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Categories · Address Validation APIs

Smarty (US & International Address Verification) vs USPS Addresses API

Smarty (US & International Address Verification) and USPS Addresses API are both Address Validation APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. USPS Addresses API offers a free tier while Smarty (US & International Address Verification) does not, so USPS Addresses API is easier to trial before committing. On compliance, Smarty (US & International Address Verification) additionally documents SOC 2, HIPAA, GDPR. For coding-agent use, Smarty (US & International Address Verification) scores higher on agent-friendliness (50 vs 30).

Comparedby a transparent data-readiness score computed from each API's published, sourced fields. No reviews, no paid placement. How we rank.

Data last verified 2026-06-14, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
FieldSmarty (US & International Address Verification)USPS Addresses API
Starting price$50 month -
Pricing modelSubscriptionUsage
Free tier✗✓
Self-serve signup✓✓
SOC 2Type II·
HIPAA✓·
GDPR✓·
Webhooks✗✗
Sandbox✗✓
Documented actions184

Full data and citations: Smarty (US & International Address Verification) · USPS Addresses API. See more Address Validation APIs.