Grammarly is the most polished and accessible AI writing assistant available. It catches errors other tools miss, offers smart rewrites, and works seamlessly across nearly every platform. At $12/month for Premium, it's an excellent value for anyone who writes regularly — from emails to long-form content.
Grammarly is an AI-powered writing assistant that checks grammar, spelling, punctuation, clarity, and tone in real time. Available as a browser extension, desktop app, mobile keyboard, and integrations with Google Docs, Microsoft Office, and more, it's designed to improve your writing wherever you write.
Beyond basic grammar checking, Grammarly Premium offers AI-powered rewriting suggestions, tone detection, plagiarism checking, and brand tone features for teams. The recent addition of generative AI features puts it in direct competition with tools like ChatGPT for content creation.
We used Grammarly Premium daily for 4 weeks across a variety of writing tasks:
This is Grammarly's bread and butter, and it excels at it. In our testing, Grammarly consistently caught errors that other tools missed — including subtle subject-verb agreement issues, misplaced modifiers, and contextually incorrect word usage.
"Grammarly doesn't just underline errors — it explains why something is wrong and offers multiple correction options. This makes you a better writer over time, not just a cleaner one."
The free tier handles basic grammar and spelling well, but Premium unlocks advanced suggestions for clarity, conciseness, and delivery that are genuinely useful for professional writing.
Grammarly's generative AI features let you generate drafts, rewrite sentences, change tone, and summarize text directly within the editor. We found the AI suggestions to be contextually aware and generally high quality, though not quite at the level of dedicated AI writing tools like Claude or ChatGPT for long-form generation.
Where Grammarly's AI shines is in its rewriting suggestions. Highlight a clunky sentence, and Grammarly will offer 2-3 cleaner alternatives that maintain your meaning while improving readability. This inline AI assistance feels more natural than switching to a separate AI tool.
Grammarly works almost everywhere. The browser extension integrates with Gmail, Google Docs, Twitter, LinkedIn, Slack, and hundreds of other web apps. The desktop app provides a clean writing environment, and the mobile keyboard ensures your writing is polished on the go.
The Google Docs integration is particularly strong — Grammarly suggestions appear inline without disrupting your workflow. Microsoft Office integration works well on both Mac and Windows, though it can occasionally feel slightly slower than the browser extension.
Grammarly offers three tiers:
The Premium plan is the sweet spot for most users. At $12/month (or $144/year), it's competitively priced against alternatives like ProWritingAid and offers more seamless integration than most competitors.
Grammarly remains the gold standard for everyday writing assistance in 2025. Its unmatched platform integration, reliable grammar checking, and improving AI features make it an essential tool for anyone who writes professionally. While it won't replace dedicated AI writing tools for long-form generation, nothing beats Grammarly for catching errors and polishing your writing in real time.