Grammarly

Grammarly is an AI-powered writing assistance platform that operates across documents, desktop applications, mobile devices, and browsers. It provides real-time checks for spelling, grammar, clarity, and tone while offering generative rewriting and text creation tools. The product helps individuals and organizations turn thoughts into clear, professional writing.

• Grammar, spelling, and proofreading corrections
• Paragraph rewrites for clarity and flow
• Tone suggestions to adapt messages for different contexts
• Humanizer agent and AI detector agent
• Plagiarism detection
• AI text generation prompts
• Citation consistency and generation tools
• Admin controls, security features, and data loss prevention for organizations

Pros

• Cross-platform availability allows writing assistance to follow users across apps, browsers, and mobile keyboards.
• Provides granular tone adjustments and style guide enforcement to keep communications on-brand.
• Includes specialized agents for detecting AI-generated text and giving writing more personality.
• Offers a free tier covering core grammar and spelling corrections with no upfront cost.

Cons

• AI prompt limits apply on lower tiers, restricting generation features to 100 prompts per month on the free plan and 2,000 prompts per member per month on the Pro plan.
• Advanced enterprise controls like data loss prevention, custom roles, and enterprise key management require upgrading to the Enterprise tier.
• Plagiarism detection and full-sentence rewriting are locked behind paid tiers and are not available in the free version.

Grammarly fits individuals seeking to eliminate spelling and grammar mistakes, as well as teams and enterprise organizations looking to drive consistent, professional communication across departments like marketing, sales, HR, and customer support. It is a poor fit for users who require entirely offline writing tools or those who do not use supported browser, desktop, or mobile environments.

Grammarly uses a freemium model with a free tier and paid plans. The Free tier costs $0 USD per month and includes 100 AI prompts per month and basic writing corrections. The Pro tier is listed as most popular for individuals or teams, priced at $12 USD per member per month when billed annually, or $30 when billed monthly, and includes 2,000 AI prompts per member per month, full-sentence rewrites, tone adjustments, plagiarism detection, and AI detection. The Enterprise tier is built for larger organizations with custom pricing available upon contacting sales, featuring unlimited AI prompts, dedicated support, confidential mode, data loss prevention, and custom roles and permissions.

Unlike standard built-in spell checkers or isolated word processors, Grammarly functions as a persistent AI writing partner that follows users across various apps, websites, email clients, and text boxes. It combines traditional proofreading with modern generative AI capabilities, humanizer agents, and brand tone enforcement, backed by enterprise-grade security controls that prevent third-party model training on user content.

Browser extensions, desktop applications, mobile keyboards, email clients, and Zendesk text boxes.