# Grammarly > AI-powered writing assistant that helps improve grammar, clarity, tone, and style across all your writing. Grammarly is an AI-powered writing assistant trusted by over 40 million people and 50,000 organizations worldwide. It helps users write clearly, confidently, and professionally by providing real-time suggestions for grammar, spelling, punctuation, clarity, tone, and style. The platform works seamlessly across more than 1 million applications and websites, making it an essential tool for anyone who writes in English. - **Grammar and Spelling Checker** provides instant corrections for grammatical errors, typos, and spelling mistakes as you write, ensuring polished and professional communication. - **Tone Detection and Adjustment** analyzes your writing tone and offers suggestions to help you strike the right balance for your audience, whether formal, friendly, or confident. - **Generative AI** accelerates productivity by helping create first drafts, outlines, and content that reflects your needs and voice with AI-powered prompts. - **Plagiarism Checker** scans your work against billions of web pages to detect potential plagiarism and ensure originality in your writing. - **AI Detector** identifies AI-generated content in your writing so you know exactly where edits are needed. - **Style Guide and Brand Tones** allows teams to upload company style guides and create tone profiles to keep all organizational writing consistent and on-brand. - **Knowledge Share** surfaces relevant company information as employees type, reducing time spent searching through documents. - **AI Agents** including Citation Finder, AI Grader, Expert Review, and Reader Reactions provide specialized assistance for academic and professional writing tasks. - **Multilingual Support** offers writing assistance in English, Spanish, French, German, Portuguese, and Italian with instant translation capabilities. To get started, sign up for a free account at grammarly.com and install the browser extension or desktop app. Grammarly integrates with popular tools like Google Docs, Microsoft Word, Gmail, Outlook, Slack, and many more, providing consistent writing assistance wherever you work. ## Features - Grammar and spelling checker - Tone detection and adjustment - Full sentence rewrites - Generative AI writing assistance - Plagiarism checker - AI detector - AI humanizer - Paraphrasing tool - Citation generator - Style guide integration - Brand tones - Knowledge Share - Strategic suggestions - Multilingual support - AI agents (Citation Finder, AI Grader, Expert Review, Reader Reactions) - Word counter - Analytics dashboard - SAML single sign-on - Admin controls and permissions - Data loss prevention ## Integrations Google Docs, Microsoft Word, Gmail, Microsoft Outlook, Slack, Salesforce, Microsoft PowerPoint, LinkedIn, Microsoft Teams, Google Sheets, Zendesk, Jira, Google Chrome, Safari, Firefox, Microsoft Edge ## Platforms WINDOWS, MACOS, LINUX, ANDROID, IOS, WEB, API, BROWSER_EXTENSION ## Pricing Freemium — Free tier available with paid upgrades ## Links - Website: https://www.grammarly.com - Documentation: https://support.grammarly.com/hc/en-us - EveryDev.ai: https://www.everydev.ai/tools/grammarly