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Grammarly

Best for editing and content integrity

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 billion web pages plus academic databases to identify unoriginal content and potential copyright issues before publication. Auto-citations pull references from 20+ research databases, formatting them in MLA, APA, Chicago, and other academic styles automatically. AI content detection identifies text likely generated by AI models, with Authorship tracking showing exactly which portions were typed versus AI-suggested—essential for academic honesty and editorial transparency. The Humanize feature rewrites AI-generated content to sound more natural and less detectably artificial. GrammarlyGO serves as a generative assistant for drafting, brainstorming topic ideas, rephrasing awkward sentences, and adjusting tone from formal to conversational. The system provides context-aware corrections, understanding intent to suggest improvements beyond mechanical grammar rules. For students, academics, journalists, and professionals where writing quality and integrity matter, Grammarly provides essential safeguards alongside writing enhancement. The free tier offers solid grammar checking, while Premium unlocks advanced features including plagiarism detection, tone adjustment, and GrammarlyGO.

AI Models

GrammarlyGOProprietary NLP and detection models

Key Features

  • 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
  • Context-aware corrections understanding intent
  • Tone adjustment from formal to conversational
  • Cross-platform: web, desktop, mobile, browser extensions

Integrations

Google DocsMicrosoft WordOutlookGmailSlackLinkedIn

Pricing

Free$0/month

Grammar and spelling checks, basic tone detection

Pro$12/month

Plagiarism, GrammarlyGO, advanced suggestions, tone rewriting

EnterpriseCustom pricing

Organization-wide deployment, advanced analytics, custom style guides, SSO, API access

Pros & Cons

Pros

  • Plagiarism detection essential for academic integrity
  • AI detection and authorship tracking unique in market
  • Cross-platform availability fits any workflow

Cons

  • Premium required for most valuable features
  • Some suggestions can be overly prescriptive

Who should buy this

Grammarly

Best for
  • 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)
Not ideal for
  • Buyers needing on-prem deployment (cloud-only)
  • Specialist writers (journalists, novelists) who find rule-based suggestions over-prescriptive
Realistic monthly cost

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

CapabilityGrammarly
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
Supported Partial Not supported No data

Security & compliance

Standard / controlGrammarly
SOC 2
Type II
HIPAA
GDPR
SSO / SAML
RBAC
Audit logs
Trains on customer data
No
Grammarly verified at grammarly.com

What users say

Grammarly

Reddit sentiment: Mixed
Notable customers

Cisco, Atlassian, Zoom, Expedia, Databricks

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