SEO Tools
Each tool here has a free version with tight limits: Screaming Frog crawls up to 500 URLs per crawl, Moz gives 10 Link Explorer queries a month, Semrush allows 10 reports a day, and Ahrefs' free plan works only for sites whose ownership you verify.
Best for technical SEOs who audit large or JavaScript-heavy sites from their own computer
Screaming Frog SEO Spider is a desktop crawler for Windows, macOS and Linux that audits websites for technical SEO issues. The free version stops at 500 URLs per crawl, and a paid license costs $279 per user a year.
Free plan
paid from $23.25/mo
Best for in-house marketers tracking a few sites' rankings and crawl issues week to week
Moz Pro is an SEO suite for in-house marketers and small agencies, with keyword research, link data, weekly rank tracking and site crawls. Each Campaign tracks one site and three competitors, and Moz doesn't say what yearly plans cost after year one.
Free plan
paid from $49/mo
Best for marketing teams that want daily rank tracking and competitor research in one login
Semrush is an online marketing platform for in-house teams and agencies, combining keyword, competitor and backlink research with daily rank tracking and site audits. Each plan includes one user, and extra users cost $45 to $100 a month.
Free plan
paid from $117.33/mo
Best for SEO teams and agencies that research competitors' backlinks and keywords
Ahrefs is an SEO platform for marketers and agencies that research backlinks, keywords and competitors on any website. Starter and Lite charge a credit for each report opened or filter applied, while Standard and higher give every user unlimited credits.
Free plan
paid from $29/mo
Keep browsing
SEO Tools by the numbers
$39/mo
Median starting price
50%
Offer a free trial
100%
Have a free plan
4
Products tracked
Computed from the published pricing of the 4 SEO Tools products in this list. Pricing last checked against vendor pages October 4, 2026.
Write a review and help the next team choose. Every review is read by a moderator before it's published, and we never pay for reviews.
Write a review