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Grammarly

AI-powered writing assistant that goes beyond grammar. Tone detection, brand voice enforcement, AI content generation, and plagiarism checks — works across 1M+ apps.

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Pricing: Free plan available. Pro $12/member/mo (annual). Enterprise custom pricing.

About Grammarly

Grammarly has evolved far beyond a grammar checker into a full AI writing platform for marketers. It catches grammar and spelling issues, but more importantly, it detects and adjusts tone, enforces brand voice consistency across teams (Enterprise), generates content with AI prompts, and checks for plagiarism. The browser extension works across virtually every web app — Gmail, Google Docs, Slack, HubSpot, social media platforms — making it the always-on writing quality layer for your entire marketing operation. For teams, the Enterprise plan offers style guides that enforce consistent brand voice across every piece of copy your team writes, from email campaigns to social posts.

Features

  • AI writing assistant with content generation
  • Tone detection and adjustment
  • Brand voice and style guide enforcement (Enterprise)
  • Plagiarism detection
  • Grammar, spelling, and clarity rewrites
  • Works across 1M+ apps via browser extension
  • 2,000 AI prompts/month on Pro plan

Use Cases

  • Maintain consistent brand voice across all marketing channels
  • Polish blog posts, email campaigns, and social copy
  • Generate headlines and meta descriptions with AI
  • Enforce team-wide writing standards via style guides
  • Quick-edit ad copy for clarity and tone

Pros

  • + Works everywhere via browser extension — near zero friction
  • + Best-in-class grammar and clarity engine
  • + AI writing features rival dedicated copywriting tools
  • + Brand voice enforcement is powerful for marketing teams
  • + Very easy onboarding with virtually no learning curve
  • + Genuinely useful free tier

Cons

  • - Pro plan is $30/month on monthly billing
  • - AI prompt limits can feel restrictive for heavy users
  • - Brand voice features locked behind Enterprise pricing
  • - Not a replacement for dedicated long-form content tools
  • - Occasional over-correction of intentional stylistic choices

Integrations

google-docs gmail slack microsoft-office hubspot salesforce notion

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Added: 2026-02-23 · Last updated: 2026-02-23