Head-to-Head Specification Audit
Sansan vs Postmark
Japanese Enterprise Sales Teams · Japan
Specification Matrix
| Metric | Sansan | Postmark |
|---|---|---|
| Starting Price | Custom pricing | $15/mo |
| API Rate Limit | 100 req/min | Not confirmed |
| Target Country | Japan | Global |
| Category | CRM | Email API |
| Compliance (vendor-stated) | APPI, ISO27001 | GDPR, SOC2 |
| Hosting Regions | JP-Tokyo | US-East, EU-West |
| Native Integrations | 4 listed | 6 listedBetter |
Sansan — Key Specs
Vendor-stated- ✓The de-facto business card digitisation platform in Japan — used by 8,000+ enterprises
- ✓AI extracts data from meishi (名刺) in both Japanese and English
- ✓Integrates with Salesforce — maps Japanese relationship hierarchy
- ✓APPI-compliant data management for Japanese enterprise buyers
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, Sansan or Postmark?+
Sansan uses custom pricing. Postmark starts at $15/mo. Contact Sansan directly for a quote.
Which compliance frameworks do Sansan and Postmark list?+
Sansan additionally lists APPI, ISO27001. Postmark additionally lists GDPR, SOC2. These are vendor-stated frameworks. VektorIndex has not independently audited these claims.
Which has a higher documented API rate limit — Sansan 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 Sansan and Postmark support?+
Sansan lists hosting regions: JP-Tokyo. Postmark lists hosting regions: US-East, EU-West. For data residency requirements in Japan, 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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