Comparison prevention

Comparison prevention is a deceptive pattern with no lie in it. Every number on the page can be accurate and every feature genuinely included, and the page still defeats the reader, because the options are arranged so that no two of them can be held against each other. One plan is priced monthly and the next annually. One lists seats and the next lists “fair use”. The feature rows appear in a different order in each column, or one column’s detail lives behind a link, or the middle tier quietly measures a different unit. Nothing is false. The comparison is simply not available.

The tell is asymmetry, not any single claim, which is why the pattern is easy to miss in review and easy to prove with a spreadsheet. Ask what question the page is meant to answer (usually “which of these is cheapest for me”) and then try to answer it by reading across rather than down. If answering requires arithmetic, a second tab, or a phone call, the arrangement is doing work against the reader. That test also catches the honest version of the same mess: a genuinely confusing pricing page built by three teams who never spoke is indistinguishable from a deliberate one, and it should be fixed for the same reason.

The instrument this pattern defeats is the comparison table, which is the whole reason a comparison table exists: one row per attribute, one column per option, the same unit all the way across, and the differences visible without a calculation. Build that and prevention becomes structurally difficult, because a missing cell or a mismatched unit is obvious in the grid. Break it and you have made a decision harder while looking generous, which is why Harry Brignull files this beside the rest of the dark patterns rather than under bad information design.

Enforcement has caught up in the places where the money is largest. Unit pricing rules in grocery, energy and telecoms exist precisely to force a shared denominator: price per hundred grams, per kilowatt hour, per month. Software has no such rule yet, so the honest move is voluntary and cheap. Pick one billing period, show the others as a toggle rather than a per-plan choice, name every feature the same way in every column, put every plan’s number on the page including the enterprise one, and state the unit that actually matters to a buyer. A reader who can compare and still chooses you has chosen you.