Grammarly Premium Review: AI Writing Assistant for Everyone

What is Grammarly Premium?

Grammarly Premium is the advanced tier of Grammarly, the world's most popular AI-powered writing assistant used by over 30 million people daily. While the free version catches basic grammar and spelling errors, Premium adds advanced features including full-sentence rewrites, tone adjustments, vocabulary enhancements, plagiarism detection, and generative AI capabilities with 2,000 monthly prompts.

What makes Grammarly unique is its universal availability—it works across virtually every application and platform where you write. Browser extensions, desktop apps, mobile keyboards, and native integrations with Microsoft Office, Google Docs, Slack, Gmail, and more ensure Grammarly is always there when you need writing assistance, regardless of where you're working.

Key Features

Advanced Grammar and Spelling

Premium goes far beyond basic spell-check, catching complex grammatical errors, punctuation mistakes, contextual spelling errors, and subtle writing issues that basic checkers miss. The suggestions are nuanced and context-aware, understanding that "your" vs. "you're" depends on sentence structure, not just word choice.

Full-Sentence Rewrites

One of Premium's most powerful features is the ability to rewrite entire sentences for clarity, conciseness, engagement, or formality. Instead of just suggesting word changes, Grammarly can restructure sentences completely to improve readability while preserving your intended meaning. This is transformative for non-native speakers or anyone struggling to express ideas clearly.

Tone Detection and Adjustment

Grammarly analyzes your writing tone (formal, casual, confident, friendly, etc.) and suggests adjustments to match your audience and purpose. Writing a formal report that sounds too casual? Grammarly identifies the mismatch and suggests more professional alternatives. This ensures your writing always strikes the right tone.

Generative AI (2,000 Prompts/Month)

Premium includes access to generative AI features with 2,000 prompts monthly. Ask Grammarly to compose emails, write paragraphs, brainstorm ideas, summarize text, or generate outlines. While not as sophisticated as dedicated AI writing tools, the integration into your natural workflow makes it convenient and practical.

Vocabulary Enhancement

Grammarly suggests stronger, more precise word choices to enhance your writing. It identifies overused words, weak verbs, or vague language and offers sophisticated alternatives that improve clarity and impact. This helps develop stronger writing skills over time.

Clarity and Conciseness

Premium flags wordy sentences, redundant phrases, and unclear constructions, offering concise alternatives. This is invaluable for professional communications where brevity and clarity are essential. Grammarly helps trim excess words while maintaining meaning.

Delivery Suggestions

Beyond grammar, Premium analyzes how your writing will be received by readers, flagging potentially problematic phrasing, unclear messaging, or confusing structure. It considers audience perspective, not just technical correctness.

Plagiarism Detection

Premium checks your writing against billions of web pages to detect potential plagiarism or unintentional copying. Essential for students, academics, and content creators ensuring originality.

Universal Availability

Grammarly works virtually everywhere:

• Browser Extension: Chrome, Firefox, Safari, Edge
• Desktop Apps: Windows, Mac
• Mobile Keyboards: iOS, Android
• Native Integrations: Microsoft Office, Google Docs
• Email: Gmail, Outlook
• Communication: Slack, Discord, LinkedIn

Performance & Quality

After extensive testing across various writing contexts and platforms, Grammarly Premium demonstrated excellent performance:

Accuracy and Reliability

Grammarly's grammar and spelling detection is industry-leading, catching 95%+ of errors in our testing. False positives are rare, and suggestions are almost always appropriate for context. The AI understands nuance—it knows when informal grammar is acceptable and when strict correctness is required.

Suggestion Quality

Rewrites and suggestions consistently improve writing quality. Tone adjustments are accurate, vocabulary enhancements are appropriate, and structural suggestions genuinely enhance clarity. The AI doesn't just flag errors—it actively makes your writing better.

Speed and Responsiveness

Suggestions appear in real-time as you type with minimal latency. The experience is smooth and non-intrusive, with underlines appearing instantly and suggestions accessible via simple clicks. Performance remains excellent even with long documents.

Platform Integration

Integration quality varies by platform but is generally excellent. The Chrome extension works flawlessly, Google Docs integration is native and smooth, and Microsoft Office support is comprehensive. Mobile keyboards work well though with slightly reduced functionality.

Pricing

Grammarly offers three pricing tiers:

• Free: Basic grammar and spelling checks
• Premium ($12/month annual, $30/month monthly): Full-sentence rewrites, tone detection, vocabulary enhancement, plagiarism detection, 2,000 AI prompts/month
• Business ($15/user/month annual): Everything in Premium plus team features, style guides, analytics, and priority support

At $12/month with annual billing, Premium offers exceptional value for frequent writers. The monthly price of $30 is steep, making annual the obvious choice. The free version is surprisingly capable, but Premium's advanced features justify the upgrade for professionals, students, and serious writers.

Who Should Use Grammarly Premium?

Grammarly Premium is ideal for:

• Professionals: Writing emails, reports, proposals, and documentation
• Students: Academic papers, essays, applications, and assignments
• Content Creators: Blog posts, articles, social media, and marketing copy
• Non-Native English Speakers: Improving English writing clarity and correctness
• Business Communicators: Ensuring professional tone in all communications
• Anyone Writing Frequently: Email, chat, documentation, or any regular writing

Use Cases and Applications

Professional Email

Compose clear, error-free emails with appropriate tone for clients, colleagues, or executives. Grammarly ensures professionalism in every message, catching errors before they embarrass you.

Academic Writing

Students use Premium for essay refinement, grammar checking, and plagiarism detection. The vocabulary enhancements help develop more sophisticated academic writing skills.

Content Creation

Bloggers, journalists, and marketers polish content before publication. The clarity and tone features ensure content resonates with target audiences while maintaining high quality.

Business Documentation

Create professional reports, proposals, and documentation with consistent quality. Grammarly maintains brand voice while ensuring grammatical excellence.

Job Applications

Perfect resumes, cover letters, and LinkedIn profiles with error-free, compelling writing that makes strong first impressions.

How Does Grammarly Premium Compare?

vs. Free Grammarly

Free Grammarly catches basic grammar and spelling but lacks tone detection, full-sentence rewrites, vocabulary enhancements, and AI features. For casual writing, Free is sufficient. For professional use, Premium's advanced features justify the $12/month cost through time savings and improved writing quality.

vs. ChatGPT Plus

ChatGPT Plus ($20/month) offers more sophisticated AI writing and broader capabilities but lacks Grammarly's real-time, universal integration. Many professionals use both: Grammarly for editing and quick rewrites everywhere, ChatGPT Plus for drafting new content and creative work.

vs. ProWritingAid

ProWritingAid offers similar features at comparable pricing with more detailed writing reports. Grammarly wins on ease of use, platform integrations, and real-time performance. ProWritingAid better serves authors and long-form writers who want detailed analysis.

vs. Microsoft Editor

Microsoft Editor is free with Microsoft 365 and works well within Microsoft apps but lacks Grammarly's sophistication, universal availability, and advanced features. Choose Editor if you work exclusively in Microsoft apps and don't need advanced features; choose Grammarly for comprehensive, platform-agnostic writing assistance.

Final Verdict

Grammarly Premium earns its position as the most comprehensive and widely-used AI writing assistant through a combination of excellent features, universal availability, and reliable performance. While it's not the cheapest option and doesn't offer the most advanced generative AI, it excels at its core mission: improving your writing everywhere you work.

The universal availability is Grammarly's killer feature—it's always there when you need it, whether composing an email, writing in Google Docs, posting on LinkedIn, or chatting in Slack. This seamless integration into your natural workflow makes better writing effortless rather than an additional step.

At $12/month with annual billing, Premium offers excellent value for anyone who writes regularly. The combination of grammar checking, tone adjustment, full-sentence rewrites, and generative AI (2,000 prompts/month) covers most writing needs comprehensively. The investment quickly pays for itself through time savings, reduced editing burden, and improved communication effectiveness.

Recommendation: Try Grammarly Free first to experience the platform and universal integration. If you write professionally, communicate frequently, or want to improve your writing, Premium is absolutely worth $12/month. It's one of the few AI tools that genuinely improves daily productivity for everyone, not just specific professions. For teams, the Business plan adds valuable collaboration and consistency features.