DataForSEO Brain

Semrush (competitor data source)

3 min read

Semrush (competitor data source)

The all-in-one marketing SaaS: own crawler, large keyword/backlink DBs, Business-plan-gated API with per-line units. Sits under DataForSEO Brain → Entities.

Overview

Semrush is an all-in-one SEO + PPC + content + social platform, evaluated here as a programmatic data source against ent-dataforseo. It combines its own web crawler (~10 billion pages/day), the Google Ads API, third-party clickstream, and data-aggregator partnerships. Its strength is breadth of finished marketing metrics, white-label reporting, and a wide set of geo databases; like ent-ahrefs it gates API access behind a paid subscription seat.

Reported scale & methodology

  • Backlink index 43+ trillion; keyword database ~27.9 billion.
  • Clickstream panel of ~200 million devices across desktop and mobile.
  • Keyword volume blends Google Ads API + own clickstream; an internal 2022 study claimed Semrush volume was closest to Search Console data.
  • 142+ geo databases; Google-centric SERP coverage with the Sensor + SERP-features filter.

API & pricing model

  • Standard API requires the Business plan ($499.95/mo) plus purchased units.
  • Per-line units: organic keywords ~10 units/line live, ~50 units/line historical; units reset monthly with no rollover.
  • The per-line unit counts are the stable, official-aligned figures; the 0.00005/unit, another ~$0.01/unit) and should be treated as a range.

AI-search coverage

  • AI Overviews and related AI surfaces are tracked via the AI Visibility Toolkit ($99/mo add-on) and Semrush Sensor.
  • Semrush’s AIO study found AI Overview incidence oscillating from ~6.5% of keywords (Jan 2025) to ~25% (Jul) before settling ~15% (Nov 2025) - useful context for cap-geo-ai-search-optimization.

When to use / how it fits

Gotchas / limits

  • Business-plan floor (~$500/mo) plus metered units make it expensive purely for programmatic access.
  • Units reset monthly with no rollover (use-it-or-lose-it spend).
  • Heavy variant grouping inflates head-term volumes relative to other tools, contributing to the well-known 30%-200% tool-to-tool volume discrepancies.

As a programmatic source

  • The Business-plan gate plus per-line units make Semrush costly for pure API consumption; live keyword lines (~10 units) are cheaper than historical (~50 units).
  • Breadth (SEO + PPC + social + content), white-label reporting, and 142+ geo databases are the value, not raw per-call price.

Practical notes

  • The AI Visibility Toolkit and Sensor are add-ons layered on the suite, mirroring how DataForSEO exposes AI surfaces via cap-ai-optimization-api.
  • Use Semrush when a team wants finished, multi-channel marketing metrics in one place rather than a raw data feed.

Coverage notes

  • 142+ geo databases give strong international reach; SERP tracking is Google-centric via the Sensor.
  • Backlink (43T+) and keyword (~27.9B) indexes are among the largest, a depth advantage over DataForSEO’s raw index.
  • The clickstream panel (~200M devices) underpins Semrush’s claim of Search-Console-close volume.
  • Like Ahrefs, its AI-search coverage is a paid add-on layered on the suite rather than a raw API surface.

Sources

Graph View

Backlinks