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Disclaimer: Star Stack provides information about European technology services for educational purposes only. Service listings, sovereignty assessments, and recommendations do not constitute legal, financial, or professional advice. We encourage you to verify all information independently and consult appropriate professionals before making technology decisions. Star Stack is not affiliated with any listed services unless explicitly stated.

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Postmark | Star Stack

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Postmark

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Postmark

Name: Postmark
Author: Star Stack

Transactional email delivery service with API and SMTP

Email (Transactional)

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About

Postmark is an email delivery service that sends transactional messages via API or SMTP. It separates promotional traffic from transactional streams to ensure high deliverability and includes built-in analytics and inbound email handling.

Resources

No migration guide is currently listed for this service.

Suggest a migration guide or report an outdated link.

Sovereignty Score

Recorded assessment version: jurisdiction-ownership-2026-10-04

out of 100

Data completeness50% (Partial)

Jurisdictional(56%)

Significant foreign legal exposure risk

Jurisdiction: United States (EU adequacy decision)
No foreign parent provider
Five Eyes intelligence alliance exposure
US CLOUD Act applies (US can compel data access regardless of storage location)

Ownership(44%)

Significant foreign ownership or control risk

Public company (US exchange)
Funding: Acquired by ActiveCampaign 2022
Acquired by another company
Acquisition risk unknown (assumed high) (Submit verified data to improve this score)

More dimensions coming soon

GovernanceComing soon

PortabilityComing soon

LicenseComing soon

CommunityComing soon

How missing data affects scores Submit data corrections

Provider

Postmark

Quick Facts

Legal jurisdiction: United States
Headquarters: United States
Ownership: Public (US)
Funding: Acquired by ActiveCampaign 2022

Evidence and freshness

Verification date unknown. This assessment needs review.

A score is an assessment of recorded facts. Missing evidence and unresolved ownership can affect the result.

Ownership: other
Statement 12/02/2026, confidence 90%.
Read evidence notes
From enrichment pipeline 2026-02-06_03-32-59_c6_v20-validation