Grammarly vs QuillBot: Which AI agent is better?
Compare pricing, AI models, integrations, security posture, pros, cons, and buyer fit before choosing the right AI writing agent for your workflow.
Verdict: Grammarly vs QuillBot
Pick Grammarly if you need editing and content integrity. Pick QuillBot if you need paraphrasing and rewriting.
QuillBot wins on price.
Grammarly integrates with 6 platforms.
Grammarly
Grammarly has expanded far beyond grammar checking into a comprehensive writing assistant with critical features for academic and professional integrity. The plagiarism detector scans against 16 billi...
- Grammar and plagiarism checking against 16B web pages
- Auto-citations from 20+ research databases in multiple formats
- AI content detection and Authorship tracking (AI vs typed)
- Humanize feature for naturalizing AI-generated text
- GrammarlyGO for drafting, brainstorming, rephrasing
- Plagiarism detection essential for academic integrity
- AI detection and authorship tracking unique in market
- Cross-platform availability fits any workflow
- Premium required for most valuable features
- Some suggestions can be overly prescriptive
QuillBot
QuillBot is an AI-powered writing assistant ranked #43 on the a16z Top 100 Gen AI Apps list, specializing in paraphrasing, grammar correction, and text enhancement. The platform's core paraphraser off...
- 9+ paraphrasing modes with custom mode support: Standard, Fluency, Formal, Simple, Creative, Expand, Shorten
- AI grammar checker with contextual suggestions
- Plagiarism detector comparing against billions of sources
- Text summarizer for condensing long documents
- Citation generator supporting APA, MLA, Chicago formats
- Seven paraphrasing modes cover virtually any rewriting need
- 50M+ users validate reliability for academic and professional use
- Browser extension integrates seamlessly into existing writing workflows
- Free tier limited to basic paraphrasing with word limits
- Plagiarism detection only available on Premium plans
Who should buy this
Grammarly
- Mid-market or enterprise org standardizing writing voice across thousands of employees
- Academic or editorial team needing plagiarism detection + AI-content detection
- Writer/student wanting strong cross-platform coverage (web + Word + Gmail + browser)
- Buyers needing on-prem deployment (cloud-only)
- Specialist writers (journalists, novelists) who find rule-based suggestions over-prescriptive
Solo: Free or $12/mo Pro. Team: $15/seat/mo Business. Enterprise: custom (typically $30-60/seat for orgs of 150+).
Verified 2026-05-02
Capabilities at a glance
| Capability | Grammarly | QuillBot |
|---|---|---|
| Grammar + spelling correction | Across 500K+ apps | — |
| Plagiarism detection | 16B+ web pages, Pro+ | — |
| AI-content detection + Authorship tracking | — | |
| Tone & style customization | Org-wide style guides on Enterprise | — |
| Cross-platform (Web, Word, Outlook, Gmail, Slack) | — | |
| On-prem / self-hosted | — |
Security & compliance
| Standard / control | Grammarly | QuillBot |
|---|---|---|
| SOC 2 | Type II | — |
| HIPAA | — | |
| GDPR | — | |
| SSO / SAML | — | |
| RBAC | — | |
| Audit logs | — | |
| Trains on customer data | No | — |
What users say
Grammarly
Cisco, Atlassian, Zoom, Expedia, Databricks
Frequently asked questions
Which is cheaper, Grammarly or QuillBot?+
Grammarly's Pro plan is $12/month and QuillBot's Premium plan is $8.33/month. QuillBot is the cheaper entry point.
What AI models do Grammarly and QuillBot use?+
Grammarly runs on GrammarlyGO, Proprietary NLP and detection models. QuillBot runs on Proprietary NLP models, Custom paraphrasing models.
What is the main difference between Grammarly and QuillBot?+
Grammarly is positioned as best for editing and content integrity, while QuillBot is positioned as best for paraphrasing and rewriting. Pick the one whose strength aligns with your primary use case.
Which has better integrations, Grammarly or QuillBot?+
Grammarly integrates with Google Docs, Microsoft Word, Outlook, Gmail and 2 more. QuillBot integrates with Chrome Extension, Microsoft Word, Google Docs, macOS app.
What are the main weaknesses of Grammarly and QuillBot?+
Grammarly's main drawback: premium required for most valuable features. QuillBot's main drawback: free tier limited to basic paraphrasing with word limits.
Are Grammarly and QuillBot worth it in 2026?+
Both remain competitive writing options in 2026. Grammarly stands out for plagiarism detection essential for academic integrity. QuillBot stands out for seven paraphrasing modes cover virtually any rewriting need. Choose based on which trade-offs fit your workflow and budget.