Grammarly

What is Grammarly?

Grammarly is the most widely deployed AI writing assistant, used by over 30 million people daily across browsers, desktop apps, and mobile keyboards. It operates everywhere you write, including email clients, Google Docs, Slack, social media, and CMS platforms, checking grammar, spelling, punctuation, clarity, tone, and style in real time. Since its founding in 2009, Grammarly has become the default writing companion for professionals, students, and teams who need to communicate clearly and confidently in English.

The free tier handles core grammar, spelling, and punctuation errors with high accuracy, making it immediately useful without any payment. Premium ($12/mo) unlocks the full suite: advanced clarity and conciseness suggestions, tone detection that analyzes how your writing sounds to readers, full-sentence rewrites for improved readability, and a plagiarism detector that scans against 16 billion web pages. GrammarlyGO, the generative AI layer powered by large language models, enables drafting, rewriting, brainstorming, and composing reply suggestions with controls for tone, formality, and length directly within your workflow.

For teams and enterprises, Grammarly Business ($15/member/mo) adds a centralized style guide, brand tone profiles, an analytics dashboard tracking team writing quality over time, SAML SSO, and admin controls for managing large deployments. In 2026, Grammarly remains the safest recommendation for anyone writing professionally in English. Its key advantage over standalone AI chatbots like ChatGPT is that it works inline, inside the tools you already use, without requiring you to copy-paste text or switch contexts. The tradeoff is that its generative AI capabilities are less powerful than dedicated LLMs for creative or long-form generation, but for editing, polishing, and ensuring error-free communication, nothing matches its convenience and reliability.

Grammarly Pricing

Free — Grammar, spelling, and punctuation corrections; tone detection; basic writing suggestions across all platforms. No word limit.

Premium — $12/mo (billed annually) or $30/mo (billed monthly) — Everything in Free plus advanced clarity, engagement, and delivery suggestions; full-sentence rewrites; word choice improvements; plagiarism detection (16 billion pages); GrammarlyGO AI writing and rewriting with 1,000 prompts/mo; formatting recommendations.

Business — $15/member/mo (billed annually, min 3 members) — Everything in Premium plus brand tones, style guide, analytics dashboard, admin panel, priority support, SAML SSO, and team usage reporting.

Key Features

• Real-time grammar & spelling correction — catches errors as you type across 500,000+ apps and websites with industry-leading accuracy
• Tone detection — analyzes your writing and labels the tone (formal, friendly, confident, diplomatic, etc.) so you can adjust before sending
• Clarity & conciseness suggestions — identifies wordy phrases, passive voice, and unclear sentences with specific rewrite suggestions
• GrammarlyGO generative AI — draft new content, rewrite existing text, brainstorm ideas, and compose replies with controls for tone, formality, and length
• Plagiarism detection — checks text against 16 billion web pages and academic databases; available on Premium and Business plans
• Full-sentence rewrites — suggests complete sentence alternatives for improved readability and engagement, not just individual word changes
• Browser extension & desktop apps — works in Chrome, Firefox, Safari, Edge, plus native macOS and Windows apps; mobile keyboard for iOS and Android
• Brand voice & style guides — Business plan feature that trains Grammarly on your brand tone, terminology, and style rules for consistent team output
• Analytics dashboard — tracks team writing quality trends, common mistakes, and improvement over time for Business plan administrators
• Enterprise security — SOC 2 Type II certified, SAML SSO, admin controls, data encryption at rest and in transit, GDPR and CCPA compliant

Pros & Cons

Best For

Professional writers and business communicators who need polished, error-free emails, reports, and documents every day. Students and academics working on essays, papers, and dissertations who want grammar checking plus plagiarism detection. Marketing and content teams that need consistent brand voice and style across multiple writers. Non-native English speakers looking for real-time grammar and tone feedback to improve their professional communication.