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Independent directory. VektorIndex is not affiliated with or sponsored by any third-party vendor. (VektorIndex's own developer tools are also listed, identified by name.) All specifications are sourced from official vendor documentation and are not independently audited.
Note: Holm Security (NIS2 Cybersecurity Compliance) and Postmark (Email API) are in different software categories. This comparison may be relevant if you are evaluating them for overlapping use cases. For same-category comparisons, browse NIS2 Cybersecurity Compliance tools.

Head-to-Head Specification Audit

Holm Security vs Postmark

Critical Infrastructure & Mid-Market IT · European Union

NIS2 Cybersecurity Compliance

Holm Security

Critical Infrastructure & Mid-Market IT · European Union

Visit Holm Security

Email API

Postmark

SaaS Developers · Global

Visit Postmark

Specification Matrix

MetricHolm SecurityPostmark
Starting PriceCustom pricing$15/mo
API Rate Limit60 req/minNot confirmed
Target CountryEuropean UnionGlobal
CategoryNIS2 Cybersecurity ComplianceEmail API
Compliance (vendor-stated)NIS2, ISO 27001, GDPR, CIS Controls, DORAGDPR, SOC2
Hosting RegionsEU-North, EU-WestUS-East, EU-West
Native Integrations4 listed6 listedBetter

Holm Security — Key Specs

Vendor-stated
  • First vulnerability management platform with NIS2 compliance module
  • Combined network + web app + API scanning in one platform
  • Automated NIS2 Article 21 risk assessment reports
  • Continuous monitoring with 24-hour incident detection SLA
  • Swedish-headquartered — native EU data residency

Postmark — Key Specs

Vendor-stated
  • Average delivery time of 3.2 seconds — fastest transactional delivery benchmarked
  • Message Streams separate transactional from bulk email — protects domain reputation
  • GDPR-compliant EU-only sending available for EU data residency requirements
  • 10-year email storage and retrieval via Message Retention add-on

Frequently Asked Questions

Which is lower-priced, Holm Security or Postmark?+

Holm Security uses custom pricing. Postmark starts at $15/mo. Contact Holm Security directly for a quote.

Which compliance frameworks do Holm Security and Postmark list?+

Both list GDPR in their vendor documentation. Holm Security additionally lists NIS2, ISO 27001, CIS Controls, DORA. Postmark additionally lists SOC2. These are vendor-stated frameworks. VektorIndex has not independently audited these claims.

Which has a higher documented API rate limit — Holm Security or Postmark?+

Available information does not support a direct comparison of API rate limits for these tools. Check each vendor's developer documentation.

Which data hosting regions do Holm Security and Postmark support?+

Holm Security lists hosting regions: EU-North, EU-West. Postmark lists hosting regions: US-East, EU-West. For data residency requirements in European Union, confirm exact region configuration directly with each vendor.

Data last updated: 29 August 2026Sourced from official vendor documentation. Not independently audited. Report incorrect information

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