Grammarly vs QuillBot

Grammar tools compared. QuillBot saves $2/mo.

Grammarly: 3 wins

QuillBot: 2 wins

Our Verdict

Grammarly is more comprehensive (tone detection, clarity rewrites, plagiarism checker) at $12/mo. QuillBot is cheaper ($10/mo), has a free tier, and excels at paraphrasing. Students should pick QuillBot. Professionals should pick Grammarly.

Dimension

Grammarly

QuillBot

Monthly price

$12/mo Premium

$10/mo Premium

Free tier

Yes — basic grammar

Yes — 125 words paraphrase

Grammar checking

Excellent — industry standard

Good

Paraphrasing

Basic rewrites

Core feature — 9 modes

Tone detection

Yes

Plagiarism checker

Yes (Premium)

Browser extension

Yes — excellent

Yes — good

Best for

Professionals, business writing

Students, academic paraphrasing

Full Grammarly review →

Full QuillBot review →

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aitoolsmentor.com · Benchmarks verified March 27, 2026 · AI Tools Mentor Fit Score