What Grammarly Does in 2026
Grammarly has evolved well beyond spell check. The current product is a writing assistant that works everywhere you type: email, Google Docs, Slack, social media, CMS platforms, and basically any text field in your browser.
The core value remains error prevention. Grammarly catches grammar mistakes, awkward phrasing, punctuation errors, and unclear sentences in real-time as you write. A red or yellow underline appears, you click it, and the fix is applied. No switching apps, no copying text somewhere else.
The AI layer adds content generation, tone adjustment, full paragraph rewrites, and brainstorming capabilities. These make Grammarly a writing tool, not just an editing tool.
The Free Tier
Grammarly Free catches basic grammar, spelling, and punctuation errors. It works in your browser through the Chrome extension and in the desktop app. For someone who writes professionally and needs a basic safety net, the free tier is genuinely useful.
What it does not do: detect tone, suggest clarity improvements, check for plagiarism, or offer AI-powered rewrites. For those, you need Premium.
Premium Features
Tone detection tells you how your writing sounds to the reader: formal, informal, confident, concerned, friendly, direct. This is useful for professional communication where tone matters.
Clarity suggestions flag wordy sentences, passive voice, and unclear phrasing. These go beyond grammar into style improvement.
Full-sentence rewrites suggest alternative ways to express the same idea. Click to see options, choose the best one.
AI writing generation lets you describe what you want and Grammarly drafts it. The quality is acceptable for short pieces like emails and social posts but falls below Claude or ChatGPT for longer content.
Plagiarism detection checks your writing against billions of web pages. Useful for content teams and students.
Pricing
Free: grammar, spelling, punctuation. Premium: $12/month (billed annually) or $30/month (billed monthly). Business: $15/member/month with team features.
At $12/month, Premium is a reasonable investment for anyone who writes professionally. The clarity and tone features alone justify the cost for people who send important emails daily.
How It Compares to AI Assistants
Grammarly and ChatGPT/Claude are not competing products. Grammarly is a passive assistant that watches everything you type and catches problems. ChatGPT is an active tool you go to when you need content created.
The ideal setup for a professional writer is both: Claude or ChatGPT for generating and drafting content, Grammarly for catching errors and polishing everything you type across all platforms. They cover different parts of the writing workflow.
The Bottom Line
Grammarly remains the best real-time writing assistant available. The AI writing features are a nice addition but not the reason to subscribe. Subscribe because it catches embarrassing errors in your emails, proposals, and communications before anyone else sees them. That alone is worth $12/month for any professional.