Sources and Citations
This page lists the data sources we use to score and review SEO agencies, and how each one is used.
Two kinds of rating, kept separate. Our own editorial score
(0–10) is the publisher's assessment; we do not collect user ratings ourselves. Separately, we display each
agency's Clutch rating — a third-party star rating submitted by that agency's clients on
Clutch — as clearly attributed context.
The two are never conflated, and Clutch ratings are never marked up as our own structured-data rating.
About Clutch data. Clutch figures shown on this site were collected from public
Clutch profiles and reflect a snapshot in time; current numbers may differ. Some agencies have no Clutch profile, in
which case no Clutch rating is shown. Last collected 2026-05-30.
Data sources
| Source | What it provides | How we use it |
|---|---|---|
| Agency websites and case-study pages | Primary descriptions of services, pricing models, and documented outcomes. | Used to assess results, services, and positioning for each review. |
| Public company information | Founding year, headquarters location, and leadership. | Used to populate fast-facts tables. Subject to change. |
| Published case studies | Outcome claims and client results published by the agency. | Weighted under the results and case-studies criterion, with attention to evidence quality. |
| Agency reporting and service documentation | How agencies report results and structure engagements. | Used to assess transparency, value, and support. |
| Search and AI-retrieval observation | How agencies and their content appear in search and AI answers. | Used to assess visibility and AI-search readiness where relevant. |
| Clutch (clutch.co) | Third-party, client-submitted star ratings, review counts, pricing, team size, founding year, location, and client-feedback summaries. | Displayed on review pages and the top-100 list as clearly attributed third-party context. Never used as our own rating or marked up as our aggregateRating. |
Primary sources
Wherever possible we link directly to each agency's own website and case studies from its review page. Those are the primary sources for service, pricing, and outcome claims.
Accuracy and corrections
Factual fields such as founding year and location come from public company sources and may change. If you find an error, email [email protected] and we will review it.
Last updated 2026-05-30.