Free plans only

5 Best Free SEO Tools of 2026

By the Rankozo research desk · Updated November 4, 2026

5 of the 9 tools in our best seo tools ranking offer a permanent free plan. Rank Math scores highest among them at 8.5 out of 10.

1. 01

   Rank Math

   WordPress site owners who want on-page SEO and keyword tracking for a few dollars a month.

   Free plugin; PRO billed annually (USD check pending)

   Full entry, No. 1 overall

   Paid from

   Free plan

   Score 8.5

2. 02

   Ahrefs

   SEOs and marketers who need backlink and competitor data.

   Ahrefs Free for site owners; Starter $29 per month; Lite $129, Standard $249, Advanced $449 per month

   Full entry, No. 2 overall

   Paid from

   $29

   Score 8.4

3. 03

   Semrush

   Marketing teams that want SEO, PPC research and AI visibility in one subscription.

   Free account with 10 reports a day; SEO plan from $117.33 per month billed annually ($139 monthly); 7-day free trial

   Full entry, No. 4 overall

   Paid from

   $117.33

   Score 8.3

4. 04

   Mangools

   Beginners and bloggers who mainly need keyword research.

   See vendor pricing (USD check pending)

   Full entry, No. 5 overall

   Paid from

   Free plan

   Score 8.2

5. 05

   Screaming Frog SEO Spider

   Technical SEOs and developers auditing sites of any size.

   Free version up to 500 URLs; paid licence $279 per user per year

   Full entry, No. 7 overall

   Paid from

   $23.25

   Score 8.2

Scores and prices come from our Best SEO Tools ranking, which uses one method for every tool. Questions or corrections: editorial@rankozo.com