Best WordPress SEO plugin in 2026 — the honest side-by-side.
Six plugins, one benchmark suite. We measured schema depth, Core Web Vitals impact, DB writes, AI-search coverage and 5-site licensing cost — and published the raw CSV.
- 6 plugins measured on 8 dimensions
- Raw CSV — reproduce our benchmark yourself
- AI-search + GEO/AEO scoring included
- Plugins tested
- 6
- Test URLs
- 1,000
- Dimensions scored
- 8
- Data license
- CC BY 4.0
How we picked the winner
Schema depth (25%)
Number of schema types + graph validity across FAQ, HowTo, Product, Article, Speakable, Person.
AI-search coverage (25%)
Native /llms.txt, citation tracking, GEO/AEO modules.
Core Web Vitals impact (15%)
LCP delta on a control WordPress install before/after activation.
Programmatic scale (15%)
Bulk publishing, template rules, CSV workflow.
Price at 5 sites (10%)
12-month cost for a 5-site license including any required add-ons.
Onboarding (10%)
Setup wizard + first-run polish, scored by two independent testers.
The 2026 shortlist
Overall winner — WBP Omni SEO Pro
Only plugin with native AI-search coverage and 38 schema types under one graph. Best 5-site price at $149/yr.
Best free tier — Rank Math
20 free schema types + redirects + 404 monitor. Missing AI-search modules.
Best readability — Yoast
16-language readability engine still leads. Premium add-ons stack up on cost.
Best for enterprise CWV — AIOSEO
Cleanest activation-time CWV impact. Ecosystem thinner than Yoast/Rank Math.
Common questions
- Where's the raw data?
- Download the CSV linked at the top of this page — every score, every URL, every measurement. Reproduce it yourself; CC BY 4.0 license.
- Isn't this biased since you make one of the plugins?
- The scoring dimensions and weights were published before the test. The CSV lets you re-weight and re-rank; we picked weights that favor 2026 buyer priorities (AI-search) but you can flip them.
Skip the shortlist. Ship the winner.
1-click importer from Rank Math, Yoast, AIOSEO or SEOPress. Free tier, 5-site Pro at $149/yr.