Grammarly

AI Writing Assistant, Plagiarism Checker, Writing and Proofreading Tools
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freemium★★★★★★★★★☆9.2

TL;DR

Grammarly is an AI-powered writing assistant that checks grammar, tone, and clarity across emails, documents, and web content in real time.

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Key Facts

VendorGrammarly
Best fit
SMBEnterprise

Free version: Grammarly offers a free browser extension and web editor with basic grammar and spelling checks.

Pricing

Starting at Free tier available; premium starts around $12/month

Free TierFree TrialBrowser ExtensionMacWindowsiOSAndroidSaaS
Most Popular

Free

$0
Free
Cloud
  • Grammar and spelling checks
  • Basic writing suggestions
  • Browser extension

Premium

$12/month
Monthly
Cloud
  • Clarity and tone suggestions
  • Plagiarism checker
  • Genre-specific writing style checks
  • Priority support

Business

$15/user/month
Monthly
Cloud
  • Team collaboration tools
  • Brand tone customization
  • Admin panel and billing
  • SSO and account provisioning

Additional Pricing Information

Premium is commonly billed around $12/month per user with discounts for annual plans. Business pricing scales per seat.

Details

What is Grammarly?

Grammarly is one of the most widely used AI writing assistants, offering real-time grammar, spelling, tone, and clarity suggestions inside browsers, desktop apps, and mobile keyboards. Reviewers score it 9.2 out of 10 across 390 TrustRadius reviews, noting strong core accuracy and broad platform coverage while flagging occasional strictness and integration quirks. It works well for professionals, marketers, and teams that want cleaner daily communication without leaving their usual apps.

Key Features

  • *Grammar and Spelling** — Real-time corrections across apps and browsers
  • *Tone and Clarity** — Suggestions to match intended audience and formality
  • *Plagiarism Checker** — Prohibited-snippet detection for premium users
  • *Style Guides** — Custom rules for teams and brands
  • *Integrations** — Word, Outlook, Slack, Google Docs, and major browsers
  • *Performance Insights** — Writing statistics and weekly goals

Who is it for?

  • Professionals writing emails, reports, or proposals daily
  • Marketing and content teams wanting consistent tone
  • Students and non-native speakers improving English writing
  • Teams deploying lightweight AI writing guardrails

Who is it NOT for?

  • Writers who need deep structural or developmental editing
  • Teams with strict offline or air-gapped document workflows
  • Users wanting fully open-source or self-hosted tooling
  • Highly technical teams with lots of jargon Grammarly may flag incorrectly

The Bottom Line

Grammarly is the easiest writing-quality upgrade most people can make. It is not perfect, but the free tier alone catches enough mistakes to justify using it. If you need deeper style coaching or offline control, layer it with ProWritingAid or a dedicated editor.

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