Grammarly vs QuillBot
- ✦ Grammar checking
- ✦ Plagiarism detection
- ✦ Tone suggestions
- ✦ Paraphrasing tool
- ✦ Grammar checker
- ✦ Plagiarism checker
Grammarly and QuillBot are both AI Writing Tools tools. Grammarly starts at $30/mo, QuillBot at $19.95/mo. Compare features, pricing, and ratings below to find the best fit for your team.
When to Choose Grammarly vs QuillBot
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
Plagiarism detection scans 16+ billion sources in under 3 seconds per document, catching unattributed language before it reaches external stakeholders.
Rewrite drafts in fluency mode, then immediately scan results for similarity matches. Content moves from generation to clearance in 2 hours instead of 1-2 days.
Style improvements catch passive voice and unclear modifiers in spec documents, cutting engineering scope clarification requests by 35% and compressing feedback loops.
Translator converts docs into 20+ languages; Grammar checker flags mistranslations that break instructions. Localization cost drops 60% over per-language copy editors.
The Team style guide pushes real-time corrections into Google Docs, team chat, and email clients - cutting first-pass copy editing for 60-70% of contributor submissions.
Citation generator formats references and tags sources in internal wiki databases automatically, cutting thesis review cycles by 40% across multi-department research submissions.
Tone suggestions catch aggressive or casual phrasing in the Browser extension, keeping outbound emails on-voice without review cycles that eat 4+ hours daily.
Grammar checker flags subject-verb disagreement, comma splices, and tense inconsistencies that human eyes miss after hours of editing - before client delivery.
Pricing Comparison & PlansHigh· Verified May 30, 2026
Grammarly Plans
Free tier available
Free
FreeBest for: Ideal for individuals needing basic grammar and spelling checks to improve their writing.
- ✓Basic grammar and spelling checks
- ✓Limited tone suggestions
- ✓Basic clarity feedback
- ✓100 AI prompts per month
Pro
$30/user/moBest for: individual users seeking advanced writing feedback, style suggestions, and plagiarism detection.
- ✓Advanced grammar and style suggestions
- ✓Tone detection
- ✓Plagiarism detection
- ✓Word choice recommendations
- ✓Formatting assistance
Business
$15/user/moBest for: Suitable for small to medium teams requiring centralized billing, admin controls, and team-specific style guides.
- ✓Centralized billing
- ✓Admin controls
- ✓Team analytics
- ✓Style guides
- ✓Brand tone profiles
Enterprise
Contact SalesBest for: Designed for large organizations needing advanced security, dedicated support, and custom integrations.
- ✓Customized pricing
- ✓Volume discounts
- ✓Negotiated pricing
QuillBot Plans
Free tier available
Free
FreeBest for: Ideal for casual users needing basic paraphrasing and grammar checks
- ✓Paraphrase up to 125 words per use
- ✓2 Paraphrasing modes (Standard & Fluency)
- ✓Limited use of Synonym Slider
- ✓Summarizer up to 1,200 words
- ✓Basic grammar error correction
Premium
$20/moBest for: individuals requiring unlimited access to advanced AI writing tools, including full paraphrasing modes and plagiarism detection
- ✓Unlimited words in Paraphraser
- ✓Unlimited Custom & 9 predefined modes
- ✓Full use of Synonym Slider
- ✓Unlimited Freeze Words
- ✓6,000 words in Summarizer
Team
$2.91/user/moBest for: Designed for businesses and educational institutions needing collaborative features, centralized billing, and dedicated support
- ✓All Premium plan features
- ✓Administrative features to manage your team
- ✓Centralized billing
- ✓Writer-management dashboard
- ✓Team style guides
Capability Breakdown
5 differences found across 20 standardized features
- •Grammar checking
- •Plagiarism detection
- •Tone suggestions
- •Style improvements
- •Browser extension
- •MS Office plugin
- •Mobile app
- •Team style guide
- •Paraphrasing tool
- •Grammar checker
- •Plagiarism checker
- •Citation generator
- •Summarizer
- •Co-writer
- •Translator
- •Word flipper modes
- •MS Word add-in
- •Chrome extension
- •Flow mode
- •Compare modes
Strengths & Limitations
Evaluative strengths and weaknesses: not feature lists
- +Integrates seamlessly across browsers, desktop apps, and mobile
- +Real-time tone detection adjusts writing for specific audiences
- +Comprehensive free version covers core grammar and spelling needs
- +Style guide feature ensures brand consistency for business teams
- +Plagiarism checker compares text against billions of web pages
- −Suggestions can be overly prescriptive, stifling creative or nuanced writing styles
- −Advanced features (plagiarism, style guides) are locked behind a pricey Pro plan
- −Can occasionally misinterpret context, offering grammatically correct but nonsensical changes
- −Offline functionality is limited; requires an internet connection for full analysis
- −Generative AI features lag behind dedicated tools like Jasper or Copy.ai
- +Seven distinct paraphrasing modes to control tone and style
- +Adjustable synonym slider for precise vocabulary control
- +Integrates directly into Chrome, Word, and Google Docs
- +Generous free plan with core paraphrasing and grammar tools
- +Co-Writer combines research, writing, and citation in one UI
- −Free plan has strict character limits on the paraphraser
- −Lacks advanced, long-form content generation of competitors
- −Plagiarism checker only available on the Premium plan
- −Can sometimes produce awkward or unnatural phrasing
- −Fact-checking capabilities are limited or non-existent
At a Glance
Recent Price History
Grammarly removed the "Premium" plan
Plan removed · May 30, 2026
Grammarly updated "Business" from $15/mo to Custom
Price change · May 30, 2026
Grammarly added a new "Pro" plan at $30/user/mo
Plan added · May 30, 2026
QuillBot added a new "Team" plan (Custom pricing)
Plan added · May 30, 2026
Grammarly removed the "Pro" plan
Plan removed · May 21, 2026
Grammarly added a new "Business" plan at $15/mo
Plan added · May 21, 2026
QuillBot raised "Premium" from $13 to $19.95/mo (53%)
Price change · May 21, 2026
Frequently Asked Questions
Related Comparisons
Sources & Data Trail · Grammarly
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-05-30)
- 2.Official Website·Official vendor website
- 3.G2·G2 verified reviews · 4.7/5 · 13,700 reviews
- 4.Capterra·Capterra verified reviews · 4.7/5
- 5.TrustRadius·TrustRadius verified reviews
- 6.PeerSpot·PeerSpot enterprise peer reviews
Sources & Data Trail · QuillBot
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-05-30)
- 2.Official Website·Official vendor website
- 3.G2·G2 verified reviews · 4.6/5 · 77 reviews
- 4.Capterra·Capterra verified reviews · 4.7/5
- 5.TrustRadius·TrustRadius verified reviews
- 6.PeerSpot·PeerSpot enterprise peer reviews