Pick Grammarly if…
you write emails, documents and messages all day and want mistakes and tone fixed as you go.
Grammarly checks what you write as you type, everywhere you type. QuillBot rewrites text you already have — paraphrasing, summarizing, humanizing. Most people need one more than the other.
Pick Grammarly if you want real-time grammar, spelling and tone fixes across apps — the free plan covers the basics. Pick QuillBot ($19.95/mo) if you mainly rework existing text; its free plan's 125-word limit means you'll upgrade quickly.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| Grammarly | Yes | $30/mo | $30/mo | Non-native and casual writers who want real-time grammar, tone, and clarity fixes everywhere they type |
| QuillBot | Yes | $19.95/mo | $19.95/mo | Students and ESL writers polishing and paraphrasing existing text rather than generating new content |
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 October 7, 2026
| Grammarly | QuillBot | |
|---|---|---|
| Main job | Real-time grammar, spelling and tone checks | Paraphrasing, summarizing, AI humanizer |
| Free tier | Grammar & spelling, tone detector, 100 AI prompts/mo | Paraphrase up to 125 words, 6 humanizer uses/day |
| Paid plan | Pro: full-sentence rewrites, 2,000 AI prompts/mo | Premium: unlimited paraphrasing in 9+ modes, AI chat |
| Plagiarism check | Included in Pro, plus AI-text detection | Premium: 25,000 words/mo |
you write emails, documents and messages all day and want mistakes and tone fixed as you go.
you're a student or ESL writer reworking existing text and want unlimited paraphrasing and summaries.
Only on annual billing for most people: the monthly list price ($30/mo) is steep next to free chatbots that also rewrite text, and annual billing cuts it by more than half.
Not reliably — humanized output can still trip AI detectors, so don't rely on it where AI use isn't allowed.
Yes. QuillBot's Team plan is billed annually per seat at $7.50/mo for small teams, cheaper still for larger ones. Grammarly's team features sit in Pro or a custom-quoted Enterprise plan.
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.