Head-to-Head Specification Audit
Postmark vs Tenable One
SaaS Developers · Global
Specification Matrix
| Metric | Postmark | Tenable One |
|---|---|---|
| Starting Price | $15/mo | Custom pricing |
| API Rate Limit | Not confirmed | 300 req/min |
| Target Country | Global | Global |
| Category | Email API | NIS2 Cybersecurity Compliance |
| Compliance (vendor-stated) | GDPR, SOC2 | NIS2, DORA, ISO 27001, SOC2, CIS Controls, NIST CSF |
| Hosting Regions | US-East, EU-West | US-East, EU-West, AP-Southeast |
| Native Integrations | 6 listedBetter | 5 listed |
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
Tenable One — Key Specs
Vendor-stated- ✓44,000+ customers globally — largest vulnerability management install base
- ✓Covers OT/ICS systems — critical for NIS2 essential services
- ✓AI-powered attack path analysis predicts what attackers will target next
- ✓Pre-built NIS2 and DORA compliance dashboards
- ✓Integrates with 200+ security tools
Frequently Asked Questions
Which is lower-priced, Postmark or Tenable One?+
Tenable One uses custom pricing. Postmark starts at $15/mo. Contact Tenable One directly for a quote.
Which compliance frameworks do Postmark and Tenable One list?+
Both list SOC2 in their vendor documentation. Postmark additionally lists GDPR. Tenable One additionally lists NIS2, DORA, ISO 27001, CIS Controls, NIST CSF. These are vendor-stated frameworks. VektorIndex has not independently audited these claims.
Which has a higher documented API rate limit — Postmark or Tenable One?+
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 Postmark and Tenable One support?+
Postmark lists hosting regions: US-East, EU-West. Tenable One lists hosting regions: US-East, EU-West, AP-Southeast. For data residency requirements in Global, confirm exact region configuration directly with each vendor.
Data last updated: 29 August 2026 — Sourced from official vendor documentation. Not independently audited. Report incorrect information
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