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Best free SEO and digital marketing tools compared, and where a free tier stops

A complete free stack for a small business, the published limit on each tier, and the three jobs where free genuinely runs out.

Published by AI Knows Us · Updated 22 October 2026

A small business can run a complete search and marketing operation on free tools, and the limit is not quality. The limits are scale, history and anybody else's data, and all three are published by the vendors if you read the right page. Here is the stack, then the three places where free genuinely stops and paying starts.

The criterion for inclusion: the tool is free in a way the vendor publishes, with a named limit rather than an unspecified trial. A thirty day trial is not a free tool, and a free tier whose ceiling is not published is one you discover at an inconvenient moment.

The free stack, with the published limit on each

JobFree toolThe published limit
What Google knows about your siteSearch ConsoleFree for any property you can verify. Its performance report documents search types of web, image, video and news, and data is retained for sixteen months.
Speed and layout stabilityPageSpeed Insights, and Lighthouse in ChromeFree with no account. Run it on a template rather than only the homepage, because one template fix usually covers hundreds of pages.
Structured dataRich Results Test and the Schema Markup ValidatorFree, no account, tested on the live URL.
Crawling your own siteScreaming Frog SEO Spider, free versionUp to 500 URLs in a single crawl, no sign up or email capture, with configuration, saved crawls, JavaScript rendering, custom extraction and the API integrations behind the annual licence.
Your own backlink profileAhrefs Webmaster ToolsFree for sites you can verify ownership of, which gives you a crawl plus your own links. Somebody else's profile is the paid product.
Keyword sizingGoogle Keyword PlannerFree with an Ads account. It reports one grouped figure per normalised set, so never add the phrasings inside a group.
Demand over timeGoogle TrendsFree, including a YouTube Search filter, which is the quickest honest answer to a seasonality question.
AnalyticsGoogle AnalyticsFree at small business volumes. It will never match Search Console exactly, because the two count different events.

The three places free actually runs out

First, somebody else's data. Google shows you your own property by design, and no amount of crawling your own server produces a competitor's backlink profile or keyword set. That requires a vendor's crawl of the whole web, and it is the clearest reason to pay anybody anything in this market.

Second, scale. Above a few thousand URLs the free crawl ceiling bites, and the published 500 URL limit on a single free crawl is the number that tells you when. Third, history and scheduling. A free tool runs when you remember. What a subscription buys is a crawl on Tuesday and a diff against last Tuesday, which turns an audit into a process.

Free marketing tools beyond search, briefly and honestly

Most marketing platforms offer a free tier and the useful question is always what the free tier is for. Email and newsletter platforms generally cap the list size or add their own branding, because the free tier is a sales funnel and they say so. Social schedulers cap the number of channels or queued posts. Design tools cap exports or brand assets. Form and survey tools cap responses.

None of that is a trick, and reading the cap before you build a workflow on it is the whole skill. A free tier you outgrow in a month has cost you a migration. The paid side divides on a line the free tiers hide: some website seo tools only report on your site and others change it, and anything that writes to your pages needs a different approval than anything that reads them.

The free check that is worth running before you buy any of this

Ask the question your best customer would ask, in ChatGPT, Gemini, Perplexity, Claude and Google's AI Overviews, leaving your own name out so you do not lead the answer, and write down which businesses get named. It costs nothing but five minutes and it tells you something no tool in the table above reports, because the answer is composed for each asker and is not stored anywhere for a crawler to find.

AI Knows Us is the version of that check which repeats and keeps the record, and our pricing page publishes a free scan on your own domain as the entry point. The costing is published too: one credit is one buyer question on one app once, most checks cost one credit, a Claude check costs three because Claude costs more to run. We sell nothing else in the table above and we are not a free SEO tool; we are the measurement next to it. Ahrefs reads more of the assistant surface than we do, including AI Mode and Copilot, and publishes its own cost of 8 checks per update for a Claude check.

Free tiers in the marketing stack all work the same way once you can see the model behind them, and the newsletter category is the clearest illustration: free newsletter platforms, and the three business models behind a free tier. Measured on 21 October 2026, 696 of 1,655 tracked pages on this site had no durable inbound link, and that page was one of them at 1,000 searches a month.

What people ask about free SEO and marketing tools

Can I do SEO entirely with free tools?

The technical work, yes, completely. The competitive work, no, because it needs an index you cannot build. That is the honest division and it is the same for everybody.

Are free tools limited on purpose?

Yes, and the vendors publish where. A free tier is a product decision rather than a courtesy, which is why the published ceiling is the most important line on any free tool's page.

Which free tool gives the most value for a small site?

Search Console, and it is not close. It is the only source of Google's own data about your site, covering indexing, queries, clicks, Core Web Vitals, structured data and manual actions in one place.

Is free SEO software safe to use on a client site?

Check what access it asks for before you connect anything. A tool that runs on your own machine against a public URL needs no access at all, which is one quiet advantage of a desktop crawler over a hosted one.

Is there a free way to see if AI assistants mention my business?

Yes, by asking them. Type the buyer question into each app without naming yourself and record the names in the answers. Do it twice a month and you have a trend line that cost you nothing.

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