Paid SEO tools are the subscription software, such as Semrush, Ahrefs, SE Ranking and a Screaming Frog licence, that gives you three things the free tools don't: data on other people's sites, history beyond Search Console's 16 months and full crawls of sites over 500 URLs. They're worth paying for when you have one of those three jobs to do, and for one-off jobs a single month's subscription is often enough, not a year.
The real question, in the UK as elsewhere, is how much you can get done without paying: "semrush free" gets 320 searches a month and "semrush free trial" 210, while "ahrefs free" gets 260 and "ahrefs webmaster tools" another 210 (average of September 2025 to August 2026, Google Ads data via DataForSEO, checked on 10 October 2026).
People who search like that have already worked one thing out: the suites cost money. What they usually don't know is exactly what they're buying when they move to a paid plan.
And that's where three mistakes happen:
- paying for a whole year for an audit that's done in a week;
- buying two suites that do the same job;
- assuming a tool's free version is "the same thing, with a limit", when sometimes three quarters of the features are missing.
And how do you know?
Because on the projects we work on, both ways of working sit side by side. For Macropix, a Milan-based maker of LED screens, we compared its 2020 rankings on Google Italy with those of 2025: "monitor pubblicitario" (advertising monitor) from position 88 to 2, "ledwall" (4,400 searches a month in Italy) from nowhere to first. That comparison comes from Semrush. Search Console couldn't have done it, because it keeps 16 months of data.
For Sunscape, which develops solar farms in Italy, we measured the growth of the first six months with the free tool: organic impressions from 329 to 5,809 a month, all in Search Console. That measurement didn't need a subscription.
In this guide you'll find:
- what the first paid plan unlocks on four tools, item by item;
- our test on 20 UK small business sites against Screaming Frog's free limit;
- the minimum cost of six SEO jobs, and when an annual subscription pays for itself.
Let's start.
What you buy when you pay for an SEO tool (three kinds of data the free tools don't give you)
An SEO subscription buys data you can't collect yourself. It comes in three kinds, and it's worth knowing which one you need before you open a pricing page.
The first is data on other sites. Search Console shows your own site's queries and clicks, measured by Google, and nothing about your competitor. The free versions of the suites stop at the same line: Ahrefs Free only works on sites you've verified as your own, and Semrush's free plan gives you one demo project and 10 reports a day.
The second is history. Search Console's performance report keeps 16 months of data, since Google extended it in 2018. To see what a site looked like three or five years ago you need the suites' databases, and even there history is sold in steps: on Ahrefs it's 1 month on Starter, 6 months on Lite, 2 years on Standard and 5 on Advanced (Ahrefs price list and help centre, summarised in our page on Ahrefs pricing).
The third is scale. The free version of Screaming Frog stops at 500 URLs per crawl; the Search Console API returns at most 25,000 rows per request. On a brochure site you won't notice; on a product catalogue you will.
What about traffic estimates? Aren't they the reason to pay?
They're estimates built on panels and databases, and should be read as such. One example from the US market: the author of DailyDime wrote in June 2026 that Semrush's estimates for his site consistently read higher than what GA4 recorded, and kept a single paid SEO tool, Ahrefs Starter at $29, for competitors' backlinks. It's one site, not a study. But the reasoning holds in the UK too: you pay for data you don't have, not for an estimate of data you already have.
The first paid plan, item by item (Screaming Frog unlocks 24 features out of 31)
An SEO tool's first paid plan removes quantity limits and, in some cases, switches on features that simply aren't in the free version. On 10 October 2026 we read the official pricing pages and help centres of four tools and set out what changes.
| Tool | What you get at no cost | What the first plan unlocks | Price of the first plan |
|---|---|---|---|
| Screaming Frog | 500 URLs per crawl, 7 features out of 31 | No URL limit, all 31 features | £199 a year per user |
| Ahrefs | Verified sites only: 1,000 backlinks and keywords visible, 5,000 audit credits a month | Starter: data on any site, 200 credits a month, 250 rows per report, 1 month of history, 50 tracked keywords | $29 a month (about £21.93), monthly only |
| Semrush | 1 demo project, 10 reports a day | SEO plan: 5 sites, 500 tracked keywords | $139 a month (about £105.10), $117.33 billed annually |
| SE Ranking | 14-day trial | Core: 10 projects, 2,000 tracked keywords | $129 a month (about £97.54), $103.20 billed annually |
Three things the table shows that tool roundups don't.
With Screaming Frog the difference isn't just the 500-URL limit. In the official comparison the free version has 7 features out of 31: broken links, titles and meta data, robots directives, hreflang, exact duplicates, XML sitemaps and visualisations. Left out, among others, are JavaScript rendering, structured data validation, Search Console and Analytics integration, and saving crawls. The FAQ confirms it: without a licence, crawls can't be saved and the configuration is restricted. How we use it, licence included, is in our page on Screaming Frog.
We'll say it against ourselves too: in our roundup of the best SEO tools we wrote that the free version keeps all the analysis features. Today's comparison says it keeps less than a quarter of them.
Ahrefs Free is more generous than people think, but only on your own site. A verified site gets 5,000 audit credits a month without paying anything. The line is drawn elsewhere: Starter is the first plan that opens up competitors' data, and it does so with 250 rows per report and no exports.
SE Ranking and Semrush mostly charge for the number of sites and keywords. Both list their prices in US dollars, before VAT. The full comparison of price lists, with UK VAT, is in our page on Semrush pricing.
The test: 20 UK small business sites against the 500-URL limit (3 go over, 3 have no sitemap)
Screaming Frog's free limit is enough for most small business sites in the UK: in our sample, only 3 sites out of 20 declare more than 500 pages. But 3 have no readable sitemap, and for those you can't know the number without crawling them.
The method. On 10 October 2026 we searched Google UK from a phone for five typical businesses (plumber in Manchester, dentist in Leeds, plastic injection moulding services, farm stay in the Cotswolds, accountant in Bristol) and took the first four business websites on page one (local pack or organic results), skipping directories, marketplaces and listing portals. For each one we read the XML sitemap given in robots.txt or at the standard paths, and counted the URLs it declares.
| Sector | Sites in the sample | Pages in the sitemap (smallest to largest) | Over 500 | No readable sitemap |
|---|---|---|---|---|
| Plumber, Manchester | 4 | 5, 9, 18, 2,185 | 1 | 0 |
| Dentist, Leeds | 4 | 59, 155, 543 | 1 | 1 |
| Plastic injection moulding services | 4 | 20, 67, 145 | 0 | 1 |
| Farm stay, Cotswolds | 4 | 17, 210, 257 | 0 | 1 |
| Accountant, Bristol | 4 | 28, 79, 121, 974 | 1 | 0 |
| Total | 20 | median 79 across the 17 sites with a sitemap | 3 | 3 |
So the free version is enough?
For counting pages, almost always. But three details change the answer.
The three sites over the limit aren't single small firms: an online plumbing booking service with 2,185 pages, a dental group with practices in ten towns (543) and an accountancy firm with offices in more than one city (974). The dental group is just 43 pages over the line, so a single crawl of its site would stop before the end.
The sitemap only counts what the site declares. A crawler follows links, and usually finds more addresses: pagination, tags, old pages nobody removed. The count in the table is the minimum.
On the 3 sites without a sitemap, crawling is the only way to know what's there. And there you only find the limit when you hit it. If your site is in that position, our guide to crawling explains what to look at first.
Cost per job: six SEO jobs and the least you can spend on each (an annual plan pays for itself after about 10 months)
The right way to judge a paid tool is to start from the job, not the tool: every job has a minimum spend, and for one-off jobs that spend is a month. This is our table, built on the official price lists.
| Job | The free tools are enough if | Minimum paid spend | One-off or ongoing |
|---|---|---|---|
| Technical audit of your own site | The site has fewer than 500 URLs, or you verify it in Ahrefs Free | £199 for a Screaming Frog licence | One-off |
| A competitor's keywords | 10 reports a day on Semrush's free plan are enough for you | £0 with a 7-day trial cancelled in time, or $29 (about £22) for a month of Ahrefs Starter | One-off |
| A competitor's backlinks | Never: the free versions only show your own | $29 for Ahrefs Starter (250 rows), $129 (about £98) for Lite (2,500 rows) | One-off |
| Rank tracking | Search Console's average position is enough for you | $1,238.40 (about £936) a year for SE Ranking Core billed annually (2,000 keywords) | Ongoing |
| Comparison over several years | 16 months are enough for you | $249 (about £188) for a month of Ahrefs Standard (2 years of history) | One-off |
| Several sites or clients | The sites are yours and verified: Ahrefs Free has no limit on sites | $1,290 (about £975) a year for Ahrefs Lite billed annually (5 projects on any site) | Ongoing |
Four jobs out of six are one-offs. It's the point that never makes it into the tool rankings.
Then there's the sum on annual billing. SE Ranking Core costs $129 a month or $1,238.40 a year: annual only makes sense if you'd use it for at least 9.6 months. On Semrush the SEO plan costs $139 a month or $1,407.96 a year, so the break-even point is 10.1 months. On Ahrefs a year costs exactly ten monthly payments.
Three different tools, almost the same threshold: about 10 months out of 12. Below that, monthly costs less, even at full price.
Do people really pay for a year for a month's work?
It happens with migrations and with SEO audits before a redesign. Do the sum: an audit done on Semrush's annual plan costs $1,407.96, on a single month $139: ten times as much, for the same report.
About to pay for a year for a month's work?
An audit done on an annual plan costs ten times one done on a single month. Before you renew, we'll look together at which data you actually need and which tool gets it out, with no extra subscriptions.
Book a strategy consultationTrials, cancellations and refunds: where money gets lost (and the day to put in your diary)
An SEO tool's trial usually lasts 7 to 14 days and, on some tools, turns into a subscription on its own if you don't cancel first. That's where people spend without meaning to, and the rules change from tool to tool.
- Semrush: 7-day trial, after which the first payment is taken automatically. The refund policy excludes month-to-month subscriptions: only a first annual purchase can be refunded, within 7 days.
- Ahrefs: no trial on the paid plans, and its terms say it has no obligation to give refunds unless the law requires it. The cautious way to try it is a month of Starter or Lite.
- SE Ranking: 14-day trial, with no credit card required.
- Screaming Frog: the licence lasts a year and is per user: two people, two licences.
The details for Semrush and Ahrefs, with sources, are in our pages on the two price lists. The practical rule is just one: put the day before the trial ends in your diary, and before you start the trial, write the list of what you need to pull out, so the days go on work and not on exploring the menus.
And if I need two different things, do I buy two suites?
Hardly ever. Distribb says the same in its guide to paid tools, updated in August 2026: the typical mistake is buying two research suites, because Ahrefs and Semrush overlap enough that a second one rarely pays for itself. In our numbers the combination that holds up is one suite plus a crawler, and it's the same one you'll find in our guide to cheap SEO tools, where we worked out what it costs to track 100 keywords with 11 tools.
When not to pay (three cases where the free tools do everything)
You don't need a paid tool when the job only concerns your own site, the site is under 500 URLs and 16 months of history are enough. In those cases Search Console, the free version of Screaming Frog and Ahrefs Free cover almost everything.
The site is small and the question is "how am I doing?". That was Sunscape's situation in its first six months: page-one keywords from 1 to 38 out of 143, monthly organic clicks from 46 to 195. We read impressions and clicks in Search Console, and the path step by step is in our guide to how long SEO takes. What Google's tool really shows, and where it stops, is in our guide to Google Search Console.
The site has problems a tool won't fix. Pages written without looking at what people search for, empty product pages, no page for the services you sell. Measuring them better doesn't solve them.
You don't have the hours to use it. A $139-a-month subscription you open twice costs $70 (about £53) a session. For many businesses the real cost isn't the tool, it's the time of whoever uses it: we explain this in our guide to what SEO costs.
On the other hand, when you need to understand why a competitor outranks you, paying is almost unavoidable: that's the job of competitor analysis, and no free tool does it.
Frequently asked questions
It depends: if the site has fewer than 500 URLs and you only care how your own site is doing, Search Console, the free version of Screaming Frog and Ahrefs Free cover almost everything. Paying makes sense when you want to see a competitor's data or compare periods longer than 16 months.
It depends: for broken links, titles, redirects, hreflang and duplicates on a site under 500 URLs, yes. For JavaScript rendering, structured data validation, Search Console integration and saving crawls you need the licence, at £199 a year.
It depends: on SE Ranking, Semrush and Ahrefs, annual billing pays for itself after about 10 months of use. For an audit, a migration or a competitor analysis, monthly costs less, even at full price.
Yes, in a limited form: Semrush's free plan gives you one demo project and 10 reports a day, and Ahrefs Free only works on sites you verify as your own. For competitors' data you need a paid plan.
No. Two research suites overlap almost entirely: the combination that holds up is one suite plus a crawler. A second suite only makes sense if you work in markets the first one covers poorly.
Pay for the job, not the tool (and save the data before you cancel)
In short:
you pay for other people's data, for history beyond 16 months and for sites over 500 URLs;
the free version of Screaming Frog has 7 features out of 31;
14 of the 17 UK small business sites with a sitemap declare fewer than 500 pages;
four SEO jobs out of six are one-offs;
annual billing only pays off after about 10 months of use.
One detail decides whether the month you paid for was worth it: whatever you don't export before you cancel, you won't see again. And not every plan exports. According to Ahrefs' help centre, Starter allows no exports, while Lite goes up to 500,000 rows a month. If you're paying for a month to capture a competitor's backlinks or keywords, the right plan is the one that lets you take the file home, even if it costs more. Plan the export before you buy, not on the last day.
If you'd rather have the suites' data read by someone who uses them every day, that's the work of our SEO service, where access to the tools is already included.
Until next time!
