Authorize.net vs Square Payments

Authorize.net and Square Payments are both Online Card Payment APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. On compliance, Square Payments additionally documents SOC 2. For coding-agent use, Square Payments scores higher on agent-friendliness (65 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 2026-06-21, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	Authorize.net	Square Payments
Starting price	$0.10 transaction	$0.30 transaction + percent
Pricing model	Hybrid	Hybrid
Free tier	✗	✗
Self-serve signup	✓	✓
SOC 2	-	Type II
HIPAA	✗	·
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✓	✓
Documented actions	26	26

Full data and citations: Authorize.net · Square Payments. See more Online Card Payment APIs.