A comparison keyword is a search in which someone weighs two or more options against each other before choosing one. Typical patterns are “X vs Y”, “X or Y”, “X alternatives”, “best X for Y” and “X compared with Y”.
How comparison keywords work
The person typing “Xero vs QuickBooks for a sole trader” already knows what they need. They have narrowed the field to a short list and want help deciding. That places the search firmly in the commercial investigation stage of search intent: further along than a “what is cloud accounting” search, not yet at “buy Xero”.
The patterns vary in what they reveal:
- “A vs B” means both options are on the list and the searcher wants the differences that matter to them.
- “A alternatives” usually means the searcher is unhappy with A, or finds it too expensive, and is open to switching.
- “Best X for Y” means they know the category and want a recommendation for their own situation, such as “best CRM for a small estate agency”.
Comparisons are not limited to software. A homeowner searching “air source heat pump vs gas boiler” or a buyer searching “conveyancing solicitor vs licensed conveyancer” is making the same kind of decision. The results Google shows for these searches tend to be articles, tables and forum threads rather than product pages, which tells you what format is expected.
Why it matters
Comparison searches often have modest volumes, but the people behind them are close to a decision. A page that helps them decide well earns trust at exactly the point they are about to commit, and it can be the last thing they read before they enquire or sign up. For a UK business with a clear point of difference, a comparison page can be one of the best-performing pages on the site relative to its traffic.
They also matter defensively. If people search “[your brand] vs [competitor]” and the only answers are written by the competitor or an affiliate site, someone else frames the choice for your prospects. Having your own honest account, with the facts checked, at least puts your version in the results.
There is a compliance angle too. Comparisons with an identifiable competitor fall under the CAP Code rules on comparative advertising, which the ASA enforces, and in a business-to-business setting under the Business Protection from Misleading Marketing Regulations 2008. Claims must be accurate, verifiable and compare like with like.
Common mistakes
- Writing a sales page in disguise. If every row of the table ends with “we win”, readers notice and leave. Say where the other option is the better fit.
- Stale facts. Prices, plans and features change. An out-of-date comparison misleads readers and can breach advertising rules.
- Splitting one comparison across several pages. “A vs B” and “B vs A” are the same intent. Separate pages for each order create keyword cannibalisation.
- Ignoring the “for whom”. A comparison that never says which type of buyer each option suits leaves the reader where they started.
How to act on it
Start with the questions you already hear on sales calls: “how are you different from X?” and “why not just use Y?” Those are your comparison keywords in spoken form. Check the wording people use in search with a keyword tool or Search Console, then group variants so each comparison gets one page. Record the decision in your keyword mapping so nobody writes a duplicate later.
Build each page around the decision rather than the product. Open with a short verdict (“choose A if you need payroll built in; choose B if you are VAT registered and want the simpler app”), then a table of the differences that matter, then the detail. Date the page, cite where prices came from, and set a reminder to review it whenever either side changes its pricing.
Comparison content sits naturally inside a wider content plan. If you want help deciding which comparisons are worth writing and how they connect to your service pages, that is part of my content SEO and strategy work.