Grammarly Review: Features, Pricing, and How to Use Every Tool

Grammarly Features: Complete Breakdown

Grammar, Spelling, and Punctuation Checking

Grammarly’s core engine detects and corrects hundreds of grammar, spelling, and punctuation errors in real time as you type. The system catches subject-verb agreement issues, misplaced modifiers, incorrect verb tenses, comma splices, run-on sentences, and commonly confused words (affect vs. effect, their vs. there vs. they’re). Each correction includes a detailed explanation of the grammar rule, helping you learn from your mistakes and improve your writing skills over time.

Beyond basic error detection, Grammarly identifies contextual spelling errors that standard spell checkers miss. For example, it recognizes when you type “manager” but meant “manager’s” based on sentence context, or flags “defiantly” when you clearly intended “definitely.” This contextual intelligence makes Grammarly significantly more accurate than built-in spell checkers in browsers or word processors.

Clarity and Readability Suggestions

Grammarly’s clarity module identifies wordy sentences, passive voice overuse, unclear phrasing, and unnecessarily complex language. It suggests concise alternatives that maintain your meaning while improving readability. The readability score provides an overall assessment of how easy your content is to understand, based on established readability formulas including Flesch-Kincaid and sentence length analysis.

For content writers, bloggers, and marketers, the clarity feature is particularly valuable. Web content performs best at a 6th to 8th grade reading level, and Grammarly’s suggestions help you hit that target without dumbing down your content. The tool highlights specific sentences that need simplification and offers concrete rewrites, rather than just flagging issues without solutions.

Tone Detection and Adjustment

Grammarly’s tone detector analyzes your text and identifies the emotional tone your writing conveys — confident, friendly, formal, informal, optimistic, concerned, direct, diplomatic, and dozens of other tonal categories. The feature shows you how your writing is likely to be perceived by readers before you hit send, helping you avoid miscommunication in emails, messages, and professional documents.

For business communication, tone detection is essential. An email that sounds curt when you intended it to be direct, or overly casual when the situation calls for formality, can damage professional relationships. Grammarly flags tonal mismatches and suggests word-level and sentence-level changes to align your writing with your intended tone. The Premium and Business plans include tone adjustment suggestions that automatically rewrite sentences to match your desired tone.

Plagiarism Detection

Grammarly Premium includes a plagiarism checker that scans your text against billions of web pages, academic papers, and published content to identify passages that match existing sources. The tool highlights matched text, provides the source URL, and calculates an overall originality score. Each flagged passage shows the percentage of matching text and a direct link to the original source for verification.

For content marketers, academic writers, and agencies producing client content, the plagiarism checker provides essential quality assurance. It catches unintentional similarity to published content, ensures original work from freelance writers, and protects against duplicate content penalties from search engines. The integration within Grammarly’s editor means you can check originality and fix writing issues in a single workflow.

GrammarlyGO: Generative AI Writing Assistant

GrammarlyGO is Grammarly’s generative AI feature that can compose, rewrite, ideate, and reply to messages using AI. You can prompt GrammarlyGO to draft emails, rewrite paragraphs in a different tone, generate outlines, summarize long documents, and brainstorm ideas. The AI considers the context of your existing text, your communication history, and your profile preferences to generate personalized suggestions.

Unlike standalone AI writing tools, GrammarlyGO integrates directly into your writing workflow across all platforms where Grammarly is installed. You can highlight any text and ask the AI to make it more formal, shorter, more persuasive, or clearer. For professionals who write dozens of emails daily, GrammarlyGO’s one-click reply suggestions and message drafting capabilities save significant time while maintaining personal writing style.

Style Guide and Brand Tones (Business)

Grammarly Business includes a custom style guide feature that lets organizations define company-specific writing rules. You can set preferred terminology (for example, always use “customer” instead of “client”), enforce capitalization standards for product names, ban jargon or outdated terms, and define brand-specific tone guidelines. Every team member’s writing is automatically checked against the style guide in real time.

Brand Tones extend this further by allowing you to define how your organization’s written communication should sound. Set brand voice attributes like “professional but approachable” or “technical but accessible,” and Grammarly flags writing that deviates from these guidelines. For marketing teams, agencies, and enterprise organizations managing brand consistency across dozens or hundreds of writers, the style guide and brand tones features eliminate the need for manual copy review.

Cross-Platform Integration

Grammarly works across virtually every platform where English text is written. The browser extension supports Chrome, Firefox, Safari, and Edge, providing real-time corrections on Gmail, Google Docs, social media platforms, CMS editors, and web-based email clients. The desktop app integrates with Microsoft Word, Outlook, PowerPoint, and other desktop applications on both Windows and macOS. Mobile keyboards for iOS and Android bring Grammarly’s corrections to messaging apps, email, and social media on mobile devices.

The Grammarly Editor (editor.grammarly.com) provides a dedicated web-based writing environment with the full suite of features including document upload support for .docx, .txt, and other formats. For teams using Slack, the Slack integration checks messages before sending. This universal coverage ensures consistent writing quality across every communication channel without requiring users to change their existing workflows.