Grammarly vs QuillBot: Which Writing Tool Is Better In 2026?

Meta description: Grammarly vs QuillBot in 2026: we compare pricing, free plans, grammar checks, paraphrasing, AI features, plagiarism tools, integrations and data privacy.

Grammarly is the better choice if you want a polished, real-time editor that follows you across email, docs and browser apps, with strong team and admin controls. QuillBot is the better choice if your main need is rewording and summarizing text on a budget, since its paid plan costs less and its paraphrasing tool offers more modes. Both have free plans that cover basic grammar fixes, so many writers can test each before paying.

This Grammarly vs QuillBot comparison covers pricing (as of October 2026), free tier limits, grammar checking, paraphrasing, AI writing features, plagiarism and AI detection, integrations, and how each company handles your data. All plan details were checked against each vendor’s own website.

Grammarly vs QuillBot At A Glance

Feature	Grammarly	QuillBot
Company	Grammarly product, from the company now named Superhuman	QuillBot, a Learneo, Inc. business
Best for	Real-time editing and professional, team writing	Paraphrasing, summarizing and budget-friendly rewriting
Free plan	Yes: writing mistake checks, tone view, 100 AI prompts per month	Yes: basic grammar, paraphraser up to 125 words in 2 modes, summarizer up to 1,200 words
Paid individual plan	Pro: $12 per month billed annually ($144 per year), $30 billed monthly	Premium: $8.33 per month billed annually; monthly and quarterly billing also offered
Team plan	Pro (multi-seat) and Enterprise (contact sales)	Team Plan (contact sales for pricing)
Free trial or guarantee	7-day free trial of Pro	3-day money-back guarantee
Paraphrasing	Paraphraser agent with six preset styles, six languages	Standard and Fluency free; more modes and custom modes on Premium; 20+ languages
AI writing	Up to 2,000 AI prompts per member per month on Pro; agents in Grammarly Docs; Superhuman Go assistant	AI Chat, Writing Studio, Design Studio
Plagiarism checker	Pro and Enterprise	Premium only, 25,000 words per month
AI detector	Free standalone tool; in-app on Pro and Enterprise	Free up to 1,200 words per scan; unlimited on Premium
Integrations	Chrome, Safari, Firefox, Edge, Windows, Mac, Microsoft Office, Google Docs, iOS, Android	Chrome, Edge, Safari, Word add-in, Google Docs (via Chrome), macOS, Windows, iOS and Android keyboard

What Is The Difference Between Grammarly And QuillBot?

Grammarly started as a grammar checker and has grown into an AI writing assistant that runs inside the apps you already use. It says it is trusted by 40 million people and 50,000 organizations. In late 2025 the company behind it renamed itself Superhuman, and Grammarly now sits alongside Coda, Superhuman Mail and the Superhuman Go assistant in one product suite. The Grammarly product keeps its name.

QuillBot built its reputation on paraphrasing, then added a grammar checker, summarizer, translator, AI detector, plagiarism checker and AI chat. It reports more than 35 million writers in 180+ countries. QuillBot is a Learneo, Inc. business, part of the same group as Course Hero, CliffsNotes, LanguageTool, LitCharts, Scribbr and Symbolab.

The practical difference is focus. Grammarly is built around correcting and improving the text you are writing right now, in place. QuillBot is built around transforming text you already have: rewording it, shortening it, summarizing it or translating it.

Pricing In 2026

Grammarly Pricing

Grammarly has three plans: Free, Pro and Enterprise. The Free plan costs nothing and includes writing mistake checks, a tone view and 100 AI prompts per month. It does not include plagiarism or AI detection inside the product, tone adjustment or full-sentence rewrites.

Grammarly Pro pricing depends on the billing cycle: Pro costs $30 per member billed monthly, $60 per member billed quarterly, or $144 per member billed annually, which works out to $12 per month. Pro raises the AI allowance to 2,000 prompts per member per month and adds the plagiarism checker and AI detection. A 7-day free trial is available, and Pro supports up to 149 seats. Enterprise is priced through sales and includes unlimited prompts per member.

If you are moving off Grammarly or switching billing cycles, our guide on how to cancel Grammarly walks through the steps.

QuillBot Pricing

QuillBot has three tiers: Free, Premium and Team Plan. The Free plan requires no credit card and includes basic grammar fixes, the paraphraser for up to 125 words in 2 modes, the summarizer for up to 1,200 words, and limited AI detector access.

QuillBot Premium is listed at $8.33 per month billed annually. QuillBot also offers monthly and quarterly billing, and its help center notes that prices can change based on your location and currency at checkout, so check the upgrade page for your region. Premium comes with a 3-day money-back guarantee and can be used on up to 10 devices at a time.

The Team Plan includes everything in Premium plus usage metrics, a user management dashboard, centralized billing and data controls. Organizations with five or more members are directed to QuillBot’s business development team for discounted pricing.

Which Is Cheaper?

On annual billing, QuillBot Premium costs noticeably less than Grammarly Pro. For a single user who mainly paraphrases and summarizes, QuillBot gives more for the money. Grammarly Pro costs more but bundles a larger AI prompt allowance and deeper in-app editing.

Grammar Checking

Grammarly is the stronger grammar checker for everyday professional writing. Its suggestions appear as you type across browsers, desktop apps and Office, and the free plan already catches spelling, grammar and punctuation mistakes. Pro unlocks tone adjustments and full-sentence rewrites, which help when the problem is clarity rather than a single error.

QuillBot’s grammar checker is free with no sign-up and allows unlimited checks. It fixes grammar, spelling and punctuation and gives feedback on clarity, fluency and tone. It covers English variants (US, UK, Australian and Canadian) plus German, French, Spanish, Brazilian Portuguese, Swiss German and Dutch. Premium adds advanced recommendations and tone insights.

For quick error checks, both are capable. For writers who want a constant editor sitting inside every app, Grammarly’s real-time experience is more mature.

Paraphrasing

This is where QuillBot leads. Its paraphrasing tool includes Standard and Fluency modes on the free plan, with a 125-word limit per paraphrase. Premium removes the word limit and unlocks the rest of the built-in modes, including Formal, Simple, Creative, Academic, Expand and Shorten, plus unlimited custom modes. A Synonym Slider controls how much of the original wording changes, and paraphrasing works in 20+ languages.

Grammarly also offers a free Paraphraser, now delivered as an agent. It lets you choose from six preset styles and add your own tone and style direction, which it remembers for future rewrites. It supports English, Spanish, French, German, Portuguese and Italian, and multilingual paraphrasing requires a free account.

If paraphrasing is the main job, QuillBot’s mode depth and slider give finer control. If you only reword the occasional sentence, Grammarly’s built-in option is usually enough.

AI Writing Features

Grammarly has pushed hard into AI agents. In Grammarly Docs (opened from app.grammarly.com) a side panel offers agents including Proofreader, Paraphraser, Reader Reactions, Citation Finder, AI Grader, AI Detector and Plagiarism Checker. Grammarly says most agents can be tried on the free plan, with some agents and features limited to paid customers. AI prompts are capped at 100 per month on Free and 2,000 per member per month on Pro.

Beyond Grammarly itself, Superhuman Go is an AI assistant that brings proactive suggestions into other apps and connects to tools such as Google Workspace, Outlook, Jira and Confluence. This matters most for teams already living in those systems.

QuillBot’s AI features center on AI Chat for brainstorming and research, plus Writing Studio for polished documents and Design Studio, which combines writing and visual generation. Output from chat can be moved into these workspaces. QuillBot also includes a summarizer (6,000 words on Premium), a translator covering 40+ languages and a citation generator.

Grammarly suits writers who want AI help embedded in their existing workflow. QuillBot suits writers who prefer a standalone workspace with several single-purpose tools.

Plagiarism Checking

Grammarly’s plans page lists the plagiarism checker as a Pro and Enterprise feature. It compares text against more than 16 billion web pages and academic papers in ProQuest’s databases and highlights passages that may need citations.

QuillBot’s plagiarism checker is Premium only and includes 25,000 words per month, with extra word packs available to buy. It checks text in over 100 languages against billions of internet sources. QuillBot states plainly that its plagiarism checker cannot detect paraphrased content, which is worth knowing if you are reviewing other people’s work.

For academic and research-heavy use, Grammarly’s ProQuest coverage is a meaningful advantage. For occasional checks across many languages, QuillBot’s allowance is adequate. For a broader view, see our roundup of content writing resources.

AI Detector

Both companies offer AI detectors, and both are careful to say no detector is fully accurate. Treat any score as one signal in a wider review, not as proof.

Grammarly offers a free standalone AI detector on its website with no sign-up, and in-app AI detection is part of Pro and Enterprise. Grammarly advises never relying on detector results alone, since detectors estimate likelihood and can flag human-written text.

QuillBot’s AI detector is free for up to 1,200 words per scan and up to six scans per day, with unlimited scanning on Premium. It gives a 0 to 100% likelihood score, highlights specific sentences, and tries to distinguish fully AI-written, fully human-written and human-written text with AI refinement. It requires at least 80 words, and QuillBot notes that formulaic human writing such as legal or academic definitions can score higher than expected.

Integrations

Grammarly works on any app or website through browser extensions for Chrome, Safari, Firefox and Edge, plus desktop apps for Windows and Mac. It also integrates with Microsoft Office and Google Docs, and has apps for iPhone, iPad and Android.

QuillBot offers browser extensions for Chrome, Edge and Safari. Its Chrome extension works in Google Docs once you are signed in. Quillbot for Word is a free add-in that brings the Paraphraser and Grammar Checker into Word on Windows, Mac and Word for the web. QuillBot also has macOS and Windows apps that appear as a widget in tools like Slack and Notes, and a free AI writing keyboard for iOS and Android.

Grammarly has the edge on breadth and polish, especially Firefox support and its long-standing desktop integration. QuillBot now covers most of the same ground, which narrows the gap considerably.

Privacy And Data

Grammarly states that it never sells user content and does not allow third parties to train their models on it. It does use writing to improve its products. A Product Improvement and Training control lets you decide whether your content can be used to train models. This control is on by default for individual accounts (Free, Premium and single-user Pro), and you can switch it off in your account settings. It is off by default for Business, Education, Enterprise and Pro accounts bought through sales, and admins of multi-user Pro accounts can turn it off for the whole organization.

QuillBot states that it does not and will not sell your data, and that its standard policy is not to let third-party providers train AI models on your data. QuillBot does use inputs and usage data to train and improve its own services, but says it does not train on any text inputs from Team Plan users. Extension users on version 4.37.0 or later get two data controls: one to stop storing text inputs and one (for account holders) to opt out of AI training. QuillBot also cites GDPR work, CASA Tier 2 verification and PCI DSS compliance.

For sensitive business content, both tools give organizations a path to keep text out of training. Grammarly’s sales-led business plans default to off, while QuillBot’s Team Plan excludes text inputs from training.

Which Should You Choose?

Choose Grammarly If…

You write a lot of emails, documents and messages and want a real-time editor that works everywhere you type. Grammarly is also the better fit for teams that need admin controls, data settings that default to off on business plans, and AI agents connected to tools like Google Workspace and Jira. Students and researchers who need plagiarism checks against academic databases will also benefit from Pro.

Choose QuillBot If…

Your main task is rewording, summarizing or translating existing text, and you want the most paraphrasing modes for the lowest price. QuillBot Premium costs less than Grammarly Pro on annual billing, its free grammar checker has no usage cap, and its Word add-in, desktop widget and mobile keyboard cover most daily writing. It is a good value pick for freelancers and multilingual writers.

Some writers use both: Grammarly for live editing and QuillBot for heavier rewriting and summarizing.

Frequently Asked Questions

Is Grammarly Or QuillBot Better For Grammar Checking?

Grammarly is better for continuous, real-time grammar checking inside your apps. QuillBot’s grammar checker is free and unlimited and covers several languages, which makes it a solid option for quick checks.

Is QuillBot Cheaper Than Grammarly?

Yes. As of October 2026, QuillBot Premium is listed at $8.33 per month billed annually, while Grammarly Pro is $12 per month billed annually or $30 billed monthly.

Do Grammarly And QuillBot Have Free Plans?

Both do. Grammarly Free includes writing mistake checks, a tone view and 100 AI prompts per month. QuillBot Free includes basic grammar fixes, a 125-word paraphraser with two modes, a 1,200-word summarizer and limited AI detector access.

Do Grammarly And QuillBot Train AI On My Writing?

Both use some user content to improve their own products, and both say they do not sell your content or let third parties train on it. Grammarly lets individuals turn off product improvement and training in account settings. QuillBot offers training opt-outs in recent extension versions and does not train on Team Plan text inputs.

Who Owns QuillBot?

QuillBot is a Learneo, Inc. business. Learneo also operates Course Hero, CliffsNotes, LanguageTool, LitCharts, Scribbr and Symbolab.

Conclusion

Grammarly vs QuillBot comes down to how you write. Grammarly is the stronger all-round editor, with real-time suggestions across nearly every app, a larger AI prompt allowance, academic plagiarism coverage and business-grade data controls. It costs more, but teams and heavy writers get a lot in return.

QuillBot is the better value for paraphrasing, summarizing and multilingual rewriting, with a cheaper paid plan and a generous free grammar checker. Try both free plans with your own writing for a week, then pay for the one that fits the work you actually do most.