Best SEO Tools of 2027

What separates the best SEO tools on this page?

Price is not the dividing line. SE Ranking costs $119 and scores 8.6. Ahrefs costs $129 and scores 8.3. The gap comes from what each tool does with your data.

Backlink index size splits the field. Ahrefs found 186 of our 200 known backlinks. Semrush found 171. Moz Pro found 148. Serpstat found 118. Ubersuggest found 89. SE Ranking found 132. If link research is your main job, that spread matters more than any feature list.

Keyword tracking limits split it again. SE Ranking gives you 2,000 tracked keywords and three seats at $119. Ahrefs gives you 750 keywords and one seat at $129, with extra seats at $50 each. Semrush charges $139.95 for one seat and $45 per extra seat. Moz Pro's $49 entry plan tracks 50 keywords. Ubersuggest tracks 125. Serpstat tracks 1,000 at $59.

Two members do not compete on data volume at all. Google Search Console is free and shows actual impressions, clicks and average position from Google, plus indexing reports and Core Web Vitals from real user data. It only covers sites you verify. Screaming Frog SEO Spider costs $20 and found 43 issues on our test site that the cloud audits missed, including three redirect chains. It has no keyword data, no rank tracking and no backlinks.

What should you check before buying an SEO tool?

Our scoring weighted index size and data accuracy at 30, feature coverage at 25, usability and reporting at 15, limits and fair use at 10, and value at 20. Run your own shortlist against those weights.

• Seats and keyword limits. A cheap plan with one seat costs more once your team grows. Check the per-seat price before you commit.
• Backlink coverage. Ask how many of your known links a tool finds. A sample is not an index.
• Keyword database depth. SE Ranking and Serpstat are thinner outside major markets. Semrush tracked Google Ads figures most closely on head terms.
• Reporting. SE Ranking includes white-label reports and client logins. Moz Pro writes explanations for people still learning.
• API access. Serpstat includes API credits on every plan, not just enterprise tiers.

For agencies and consultants

SE Ranking suits client work: three seats, 2,000 tracked keywords and white-label reporting at $119. Semrush suits teams that also run paid search, display, social and PR, with local listings as an add-on.

For link research and competitor analysis

Ahrefs has the largest backlink index in the test and Site Explorer answers a competitor question in about three clicks. Ahrefs Webmaster Tools is free for sites you verify.

For technical audits

Screaming Frog SEO Spider crawls any size site for £199 (about $259) a year and connects to Search Console, Analytics and PageSpeed. It runs on your machine, so a big crawl needs memory.

For beginners and small sites

Moz Pro starts at $49 with Domain Authority and Moz Local. Ubersuggest costs $29 and is the only member selling a lifetime licence. Google Search Console is free and should sit under whichever paid tool you pick.

For client reporting on a budget, SE Ranking gives you three seats, 2,000 tracked keywords and white-label reports at $119. Ahrefs is the pick when backlink research drives your work, and Screaming Frog SEO Spider handles technical crawls the cloud audits miss. Beginners can start with Moz Pro at $49 or Ubersuggest at $29, with Google Search Console free underneath.