DataForSEO Brain

Ahrefs (competitor data source)

3 min read

Ahrefs (competitor data source)

The backlink-led incumbent: largest link index, subscription-plus-units API, strong analyst UI. Sits under DataForSEO Brain → Entities.

Overview

Ahrefs is an all-in-one SEO suite evaluated here strictly as a programmatic data source competing with ent-dataforseo. It runs three data pipelines: its own crawler AhrefsBot (the second-most-active crawler after Googlebot, ~5 million pages/minute, ~6B pages/day), third-party clickstream panels, and Google Keyword Planner for keyword volume. Its differentiator is link-index depth and a trusted analyst dashboard, both of which DataForSEO does not try to match directly.

Reported scale (official “Big Data”)

  • 35 trillion live backlinks, refreshed every 15-30 minutes.
  • ~28.7 billion keywords; ~500.4 million referring domains; ~20.1 billion content pages; 217 locations.
  • Runs on in-house hardware: ~662,000 CPU cores, 3 PB RAM, 504 PB SSD.
  • Link-count methodology is documented officially (how Ahrefs counts links).

API & pricing model

  • Revamped API v3 (late 2025): plans from ~10,000/mo, typically on top of a paid subscription seat.
  • Unit model: base 50 units/request + per-row cost (1 unit/row standard, up to 5-10 for high-value fields); Standard plan ~150,000 units/mo; overage ~1.00 per 1,000 rows.
  • Practitioner estimate of combined entry: ~449 + API). Treat the exact API floor as approximate (secondary aggregator sourced).
  • Rate limit reported at ~60 requests/minute, versus DataForSEO’s 2,000/minute.

Keyword volume & AI coverage

  • Search Volume leans on clickstream + own smoothing, then blends Keyword Planner. Ahrefs’ own study found its volume “roughly accurate” for ~60% of tested keywords vs Search Console impressions, vs ~45% for Google Keyword Planner.
  • Google-centric SERP coverage. AI Overviews / AI Mode / ChatGPT / Perplexity / Copilot / Gemini are tracked via the Brand Radar add-on (~243M prompts) at 699/mo, a premium layer rather than raw API SERP scrapes.

When to use / how it fits

Gotchas / limits

  • Subscription seat plus metered units make Ahrefs costly as a pure programmatic data source.
  • Lower rate limit (~60 req/min) constrains high-throughput pipelines vs DataForSEO.
  • AI-search visibility sits behind paid add-ons, not the base API.

As a programmatic source

  • API v3 returns rows you pay for per request plus per row; high-value fields cost more units, so naive bulk pulls get expensive fast.
  • The trusted link index and analyst UI are the product; raw cost-per-row is not where Ahrefs competes.

Practical notes

  • Brand Radar (AI-visibility) and the core API are separately priced add-ons on top of a subscription seat.
  • For backlink-led deliverables where index depth is the headline, Ahrefs remains the benchmark this brain measures DataForSEO against (cap-backlinks-api).

Coverage notes

  • Google-centric SERP coverage; AI-search visibility is a Brand Radar add-on, not the base API.
  • AhrefsBot is the second-most-active crawler after Googlebot, underpinning the index-freshness claim (links refreshed every 15-30 minutes).
  • ~217 locations and in-house hardware (~662,000 CPU cores) support the scale figures.

Sources

Graph View

Backlinks