Grammarly vs QuillBot
Grammarly scores 8.3 to QuillBot's 7.3 among the AI writing assistants we rate, and is the better pick for 3 of the 4 kinds of buyer below.
Grammarly wins, 8.3 to 7.3
QuillBot's Premium plan costs $19.95 a month against Grammarly's Pro at $30 a month. Grammarly holds SOC 2 Type II and ISO 27001 certification; QuillBot's trust center lists neither. Grammarly also works inside Word, Google Docs, Outlook, Gmail and Slack, where QuillBot's add-in list is Word alone. Both check grammar and plagiarism, generate new text from a prompt, detect AI writing and rewrite AI text to read as human.
Pick Grammarly if you want SOC 2, ISO 27001 and wider app coverage.
Pick QuillBot if you want a cheaper plan and don't need extra add-ins.
Best for
Who each one suits, decided on the criteria that matter to that buyer and the checked facts where the two differ.
- Word, Google Docs, Outlook, Gmail and Slack add-ins: Word, google_docs, outlook, gmail, slack against Word
- Browsers it has an extension for: Chrome, edge, firefox, safari against Chrome, edge, safari
- Monthly price, cheapest paid plan: $19.95 against $30
- Your own style guide and terms: Grammarly yes, QuillBot does not say
- API: Grammarly yes, QuillBot does not say
- Single sign-on: Grammarly yes, QuillBot does not say
- SOC 2: Grammarly yes, QuillBot no
- ISO 27001: Grammarly yes, QuillBot no
How they score
Both are scored the same way, against the other AI writing assistants we rate, from facts on each vendor's own pages. Grammarly leads on 3 of 5 criteria.
Where they differ
Every point where the two vendors' published facts disagree, with a link to where each fact was read. "Not published" means the vendor does not say either way.
Published by only one of them
Where they match (10)
Pricing, plan by plan
Every plan each vendor publishes, monthly and yearly where both are offered.
Grammarly
QuillBot
For everything else about each tool, read the full Grammarly review and QuillBot review.
Grammarly vs QuillBot: common questions
Which is better, Grammarly or QuillBot?
Grammarly scores 8.3 and QuillBot 7.3 out of 10 among the AI writing assistants we rate. Grammarly is ahead on where it works, teams and control and privacy and security. QuillBot is ahead on pricing.
Is Grammarly or QuillBot cheaper?
Grammarly's cheapest paid plan is $12/mo (Pro plan, billed annually) and QuillBot's is $19.95/mo (Premium, monthly billing; $8.33/mo billed annually). Compare what each plan includes below before going on price alone.
What can Grammarly do that QuillBot cannot?
On the facts both vendors publish: sOC 2 and iSO 27001.
