Tested, not listed.

AI marketing and SEO tools, run against the same keywords and scored against the real Google top 10. We publish numbers, not feature lists, and only after we’ve run the test.

Latest test

Surfer SEO · 2026-08-24

Surfer SEO Review (2026): All 20 Fixture Keywords — Its Content Score Did Not Track Google Rank

-0.102
Score ↔ rank (ρ)
Mean Spearman vs. real Google (us), 96 pages, strict URL match; −0.044 with truncated truth URLs rescued (107 pages), 2026-08-24
0.16
Term precision@30
First 30 terms in Surfer's own order, 20 keywords, 2026-08-24
85%
SERP overlap
vs. real Google (us) top 10, 2026-08-24
0.75
Day-two term overlap
Jaccard, 5 keywords re-run 25.61–25.81h later; scores held (mean |Δ| 1.43), 2026-08-25

One finding now covers 4 tools and 276 scored pages: does a content score predict Google rank?

What we found

Some results hold across every tool we ran, so each gets its own page: how much of a term list the ranking pages actually share, and how much of that list is still there the next morning.

The content optimization tools sit in one table on best content optimization tools — five tested, no winner, no overall score.

Why this exists

Most “best AI tools” pages are affiliate lists nobody tested. We run every tool against the same frozen keyword fixture and measure it against what the current top 10 actually contain. If a tool’s score doesn’t predict rank, we say so. If we haven’t tested it, the page says that instead of guessing.

  • Every published number comes from a scripted run, and we keep the raw responses on our side.
  • Every number carries its sample size, its method and the date we took it.
  • What we could not test gets its own section, on every page.

Read the full methodology, or who we are and how we make money.

In the queue
MarketMuse