Grammarly vs QuillBot: Which AI Writing Tool Should You Use?

Which should you pick?

• Lowest paid priceQuillBot

  QuillBot Premium is $8.33 a month billed annually QuillBot Premium ↗. Grammarly Pro is $12 per member a month billed annually or $30 monthly Grammarly Pro ↗.

• Best for paraphrasing and summarizingQuillBot

  QuillBot Premium includes 9 paraphrasing modes plus unlimited custom modes and summaries up to 6,000 words QuillBot Premium ↗.

• Best for writing in many appsGrammarly

  Grammarly says it works across 1 million+ apps and sites, including Google Docs, Word, Gmail, Outlook and Slack Grammarly Pro ↗. QuillBot lists browser extensions, a Word add in and desktop and mobile apps QuillBot features ↗.

• Best for teams and brand voiceGrammarly

  Grammarly Pro includes a style guide, brand tone, user groups, snippets and team analytics for 1 to 149 seats Grammarly plans ↗ Grammarly Pro ↗.

• Best free planTie

  Grammarly Free fixes mistakes, shows tone and includes 100 AI prompts a month Grammarly plans ↗. QuillBot Free paraphrases up to 100 words in 2 modes and summarizes up to 1,200 words QuillBot Premium ↗.

• Best for translationQuillBot

  QuillBot Premium translates text in 40+ languages QuillBot Premium ↗. Grammarly offers writing help in more than 20 languages Grammarly Pro ↗.

Side by side

From each vendor’s own pages, checked Oct 9, 2026. Prices change often.

Pricing and free plans

Grammarly has three plans. Free corrects mistakes, shows your writing tone and includes 100 AI prompts a month, but leaves out sentence rewrites, tone adjustment, plagiarism checks and AI text detection Grammarly plans ↗. Pro is $12 per member a month billed annually or $30 billed monthly, with 2,000 AI prompts per member a month Grammarly Pro ↗. Its plans page lists a 7 day free trial for Pro Grammarly plans ↗. Enterprise is priced by quote Grammarly plans ↗.

QuillBot Premium is $8.33 a month billed annually, which the page labels 58% off QuillBot Premium ↗. The page did not show monthly or semi annual prices when we checked, so check those at checkout QuillBot Premium ↗. The free plan paraphrases up to 100 words in two modes, summarizes up to 1,200 words, fixes basic grammar and gives limited access to the AI detector and humanizer QuillBot Premium ↗. A Team Plan adds usage metrics, user management, central billing and priority support, with a discount on a single invoice for five or more people QuillBot Premium ↗.

For one person paying yearly, QuillBot costs about $44 less a year than Grammarly Pro QuillBot Premium ↗ Grammarly Pro ↗. For monthly billing, Grammarly Pro's $30 rate is steep, so pay yearly if you commit.

Writing help compared

Grammarly checks as you type. Pro rewrites full sentences with one click, adjusts tone, gives unlimited personalized suggestions, and checks inclusive language and citation consistency Grammarly plans ↗. It also offers AI agents including Citation Finder, AI Grader, Reader Reactions, Resume Builder, a Humanizer and an AI Detector Grammarly Pro ↗ Grammarly features ↗. Grammarly works in more than 20 languages Grammarly Pro ↗.

QuillBot is a set of separate tools: a paraphraser, grammar checker, AI detector, humanizer, translator, citation generator, summarizer and AI chat QuillBot features ↗. Premium unlocks all paraphrasing modes, 6,000 word summaries with custom summaries, a 25,000 word monthly plagiarism allowance, translation in 40+ languages and grammar correction in six languages QuillBot Premium ↗.

The difference in practice: Grammarly polishes what you write in place, while QuillBot is better at reworking text you paste in. If you rewrite other people's content, check that you have the right to reuse it, and cite sources.

Usage limits matter for heavy users. Grammarly Free caps generative AI at 100 prompts a month and Pro at 2,000 per member, while Enterprise is unlimited Grammarly plans ↗. Agent access on Pro is listed as unlimited and separate from the prompt cap Grammarly Pro ↗. QuillBot's limits sit on each tool instead: the plagiarism checker covers 25,000 words a month on Premium, summaries top out at 6,000 words, and AI Chat and image generation have higher, but still limited, usage on Premium QuillBot Premium ↗.

Apps, teams and privacy

Grammarly says it works on 1 million+ apps and sites and names Google Docs, Microsoft Word, Gmail, Outlook, Slack, Salesforce, PowerPoint, LinkedIn, Teams, Google Sheets, Zendesk and Jira, with extensions for Chrome, Safari, Firefox and Edge Grammarly Pro ↗. QuillBot lists Chrome, Edge and Safari extensions, a Word add in, and apps for macOS, Windows, iOS and Android QuillBot features ↗.

For teams, Grammarly Pro includes one style guide, one brand tone, two user groups, snippets, Knowledge Share and team analytics Grammarly plans ↗. Enterprise adds unlimited style guides and brand tones, SAML single sign on, SCIM, data loss prevention and BYOK encryption Grammarly plans ↗.

On privacy, Grammarly says it does not sell or monetize user content and does not let third party providers train models on it Grammarly features ↗. Grammarly is now part of Superhuman Grammarly features ↗. QuillBot's Team Plan lists data control, but the pages we checked give no further detail QuillBot Premium ↗.

Who should pick which

Grammarly suits business owners and teams who write client emails, proposals and posts in many apps and want consistent tone and brand voice Grammarly plans ↗ Grammarly Pro ↗. It is the bigger, more reviewed product: G2 shows 4.7 out of 5 from more than 14,000 reviews G2 ↗, and Grammarly says 40 million people and 50,000 organizations use it Grammarly Pro ↗.

QuillBot suits students, researchers and writers who mainly paraphrase, summarize, translate or check plagiarism, and want to spend less QuillBot Premium ↗. G2 shows 4.4 out of 5 from about 80 reviews G2 ↗, and QuillBot says it has 35 million writers worldwide QuillBot features ↗.

Some people use both: QuillBot to reshape a rough draft or summarize research, then Grammarly to polish the final text in the app where it will be sent. If you only want one, choose based on whether you mostly write new text (Grammarly) or rework existing text (QuillBot).

• Polished emails and documents in any app: Grammarly
• Team style guide and brand tone: Grammarly Pro
• Rewording and summarizing text: QuillBot Premium
• Translating into many languages: QuillBot Premium
• Lowest yearly cost: QuillBot Premium

A note on AI detectors and humanizers

Both tools now sell an AI detector and a humanizer Grammarly features ↗ QuillBot Premium ↗. Treat detector scores as a rough signal, not proof. No detector can say for sure who wrote a piece of text, and false positives can hurt honest writers. If you use a humanizer, remember that your school, client or employer may have rules about AI written work.

How we compared them

We used Grammarly's and QuillBot's plan, pricing and product pages, checked October 9, 2026, plus G2 user ratings Grammarly plans ↗ Grammarly Pro ↗ Grammarly features ↗ QuillBot Premium ↗ QuillBot features ↗ G2 ↗. We have not tested these tools hands on for this comparison yet. Hands on testing is in progress; we'll update this page with results.

Try them

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