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Categories · Address Validation APIs

Melissa vs USPS Addresses API

Melissa 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. On compliance, Melissa additionally documents SOC 2, HIPAA, GDPR. For coding-agent use, USPS Addresses API scores higher on agent-friendliness (30 vs 20).

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)
FieldMelissaUSPS Addresses API
Starting price - -
Pricing modelHybridUsage
Free tier✓✓
Self-serve signup✓✓
SOC 2Type II·
HIPAA✓·
GDPR✓·
Webhooks✗✗
Sandbox✗✓
Documented actions264

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