Grammarly Review 2026: Still the Best AI Grammar Checker?
Grammarly works across every app you use to catch grammar errors, improve tone, and now generate text. Here is our full 2026 review.
Alex Morgan
June 11, 2026 · 9 min read
What Is Grammarly?
Grammarly is an AI writing assistant that works inline across your browser, email client, and apps to catch grammar errors, improve clarity, suggest better word choices, and detect tone issues in real time. In 2026, it has expanded beyond grammar checking to offer AI-generated text suggestions, a full email drafting assistant, and a plagiarism checker.
Key Features
Real-Time Grammar & Style Correction
Grammarly's browser extension and desktop app work everywhere you type — Gmail, Google Docs, LinkedIn, Notion, Slack, Word, and thousands of other apps. Underlined suggestions appear as you write, covering grammar, punctuation, clarity, wordiness, and word choice.
Tone Detection
Grammarly Premium detects the tone of your writing — formal, confident, friendly, direct, diplomatic — and flags mismatches with your intended communication. Exceptionally useful for professional emails and client-facing communications.
Grammarly GO (AI Writing)
The AI writing feature lets you ask Grammarly to rewrite paragraphs, change tone, make text shorter or longer, or generate a full reply to an email. The quality is solid for quick adjustments, though it does not match Claude or ChatGPT for longer generation tasks.
Plagiarism Checker
Premium and Business plans include a plagiarism checker that compares your text against 16 billion web pages. Essential for academic writing and content creators publishing original work.
Pricing
| Plan | Price | AI Writing | Plagiarism |
|---|---|---|---|
| Free | $0 | Limited | No |
| Premium | $12/month | Yes | Yes |
| Business | $15/member/month | Yes | Yes + style guide |
Our Verdict
Grammarly earns a 4.4/5. For professionals and non-native English speakers, it remains the single best investment for improving everyday writing quality. The real-time feedback across all your apps catches errors that other tools miss. The Premium plan at $12/month is worth it for anyone who writes professionally — the tone detection and plagiarism checker alone justify the cost.
Frequently Asked Questions
Is Grammarly worth the money?
For professional writers, non-native English speakers, or anyone who sends emails and documents regularly — yes. The free plan handles basic grammar; Premium adds tone detection, clarity improvements, and AI writing that are worth $12/month for most professionals.
Can Grammarly replace ChatGPT?
No — they complement each other. Use ChatGPT to generate and rewrite content, then Grammarly to polish grammar, tone, and style inline in your apps. Grammarly cannot generate content from scratch; ChatGPT cannot work inline across your apps.
See also: best AI writing tools 2026 and best ChatGPT alternatives 2026.
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Recommended tools
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Grammarly
Free
Grammarly is the best AI grammar checker and writing polish tool in 2026. The free tier is genuinely useful for everyday writing; Premium at $12/month is worth it for professionals who write frequently. It's not a replacement for a generative AI like Claude, but nothing beats it for catching errors and improving clarity.
ChatGPT
Free
ChatGPT is the most versatile AI assistant in 2026, combining GPT-4o's speed with DALL-E 3 image generation and a vast plugin ecosystem. The free tier is surprisingly capable; Plus at $20/month is worth it for power users who need image generation, real-time web access, and custom GPTs.
Writesonic
Free
Writesonic is the best-value AI writing tool in 2026 — it packs AI article writing, web-connected chat, image generation, and SEO tools into a single affordable platform. The free tier is genuinely useful, and the $20/month Individual plan beats Jasper on price by miles.