Ahrefs API vs Semrush API

Ahrefs API and Semrush API are both Backlink Data APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Ahrefs API starts lower at $449 per month vs $455.67 for Semrush API. On compliance, Ahrefs API additionally documents SOC 2. For coding-agent use, Ahrefs API scores higher on agent-friendliness (50 vs 40).

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 2026-06-06, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	Ahrefs API	Semrush API
Starting price	$449 month	$455.67 month
Pricing model	Hybrid	Hybrid
Free tier	✗	✗
Self-serve signup	✓	✓
SOC 2	In progress	·
HIPAA	·	·
GDPR	✓	✓
Webhooks	✗	✗
Sandbox	✗	✗
Documented actions	71	149

Full data and citations: Ahrefs API · Semrush API. See more Backlink Data APIs.