Three things define Grammarly: its pricing structure, its feature depth, and who it's built for.

Quick Answer

Grammarly is an essential AI writing assistant that justifies its $12.00 per month annual cost for professionals needing flawless English communication, earning a 4.7-star G2 rating across 9,000 reviews. Casual writers, however, will find the $0.00 free tier perfectly adequate for basic grammar checks without needing to upgrade to the $30.00 monthly premium plan.

What Is Grammarly?

Grammarly is a dedicated AI writing assistant focused exclusively on grammar, clarity, and tone correction for the English language. Developed by Grammarly Inc., this software dominates the grammar and paraphrase category by avoiding long-form generation or SEO modes in favor of precise, real-time copy editing. The platform operates primarily through a highly responsive browser extension and direct integrations with 5 major platforms: Google Docs, Microsoft Word, Outlook, Slack, and Google Chrome. Users consistently praise its accuracy and ease of use, which is directly reflected in its outstanding 4.7-star rating across 9,000 verified reviews on G2.

While the premium version costs $30.00 on a month-to-month basis, the core functionality centers on real-time text analysis that flags punctuation errors, awkward phrasing, and tonal inconsistencies as you type. The tool does not offer an API or pre-built templates, choosing instead to refine the user's original text. By focusing strictly on editing rather than content creation, Grammarly ensures that writers maintain their unique voice while eliminating embarrassing grammatical mistakes. Whether you are drafting a quick message in Slack or formatting a report in Microsoft Word, the software runs quietly in the background.

Grammarly Key Features

Grammarly's feature set prioritizes editing and refinement over raw content generation, offering a highly specialized toolkit that justifies its $12.00 monthly annual cost. The platform maintains a 4.7-star rating largely because these core features work seamlessly across its 5 primary integrations, providing immediate value without requiring users to change their existing workflows.

Advanced Grammar and Spell Check

The grammar checking engine serves as the foundational pillar of the platform, analyzing English text in real-time to catch everything from basic typos to complex structural issues. Free users paying $0.00 receive critical red underlines for spelling and basic punctuation, ensuring that fundamental mistakes are caught before hitting send. Premium users paying $30.00 monthly get advanced blue, green, and purple underlines that offer suggestions for clarity, engagement, and conciseness. This feature operates instantly within the browser extension, ensuring that users do not have to copy and paste text into a separate window. The system explains the reasoning behind every single correction, turning the software into an educational tool rather than just a passive spell-checker. By providing these detailed explanations, the software helps users actively improve their writing skills over time, which is a major reason it maintains its 4.7-star rating across 9,000 reviews.

Tone Detector and AI Chat

Tone detection actively analyzes

Frequently asked questions

Does Grammarly work offline?

Grammarly requires an active internet connection to function. The tool relies on cloud-based servers to analyze text and provide suggestions for spelling, grammar, and punctuation. Because the processing happens on these external servers rather than on your local device, you cannot use the service while disconnected from the internet. Users needing offline capabilities will need to rely on the built-in proofreading tools provided by their specific word processors instead.

Can I use Grammarly on my mobile device?

Yes, you can use the service on mobile devices. The company provides a dedicated keyboard application available for both iOS and Android operating systems. Once installed and activated, this keyboard replaces your default typing interface and checks your text as you type across various applications, including emails, text messages, and social media platforms. The mobile version syncs with your main account to maintain consistent writing preferences across all your connected devices.

Does Grammarly integrate with Microsoft Word?

Yes, the tool integrates directly with Microsoft Word. Users can install a specific add-in designed for Microsoft Office, which places a dedicated tab within the Word ribbon. When activated, a sidebar appears next to your document, displaying suggestions for grammar, spelling, and clarity in real-time as you type. This integration allows you to review and apply corrections without needing to copy and paste your text into a separate web browser or application.

Is my text kept private when using Grammarly?

The service transmits your text to its servers over the internet to perform its analysis. The company states that it encrypts this data during transit and while stored on its servers. The privacy policy indicates that they do not sell user data to third parties. However, because the text leaves your device for processing, organizations with strict data security requirements often review the privacy terms before allowing employees to install the software on company equipment.

What is the difference between the free and paid versions?

The free version focuses strictly on basic mechanics, identifying spelling errors, missing punctuation, and fundamental grammar mistakes. The paid subscription expands on this by offering advanced suggestions related to sentence structure, vocabulary variety, and overall tone. While the free tier ensures your writing is technically correct and free of typos, the paid tier provides additional stylistic recommendations designed to make your text clearer, more concise, and better suited to your intended audience.

Grammarly Review (2026)