkapp.com/pricing), Message Streams to isolate sending reputation by traffic type, and optional dedicated IPs.

Source ↗ Verified 2026-08-18
Dedicated IPPaid add-on

Starts at $50/month per IP; only available to customers sending 300,000+ emails/month.

Source ↗ Verified 2026-08-18

Ecommerce

ShopifyVia integration

No native Shopify app on postmarkapp.com; connected via Zapier or custom API/webhook integration built by the merchant.

Source ↗ Verified 2026-08-18
WooCommerceVia integration

No first-party WooCommerce plugin from Postmark; routed via WordPress SMTP plugins (e.g. WP Mail SMTP, ShopMagic) or Zapier that connect to Postmark's SMTP/API.

Source ↗ Verified 2026-08-18
MagentoVia integration

No first-party Magento extension from Postmark; third-party Magento 2 SMTP extensions (e.g. Plumrocket, Mageplaza) or Zapier connect to Postmark's SMTP/API.

Source ↗ Verified 2026-08-18
Product recommendationsNo

Not a marketing/ecommerce product; no such feature exists.

Source ↗ Verified 2026-08-18
Abandoned cartNo

No native ecommerce event tracking or cart-abandonment triggers; would have to be built by the customer's application and sent as a transactional message.

Source ↗ Verified 2026-08-18
Revenue attributionNo

No revenue/purchase-attribution reporting found; Postmark's analytics cover delivery/open/click/bounce events only, not ecommerce revenue.

Source ↗ Verified 2026-08-18

Integrations

CountNot verified Source ↗ Verified 2026-08-18
NotableZapier, Wordpress, Slack, Stripe, Activecampaign, Customer.io, Supabase, Figma Source ↗ Verified 2026-08-18

Support

Support channelsEmail, Chat

Live chat Monday-Friday 9am-6pm EST via Help > Ask > Chat; email support otherwise (average response under 3 hours). No phone support found; not available 24/7.

Source ↗ Verified 2026-08-18
SLANot verified No source Unverified
Free plan supportNot verified

No first-party page found that explicitly states whether free-plan accounts receive the same support access as paid accounts. Support pages describe channels without mentioning plan-based gating, but that is not a positive confirmation. See reports/needs-verification.md.

No source Unverified

Compliance

GDPR DPAYes

Signable DPA incorporating Standard Contractual Clauses, offered to all customers.

Source ↗ Verified 2026-08-18
EU data residencyNo

First-party FAQ states: 'Postmark is a US-based company and we also store our data in the US, including personal data of our customers.' No EU hosting option is offered.

Source ↗ Verified 2026-08-18
SOC 2No

First-party support article states: 'Even though Postmark itself has not undergone a SOC audit, our data center has.' Postmark's data center (Deft) holds SOC 1/SOC 2 accreditation, but Postmark as a company has not obtained its own SOC 2 report — recorded as false to reflect Postmark's own status, not its data center's.

Source ↗ Verified 2026-08-18