Best SEO optimisation tools, ranked on what each vendor publishes you can check

Four separate jobs get sold under the phrase SEO optimisation tool, and the reason buyers end up with the wrong subscription is that the phrase does not say which one they wanted. The four are: crawling your own site to find what is broken, researching which queries are worth a page, optimising the words on a page against the pages already ranking, and tracking what moved afterwards. A tool that is excellent at one of them is usually ordinary at the others.

So this page ranks on one criterion, stated here and applied to everybody including us: what does the vendor publish on its own page, today, that a buyer can check before paying? A published crawl limit, a named integration, a per engine cost. Not a review score, not a feature grid with ticks in it, and not a claim about results. Everything below was read on the vendor's own live page on 21 October 2026.

Why the published limit is the only fair way to order this list

Every suite in this category can produce a screenshot that makes it look like the leader. What separates them is the part written down in public: the number of URLs a free crawl covers, which engines a product reads, what one check costs. Those are facts a buyer can confirm in a browser in two minutes, and a vendor that publishes them is making a commitment rather than a claim.

Where a vendor publishes nothing checkable on a job, this page says so instead of guessing. And where a rival publishes more than we do, that is stated plainly further down, because an ordering that always ends with the author on top is not an ordering.

The four jobs, and which tool owns each one

What each vendor publishes, read on 21 October 2026

Screaming Frog is the clearest publisher in the category. Its page states the free limit, names every feature the licence unlocks, and even names the models behind its scripting feature: the feature list includes a custom JavaScript crawl with OpenAI and Gemini, which is a generation helper inside a crawl rather than a measurement of what an assistant says about you. That distinction matters, because the words look the same on a feature grid.

Semrush publishes the widest surface area. Its own navigation lists keyword research, competitor analysis, AI visibility, prompt research, local SEO, market analysis, content creation, technical site health, digital PR, rank tracking and marketing reports. Its news block states that Adobe has completed the Semrush acquisition and introduces Adobe Brand Visibility, described there as the first unified GEO solution bringing Semrush data together with Adobe's agentic tools. If you are signing a multi year deal, that ownership change is the fact to read before the feature list.

Ahrefs publishes the most specific numbers in the whole category on its Brand Radar page: an index described as 493 million or more monthly prompts, broken out by surface, and a sentence stating that a Claude check consumes 8 checks per update where other platforms consume one. A vendor willing to publish that its most expensive engine costs eight times a normal check is telling you how its bill works, which is rare.

Where the suites beat us, said plainly

On three of the four jobs above we are not a candidate and should not be. We do not sell a crawler, a keyword index or a content optimiser, and a buyer who arrived here wanting one of those should buy from the vendors named above. Our own rendered pricing page carries no SSO, no white label, no SOC 2 and no ISO line, and it covers one business per plan on everything except the agency tier. If procurement needs those, the suites are where they live.

On the fourth job Ahrefs beats us on reach: its Brand Radar index covers AI Mode and Copilot, which we do not read at all, and its published prompt counts per surface are far larger than anything we hold. Our own pricing page states the reverse side of that trade honestly, quoting a client's 88.4% on ChatGPT against 23.2% on Gemini as our own best result, which is the kind of number nobody publishes unless it is measured.

The optimisation that no suite on this list is measuring

Every tool above optimises a page for a ranked list of ten blue links. None of them tells you what happens when a buyer skips that list and types the question into an assistant instead, because that answer is written fresh for each asker and is different in each app.

That is a separate category of measurement and it is ours. AI Knows Us asks the buyer questions you choose, across ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews, and reports which businesses were named in the answer. Our pricing page publishes the arithmetic: one credit is one buyer question asked on one app once, most checks cost one credit, a Claude check costs three because Claude costs more to run, and the larger plans include a Visibility API. If the question you have is which SEO suite to buy, we are not on that shortlist. If the question is whether you are named at the moment somebody decides, that is the thing we measure and the suites do not measure the same way.

The content optimisation job above is the one buyers most often get wrong, and the honest route is to match the tool to the single job you use it for rather than to the longest feature list. That reasoning is worked through in full in our guide to Surfer SEO alternatives, matched to the job you actually use it for, which is worth the click for a second reason: we counted durable inbound links across 1,655 tracked pages on this site on 21 October 2026 and 696 of them had none at all, and that page was one of them.

Questions buyers ask before paying for SEO optimisation software

Is there one SEO optimisation tool that does everything?

Semrush and Ahrefs come closest, and both publish enough tools to cover crawling, research, tracking and reporting in one subscription. The gap in a single suite is almost always the content optimisation job and, now, the assistant naming job. Buy the suite for breadth and add a point tool for whichever single job you do daily.

Does optimisation software actually change my position?

The software finds the work and the work changes the position. A crawler that lists 40 missing titles has done its part; the writing and the fixes do the rest. Judge a tool on whether it produces a short, ordered ticket list you can act on this week, because that is the output that turns into a change.

Free or paid for a site under 500 pages?

Free covers it. Search Console plus PageSpeed Insights plus a free Screaming Frog crawl answers the technical questions completely at that size, and its published 500 URL limit is the number that tells you when free stops being enough.

What should I check on a vendor's page before I buy?

Four things, in this order: the limit that sets your tier, which integrations are named, what happens at the end of the term, and whether any number on the page is specific enough to be checked. A page full of adjectives and no numbers is the signal to keep reading.

How do I tell a real AI feature from a relabelled one?

Ask what the feature reads. A tool that uses a model to write alt text or draft a brief is using AI inside your workflow. A tool that measures whether an assistant names you reads the assistant's own answers, and a vendor doing that publishes the app names and the per app cost. Ahrefs publishes both on its Brand Radar page. We publish both on ours.