Grammarly vs QuillBot
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers.
AI tool · Freemium
A paraphrasing, grammar, summarising and citation tool popular with students.
Our verdict
Grammarly is a proofreading and tone assistant that works across most apps you type in, so it suits everyday emails and documents. QuillBot centres on rewording, summarising sources and generating citations, which makes it more of a study and paraphrasing tool. Both are freemium and both check grammar, so the choice depends on whether you mainly need polish across apps or help rewriting and handling sources.
Pick Grammarly if you want grammar and tone checks on emails and documents wherever you type, across apps and browsers.
Pick QuillBot if you need to reword sentences, summarise sources or generate citations, especially for school or research work.
| Key difference | Grammarly | QuillBot |
|---|---|---|
| Core purpose | Proofreading and tone checks for everyday writing | Paraphrasing, summarising and citation tool |
| Best at | Grammar, clarity and tone suggestions in many apps | Rewording sentences and summarising sources |
| Extra AI features | Generative rewrites across apps via extension | Paraphraser modes, summariser and citation generator |
| Platforms | Web, Chrome, macOS, Windows, iOS, Android | Web, Chrome, macOS, Windows (no mobile listed) |
| Watch out for | Suggestions can flatten a distinctive voice | Over-paraphrasing can raise academic-integrity concerns |
Written with AI from both products' catalogue entries · updated 2026-10-29
Who each one is for
Choose Grammarly if you need…
- Proofreading everyday writing
- Tone checks on emails
Choose QuillBot if you need…
- Rewording sentences
- Students summarising sources
Side-by-side
| Grammarly | QuillBot | |
|---|---|---|
| Type | Writing · Editing & grammar | Writing · Editing & grammar |
| Price | Freemium | Freemium |
| Platforms | Web, Chrome, macOS, Windows, iOS, Android | Web, Chrome, macOS, Windows |
| Works with | Chrome, Google Workspace, Microsoft 365 | Chrome, Microsoft 365, Google Workspace |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Grammarly
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. Catches errors wherever you type. Suggestions can flatten a distinctive voice; accept them selectively.
QuillBot
A paraphrasing, grammar, summarising and citation tool popular with students. Handy for rephrasing. Over-paraphrasing can raise academic-integrity concerns; follow your institution's rules.
Best for
Grammarly
- Proofreading everyday writing
- Tone checks on emails
QuillBot
- Rewording sentences
- Students summarising sources
Strengths
Grammarly
- Grammar and clarity suggestions
- Tone detection
- Generative rewrites
- Works across apps via extension
QuillBot
- Paraphraser with modes
- Grammar checker
- Summariser
- Citation generator
Frequently asked questions
Should I use Grammarly or QuillBot?
Grammarly is a proofreading and tone assistant that works across most apps you type in, so it suits everyday emails and documents. QuillBot centres on rewording, summarising sources and generating citations, which makes it more of a study and paraphrasing tool. Both are freemium and both check grammar, so the choice depends on whether you mainly need polish across apps or help rewriting and handling sources. Pick Grammarly if you want grammar and tone checks on emails and documents wherever you type, across apps and browsers. Pick QuillBot if you need to reword sentences, summarise sources or generate citations, especially for school or research work.
What is the difference between Grammarly and QuillBot?
Grammarly: A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. QuillBot: A paraphrasing, grammar, summarising and citation tool popular with students. Grammarly suits proofreading everyday writing, while QuillBot suits rewording sentences.
Are Grammarly and QuillBot free?
Grammarly: Freemium. QuillBot: Freemium.
What are other alternatives to Grammarly and QuillBot?
Other options people compare them with include LanguageTool, ProWritingAid, Wordtune, Hemingway Editor, DeepL.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.