Keyword research tools compared
See how the main keyword tools handle search volume, difficulty scoring and UK-specific data before you commit to a subscription.
Compare keyword tools →SEO tools compared side by side, with the trade-offs left in
Head-to-head comparisons across keyword research, rank tracking, technical crawling and AI search visibility, built to show you where each tool actually earns its price and where a cheaper option does the job just as well. If you're weighing up whether a paid upgrade actually moved the needle, our A/B Test Significance Calculator can help you check whether the difference you're seeing in conversion rates is real or just noise. And if you're also sense-checking media spend alongside your SEO tool budget, our CPM / CPC Benchmark Comparator gives indicative UK ranges across Google Search, Meta, LinkedIn, TikTok, programmatic display and YouTube, so you can compare a quote against what the market typically charges.
Read the Latest Tool Reviews and Guides Check Keyword Difficulty for FreeFind the right comparison for your job
Each guide sets tools side by side on pricing, data and real limitations, so you can pick the right one for the job.
Rank trackers compared
Weigh up accuracy, update frequency and cost per keyword across the rank trackers UK teams actually use day to day.
Compare rank trackers →Technical SEO crawlers compared
Crawl speed, log file analysis and how each tool surfaces indexability issues on sites of different sizes.
Compare crawlers →AI search visibility tools compared
How different tools track whether your content gets cited in AI-generated answers, and what that data can and can't tell you.
Compare AI visibility tools →A/B test significance calculator
Once a comparison points you towards a change, use this calculator to see whether the resulting shift in conversion rate is actually significant, with a 95% confidence interval.
Run the calculator →CPM / CPC benchmark comparator
Pick a channel and industry vertical to see indicative UK CPM and CPC ranges, useful for sense-checking a quote from an agency or platform.
Check ad cost benchmarks →How these comparisons are built
The criteria and process behind every head-to-head on this site, including where the limits of testing sit.
Read the methodology →How these comparisons are put together
This page groups comparisons by the job you're trying to do, not by tool brand, because most people arrive already knowing whether they need to track rankings, research keywords, crawl a site for technical faults, or check how they show up in AI-generated answers. Each comparison page then works through the tools that do that job, with pricing, the features that actually matter day to day, and the limitations vendors tend not to mention on their own pricing pages.
The four categories
- Rank tracking: which tool to use for monitoring where your pages sit in Google UK results, and how often each one updates. See Rank Trackers Compared.
- Keyword research: database size, keyword difficulty scoring, and how the free options stack up against the paid ones. See Keyword Research Tools Compared.
- Technical SEO crawling: tools for finding indexability problems, crawl budget waste, and site-wide issues before they cost you traffic. See Technical SEO Crawlers Compared.
- AI search visibility: newer tools built for tracking how brands and pages appear in AI-generated answers. See AI Search Visibility Tools Compared.
What each comparison actually covers
Every page in this section follows the same shape: pricing tiers as they stand at time of writing, the features that separate one tool from another, what each tool struggles with, and which use case it suits best. A tool that's the right call for a freelancer managing three client sites is often the wrong call for an in-house team running weekly audits across fifty domains, and the comparisons try to say so.
Picking the right tool is only half the job. Once you've made a change on the back of what a rank tracker or crawler tells you, whether that's a rewritten title tag, a new landing page, or a shift in on-page copy, the next question is whether it actually moved conversions rather than just rankings. If your site runs any kind of ecommerce or lead-gen traffic, our A/B Test Significance Calculator is worth a look for checking whether a difference in conversion rate between two versions is a real effect or just noise, using a standard 95% confidence interval.
SEO tooling is usually one line in a wider marketing budget, and most practitioners end up justifying that spend against what the same money would buy on paid channels. If you're weighing an SEO tool subscription against a Google Search or Meta campaign, or just want to sense-check a quote an agency has sent you, our CPM / CPC Benchmark Comparator gives indicative UK CPM and CPC ranges by channel and industry, along with a note on what tends to drive the variance. It won't tell you what your specific campaign will cost, but it's a reasonable starting point for a conversation.
Where the criteria come from
The approach behind these comparisons, including how tools are shortlisted and what gets checked, is set out on the methodology page. Some links on comparison pages are affiliate links, and that's disclosed on the affiliate disclosure page.
Still weighing up which tool to trust with your budget?
New comparisons and updated pricing go up as tools change, so it's worth checking back before you commit to a subscription. If you're also running tests on landing pages or pricing, our A/B Test Significance Calculator uses a Z-score test with a 95% confidence interval to show whether a change in conversion rate is real or just noise. And if you're sense-checking a media quote from an agency or platform, the CPM / CPC Benchmark Comparator gives indicative UK cost ranges by channel and industry vertical, with a note on what typically drives the variance, so you can weigh what you've been quoted against the wider market.