Start with the length of a typical document rather than your monthly volume. The per-scan cap determines whether a piece goes through in one pass, and that affects output quality more than any other setting.
If your documents run under 1,500 words, the free plan handles them whole — 2,000 words a month is roughly one essay. Between 1,500 and 5,000 words, Writer at $18 a month is the first plan that takes them in one go.
Studio at $29 raises the per-scan cap to 15,000 words, which covers a dissertation chapter or a long report. Team at $59 removes the per-scan cap entirely and adds 5 seats.
Annual billing is 40% off, so Writer works out at $10.80 a month paid yearly. That is a real discount rather than a rounded one — the figure on the pricing page is exact.
Mostly volume: how many words a month, and how long a single document can be. One capability is paid — the sentence map, which highlights every scored line in your own text. Free reports the overall score, its confidence, the headline signals and how many sentences landed in each band. All three tones and no ads are on every plan, Free included.
Start on the free plan and move up when a limit gets in your way. It is genuinely usable rather than a demonstration, and it is a better guide to which tier you need than any estimate you make in advance.
One thing that should not affect the decision: none of the tiers unlocks a better rewriter or a more accurate detector. You are buying volume and document length, not quality. Any vendor whose cheaper tier produces deliberately worse output is running a different kind of business.