Pick QuillBot if…
you're a student or ESL writer reworking existing text and want paraphrasing, summaries and plagiarism checks in one place.
They solve different problems. QuillBot rewrites text, through paraphrasing, summarizing and humanizing, so it's aimed at people reworking material that already exists. ProWritingAid analyses your own long-form writing and reports on pacing, overused words and readability. They overlap on grammar checking, and that's where a direct comparison helps.
Pick QuillBot (Premium at $19.95/mo) if you need to paraphrase or summarise sources and want plagiarism checks included. Pick ProWritingAid (Premium at $30/mo monthly, much less billed annually) if you're editing your own manuscript and want detailed style reports.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| QuillBot | Yes | $19.95/mo | $19.95/mo | Students and ESL writers polishing and paraphrasing existing text rather than generating new content |
| ProWritingAid | Yes | $30/mo | $36/mo | Novelists, academics, and bloggers who want in-depth style reports (pacing, overused words, readability) on full manuscripts |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated November 2, 2026
| QuillBot | ProWritingAid | |
|---|---|---|
| Main job | Paraphrasing, summarizing, AI humanizer | Grammar and style reports on long-form writing |
| Free tier | Paraphrase up to 125 words, basic grammar check | 500 words per check, core suggestions |
| Main paid plan | Premium: unlimited paraphrasing, AI chat | Premium: unlimited words, 20+ reports |
| Plagiarism check | Premium: 25,000 words/mo | Not included; bought separately |
| Integrations | Browser-based rewrite suite | Desktop app, Word, Google Docs, Scrivener |
you're a student or ESL writer reworking existing text and want paraphrasing, summaries and plagiarism checks in one place.
you write long pieces yourself, such as novels, papers or blog series, and want to tighten style across the whole document.
QuillBot for paraphrasing and summarising sources, with plagiarism checks on Premium. ProWritingAid for polishing your own thesis or long essays.
On monthly billing QuillBot Premium ($19.95/mo) costs less than ProWritingAid Premium ($30/mo). Billed annually the two are close, and ProWritingAid also sells a lifetime licence.
That isn't its focus. ProWritingAid suggests grammar and style improvements and produces in-depth reports, while QuillBot is built to rewrite text in 9+ paraphrasing modes.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.