Melissa vs Smarty (US & International Address Verification)

Melissa and Smarty (US & International Address Verification) are both Address Validation APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Melissa offers a free tier while Smarty (US & International Address Verification) does not, so Melissa is easier to trial before committing. For coding-agent use, Smarty (US & International Address Verification) scores higher on agent-friendliness (50 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)
Field	Melissa	Smarty (US & International Address Verification)
Starting price	-	$50 month
Pricing model	Hybrid	Subscription
Free tier	✓	✗
Self-serve signup	✓	✓
SOC 2	Type II	Type II
HIPAA	✓	✓
GDPR	✓	✓
Webhooks	✗	✗
Sandbox	✗	✗
Documented actions	26	18

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