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Categories · Address Validation APIs

PostGrid Address Verification vs USPS Addresses API

PostGrid 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 PostGrid Address Verification does not, so USPS Addresses API is easier to trial before committing. On compliance, PostGrid Address Verification additionally documents SOC 2, HIPAA, GDPR. For coding-agent use, PostGrid Address Verification scores higher on agent-friendliness (40 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)
FieldPostGrid Address VerificationUSPS Addresses API
Starting price$18 month -
Pricing modelHybridUsage
Free tier✗✓
Self-serve signup✓✓
SOC 2Type II·
HIPAA✓·
GDPR✓·
Webhooks✗✗
Sandbox✓✓
Documented actions144

Full data and citations: PostGrid Address Verification · USPS Addresses API. See more Address Validation APIs.