Grammarly vs QuillBot 2026 — Honest Comparison
These are the two most widely used AI writing assistants for everyday writers, students, and professionals. Grammarly covers grammar, tone, clarity, and style across everything you write. QuillBot specialises in paraphrasing, rewriting, and summarising text. They overlap on grammar checking — but their core strengths are different enough that many people use both.
The AI Map Verdict — June 2026
Grammarly wins as your always-on writing coach — grammar, tone, clarity, and style across all writing surfaces.
QuillBot wins for paraphrasing, rewriting, summarising, and AI content humanisation.
Both have genuinely useful free tiers. Grammarly Pro at $12/month is the cleaner upgrade for most writers. QuillBot Premium is the better choice if you frequently need to rephrase content, avoid plagiarism, or humanise AI-generated text. The tools solve different problems — which is why many users keep both free tiers running simultaneously.
Quick Answer — Last verified: June 2026
Choose Grammarly if you want an always-on writing coach that fixes grammar, tone, and clarity across every app you use ($12/mo Pro, annual). Choose QuillBot if you need to paraphrase, rewrite, or humanise AI-generated text ($9.99/mo Premium). Both have free tiers — many writers use both simultaneously.
Decision Rules
- Use Grammarly if you:
- Want inline corrections everywhere — Gmail, Google Docs, Word, Slack, browser. Grammarly's browser extension covers all surfaces. QuillBot is a standalone web app.
- Use Grammarly if you:
- Need tone detection and clarity scoring — Grammarly flags passive voice, wordiness, and tone mismatches. QuillBot does not.
- Use QuillBot if you:
- Paraphrase or rewrite frequently — QuillBot has 8 paraphrase modes (Standard, Fluency, Formal, Academic, etc.). Grammarly has one basic rewrite suggestion.
- Use QuillBot if you:
- Need to humanise AI-generated text — QuillBot's humaniser reduces AI detection scores. Grammarly has no equivalent feature.
- Use QuillBot if you:
- Are a student on a budget — QuillBot Premium is $9.99/mo vs Grammarly Pro at $12/mo. QuillBot also includes summariser and citation generator in Premium.
- Use both if:
- You write and rewrite regularly — Grammarly free catches errors while you type, QuillBot free lets you rephrase up to 125 words at a time. Total cost: $0.
Fact Ledger — verified June 2026, no unsourced stats
| Fact |
Value |
Source |
| Grammarly Pro price |
$12/member/mo (annual) |
grammarly.com/plans |
| QuillBot Premium price |
$9.99/mo (annual) |
quillbot.com/premium |
| Grammarly free tier |
Grammar + spelling checks, limited suggestions |
grammarly.com/plans |
| QuillBot free word limit |
125 words per paraphrase |
quillbot.com/premium |
| Grammarly browser extension |
Works in Gmail, Docs, Word, Slack, browser |
grammarly.com/browser |
| QuillBot paraphrase modes |
8 modes: Standard, Fluency, Formal, Academic, Simple, Creative, Expand, Shorten |
quillbot.com |
| Grammarly Business price |
$15/member/mo (annual, 3+ seats) |
grammarly.com/plans |
Tool Overlap Warning:
Grammarly and QuillBot overlap only on basic rewriting — Grammarly's "Improve It" vs QuillBot's paraphraser. Everything else is different: Grammarly is a live writing assistant, QuillBot is a post-writing rewrite tool. Paying for both Pro tiers ($22/mo) is justified only if you write and rewrite at high volume. Most users get full value from Grammarly free (live corrections) + QuillBot free (125-word paraphrasing) at $0/mo.
$12
Grammarly Pro per member/month (annual) — was Premium
125
QuillBot free word limit per paraphrase — unlimited on Premium
Free
Both have useful free tiers — no credit card needed
Grammarly pricing: grammarly.com/premium, verified June 2026. QuillBot free limits: quillbot.com/paraphrasing-tool, verified June 2026.
Current Plans (May 2026)
Grammarly Best all-round writing assistant
Grammarly Inc. · AI writing assistant and grammar checker
Free tierGrammar checks, tone visibility, 100 AI prompts/month
Pro (annual)$12/member/month
Pro (monthly)$30/month
Pro includesFull rewrites, tone adjustment, 2,000 AI prompts/month
Team featuresStyle guides, brand tones, snippets, analytics
EnterpriseCustom — SSO, BYOK encryption, data loss prevention
NotePremium rebranded to Pro in 2025 — same price
QuillBot
QuillBot AI · Paraphrasing, rewriting, and summarising tool
Free tier125 words/paraphrase, 2 modes, unlimited uses
Free grammarBasic grammar fixes — no sign-up required
Premium (annual)~$4.17/month billed annually (~$49.95/year)
Premium (monthly)~$9.99/month billed monthly
Premium includesUnlimited paraphrasing, 10+ modes, advanced grammar
Plagiarism checker25,000 words/month on Premium
AI toolsAI Detector, AI Humanizer, AI Chat, Image Generator
Team planCustom pricing — centralised billing, user management
Grammarly pricing: grammarly.com/premium, verified June 2026. QuillBot Premium pricing: ~$4.17/month annual (~$49.95/year) or ~$9.99/month — verify current rates at quillbot.com before purchasing as pricing varies by region and promotion.
Feature Comparison
| Category | Grammarly | QuillBot | Winner |
|---|
| Grammar checking | Best-in-class — catches grammar, spelling, punctuation, style errors in real time | Solid basic grammar checker — available free, no sign-up needed | Grammarly |
| Paraphrasing | Rewrites available via AI prompts — not specialised | Core product — 10+ modes, 125-word free limit, unlimited on Premium | QuillBot |
| Tone detection & adjustment | Yes — detects tone and suggests adjustments across any text | Paraphrase modes affect tone — not a dedicated tone tool | Grammarly |
| Summarisation | AI prompt-based — not a dedicated summariser | Dedicated Summarizer tool — handles long documents | QuillBot |
| AI content detection | Available on Premium/Pro — detects AI-generated text | AI Detector included — unlimited on Premium | Tie |
| AI humanisation (bypassing detectors) | Not a feature | Dedicated AI Humanizer — rewrites AI text to read as human-written | QuillBot |
| Plagiarism checker | Available on Pro — checks against web sources | 25,000 words/month on Premium | Tie |
| Browser integration | Chrome, Firefox, Safari, Edge — works across all writing surfaces | Chrome, Edge, Safari extensions — Microsoft Word add-in | Grammarly (broader) |
| Microsoft Word integration | Native Word add-in — full feature set in Word | Microsoft Word add-in available | Tie |
| Google Docs integration | Yes — works natively in Google Docs | Chrome extension covers Google Docs | Grammarly (native) |
| Team / brand features | Pro includes style guides, brand tones, snippets, team analytics | Team plan available — usage metrics, centralised billing | Grammarly |
| Free tier quality | Genuinely useful — catches real errors, tone visibility, 100 AI prompts | Very useful — 125-word paraphraser unlimited, free grammar tool, no sign-up | Tie — both excellent free tiers |
Use Case Verdicts
Everyday writing — emails, reports, documents
→ Grammarly wins
Grammarly is built for always-on writing assistance across every surface you write on. It catches errors as you type in Gmail, Google Docs, Slack, LinkedIn, Notion, and your browser. QuillBot works on text you paste in — it is a deliberate rewriting tool, not an always-on assistant. For everyday writing, Grammarly's integration depth makes it the clear choice.
Students rewriting essays or paraphrasing research
→ QuillBot wins
QuillBot's paraphrasing tool with multiple modes (Academic, Formal, Creative, Simple, etc.) is purpose-built for this. Students can paste in source material and get a properly reworded version to incorporate into their work. The free tier (125 words at a time, unlimited uses) covers most student needs without paying. Grammarly can rewrite but it is not designed as a paraphrasing tool.
Humanising AI-generated content
→ QuillBot wins
QuillBot has a dedicated AI Humanizer tool designed to rewrite AI-generated text so it reads as human-written and is less likely to be flagged by AI detectors. Grammarly does not offer this feature. If you are working with AI-generated content that needs to pass AI detection tools, QuillBot is the only choice of the two.
Professional teams maintaining brand voice
→ Grammarly wins
Grammarly Pro includes team-wide style guides, brand tone settings, shared snippets, and writing analytics — designed for teams that need consistency across multiple writers. QuillBot's Team plan has centralised billing and user management but no equivalent brand governance features. For content teams and marketing departments, Grammarly Pro's team features are substantially more useful.
Summarising long documents or articles
→ QuillBot wins
QuillBot has a dedicated Summarizer tool that handles long-form documents and produces condensed versions at different lengths. Grammarly can summarise via AI prompts but it is not a purpose-built tool. For researchers, students, and professionals who need to process large amounts of text quickly, QuillBot's Summarizer is the better purpose-built solution.
The setup most writers use: Grammarly free tier always on in the browser — catches grammar and tone issues everywhere. QuillBot free tier open in a tab — paste in text when you need to rephrase, rewrite, or summarise. Total cost: $0. Upgrade Grammarly to Pro ($12/month) when you want full rewrites and team features. Upgrade QuillBot to Premium when you need the plagiarism checker or AI humaniser regularly.
Frequently Asked Questions
Is Grammarly Premium now called Grammarly Pro?
Yes. Grammarly rebranded its individual paid tier from Premium to Pro in 2025. Existing Premium subscribers were migrated to Pro plans with the same billing amount. Pro adds team collaboration features including style guides, brand tone settings, knowledge sharing, and writing analytics — features that did not exist in the original Premium. The price for annual billing remains $12/member/month. Source: grammarly.com/premium, verified May 29, 2026.
Does QuillBot have a free plan with no word limit?
QuillBot's grammar checker is fully free with no word limit and no sign-up required. The paraphrasing tool is free but limited to 125 words per input, with unlimited uses — you can paraphrase as many times as you like but must break longer text into 125-word chunks. Premium removes this limit and gives unlimited paraphrasing, 10+ modes, and access to all other tools. Source: quillbot.com/paraphrasing-tool, verified May 29, 2026.
Can I use both Grammarly and QuillBot at the same time?
Yes — and many writers do. Both tools work independently and do not conflict. A common workflow: write and edit with Grammarly active in the browser, then paste specific passages into QuillBot when you want to rephrase or rewrite them. Both free tiers together cost $0 and cover most everyday writing and rewriting needs.
Is Grammarly safe — does it store your text?
Grammarly processes your text on its servers to provide suggestions. It has a privacy policy covering how text is stored and used — they state text is used to provide the service and improve it. Grammarly Enterprise offers BYOK (bring your own key) encryption for organisations with strict data requirements. If you handle sensitive documents, review grammarly.com/privacy before use. QuillBot similarly processes text on its servers — review quillbot.com's privacy policy for your use case.
Which is better for non-native English speakers?
Both tools help non-native English speakers significantly. Grammarly's clarity and fluency suggestions help with sentence structure, word choice, and natural phrasing — and it catches errors in real time as you type. QuillBot's Fluency mode rewrites text to be more natural and readable in English. For someone writing in English as a second language, the combination of both free tiers is powerful: Grammarly for real-time correction, QuillBot for fluent rewrites of awkward passages.
Best choice for professional writers
Try Grammarly Pro — $12/month
Always-on grammar, tone, clarity and full AI rewrites across every app you write in. Free tier available — no credit card needed.
Start free with Grammarly ↑
Affiliate disclosure: Grammarly links on this page are affiliate links — we may earn a commission if you sign up, at no extra cost to you. QuillBot links are not affiliate links. Our editorial verdict is independent of affiliate relationships.