Grammarly is a writing assistant focused on grammar, spelling, and style corrections, while Claude is a general-purpose AI chatbot designed for conversation, analysis, and content creation. Grammarly integrates into your writing tools, whereas Claude operates as a standalone conversational platform.
Grammarly vs Claude — Side-by-side comparison on A Versus B
AI-powered writing assistant focused on grammar, clarity, tone, and style across 500+ platforms.
Advanced AI assistant excelling in reasoning, writing, and analysis
Primary Function. Integration Capability. Reasoning and Analysis. Real-time Writing Feedback. Content Generation Quality. Free Tier Functionality. Monthly Subscription Cost
Choose Grammarly if you want passive, always-on writing corrections integrated into your existing workflows and email. Choose Claude if you need a versatile AI assistant for creative writing, problem-solving, analysis, coding help, and long-form content generation. They serve different needs: Grammarly perfects what you write, Claude helps you write from scratch.
Grammarly: $108 (with discount) | Claude: N/A
Grammarly: Advanced AI detector included | Claude: N/A
Grammarly: Multiple with full AI | Claude: N/A
Grammarly: Good for quick reviews | Claude: N/A
Grammarly: Unlimited (basic) | Claude: N/A
Grammarly: English (4 dialects) | Claude: N/A
Grammarly: 50+ (with GrammarlyGO) | Claude: N/A
Grammarly: Limited (basic checks only) | Claude: N/A
Grammarly: No (proprietary) | Claude: N/A
Grammarly: $12/month (annual) | Claude: $20
Grammarly: 150+ apps (Gmail, Office, Slack, etc.) | Claude: Web interface + API only
Grammarly: Not applicable | Claude: 200,000 tokens
Grammarly: Basic grammar and spell check only | Claude: Full Claude 3.5 Sonnet with usage limits
Grammarly: Yes—instant feedback while typing | Claude: No—requires manual submission
Grammarly: 500+ integrations | Claude: N/A
Grammarly: Unlimited (limited features) | Claude: N/A
Monthly Subscription Cost (Premium/Pro Tier)
Grammarly: $12.00/month | Claude: $20.00/month
Annual Subscription Cost (Premium/Pro Tier)
Grammarly: $144.00/year | Claude: $240.00/year
Grammarly: Single document | Claude: 200,000 tokens
Grammarly: 500+ integrations | Claude: API only (requires custom setup)
Grammarly: Limited (rewrites only) | Claude: Up to 150,000 words
Grammarly: Yes (500+ apps) | Claude: No (manual input required)
Grammarly: Yes (basic corrections only) | Claude: Yes (limited usage)
Grammarly: $11.67/month (annual billing) | Claude: N/A
Grammarly: Unlimited suggestions | Claude: N/A
Grammarly: 2 tones (basic free; more in premium) | Claude: N/A
Grammarly: 500+ (Google Docs, Gmail, Word, Slack, LinkedIn) | Claude: N/A
Grammarly: Included with Premium ($7.99/month addon available separately) | Claude: N/A
Grammarly: 250+ grammar, spelling, punctuation rules | Claude: N/A
Grammarly: 30 days full premium access | Claude: N/A
Grammarly: 500,000+ websites/apps | Claude: N/A
Grammarly: 100+ writing styles | Claude: N/A
Grammarly: N/A | Claude: Won coding tests
Grammarly: N/A | Claude: Slower (more thorough)
Grammarly: N/A | Claude: Growing adoption
Grammarly: N/A | Claude: Excellent (leading tool)
Grammarly: N/A | Claude: Text and code focused
Grammarly: N/A | Claude: Superior (Claude 4.6)
Grammarly: N/A | Claude: Standalone platform
Grammarly: N/A | Claude: Nuanced and contextual
Grammarly: N/A | Claude: 3 (text, image, PDF)
Grammarly: N/A | Claude: Sonnet 4.6, Opus 4.8
Grammarly: N/A | Claude: #1 (Opus 4.8 + Claude Code)
Grammarly: N/A | Claude: Via integrations / Computer Use
Grammarly: N/A | Claude: Strong (esp. European + Japanese)
Grammarly: N/A | Claude: Strict tool use + JSON schemas
Grammarly: N/A | Claude: Limited (API-based)
Grammarly: N/A | Claude: Claude Code + Computer Use
Grammarly: N/A | Claude: MCP-based (growing)
Grammarly: N/A | Claude: iOS/Android, catching up
Grammarly: N/A | Claude: Explicit cache markers (5m / 1h)
Grammarly: N/A | Claude: No public fine-tuning
Grammarly: N/A | Claude: Cloud-only (Bedrock / Vertex)
Grammarly: N/A | Claude: ~50 RPM / 40K ITPM (Sonnet 4.6)
Grammarly: N/A | Claude: Sonnet 4.6 (rate-limited)
Grammarly: N/A | Claude: Claude Pro $20/mo
Grammarly: N/A | Claude: Max $100–$200/mo
Grammarly: N/A | Claude: Sonnet 4.6: $3.00
Grammarly: N/A | Claude: Web browser only, no native integration
Grammarly: N/A | Claude: No integration, manual file uploads required
Grammarly: N/A | Claude: Strict safety guidelines
Grammarly: N/A | Claude: $20/month (Claude Pro)
Grammarly: N/A | Claude: April 2024 (static)
Grammarly: N/A | Claude: 92% (HumanEval)
Grammarly: N/A | Claude: $20 (Claude Pro)
Grammarly: N/A | Claude: 5+ (Web, iOS, Android, API, third-party apps)
Grammarly: N/A | Claude: 2-6 seconds average
Grammarly: N/A | Claude: 89% user satisfaction
Grammarly: N/A | Claude: Yes (fully independent)
Grammarly: N/A | Claude: 500-2000ms (chat response)
Grammarly: N/A | Claude: Web, iOS, Android, API
Grammarly: N/A | Claude: Claude 3.5 Sonnet, Claude 3 Opus, Claude 3 Haiku
Grammarly: N/A | Claude: ~10 million (reported by Anthropic, 2024)
Grammarly: N/A | Claude: ~10MB per upload (practical limit)
Grammarly: N/A | Claude: 2 years (launched March 2024)
Grammarly: N/A | Claude: Limited (API/plugins)
Grammarly: N/A | Claude: Third-party only
Grammarly: N/A | Claude: ~15 million (est. 2026)
Grammarly: N/A | Claude: $3 (Opus) / $0.80 (Haiku)
Grammarly: N/A | Claude: Claude 3.5 Haiku (capable)
Grammarly: N/A | Claude: No (April 2024 cutoff)
Coding Task Accuracy (HumanEval Benchmark)
Grammarly: N/A | Claude: 88% on HumanEval
Grammarly: N/A | Claude: 8+ (Web, Desktop, API, Slack, etc.)
Grammarly: N/A | Claude: Limited (Claude Teams requires separate setup)
Grammarly: N/A | Claude: 3-6 seconds average
Grammarly: N/A | Claude: 8.7/10 standalone
Grammarly: N/A | Claude: Code, text, images, PDFs, documents
Grammarly: N/A | Claude: None (chat interface only)
Grammarly: N/A | Claude: N/A (manual conversation only)
Grammarly: N/A | Claude: Manual context provision required
Grammarly: N/A | Claude: iOS app available
Grammarly: N/A | Claude: Depends on API tier
Grammarly: N/A | Claude: Web search not available
Grammarly: N/A | Claude: 0% (knowledge-based only)
Grammarly: N/A | Claude: Excellent (optimized for depth)
Grammarly: N/A | Claude: Advanced (specialized models)
Grammarly: N/A | Claude: 0.02 GB (20MB per file)
Grammarly: N/A | Claude: Limited (image analysis only)
User Reported Reasoning Quality (Scale 1-10)
Grammarly: N/A | Claude: $20/month (Pro)
How to choose between Grammarly and Claude
Grammarly vs Claude — Structured Comparison Data
Machine-readable comparison dataset for Grammarly vs Claude. Contains 165 attribute comparisons, 5 FAQ pairs.
Grammarly vs Claude — Attribute Category Vocabulary
Taxonomy of attribute categories used to classify comparison data for Grammarly vs Claude.
Can I use Grammarly and Claude together?
Yes, they complement each other perfectly. Use Claude for drafting content, research, and brainstorming, then use Grammarly to polish and correct the final output. Since Grammarly integrates into 150+ apps, you can run Grammarly on Claude's exported text within Gmail, Google Docs, or Notion.
Does Claude replace Grammarly for writing?
No. Claude lacks real-time grammar checking and tone suggestions. While Claude can generate polished content, it won't catch errors as you type or provide explanations for grammar rules. For daily writing in emails and documents, Grammarly is superior. For creative writing and content generation, Claude is superior.
For academic writing: Claude wins for essay drafting, research synthesis, and thesis development. Grammarly wins for proofreading and ensuring compliance with style guides (APA, MLA, Chicago). Students benefit most from using both: Claude to write, Grammarly to refine.
Grammarly's free tier is minimal—basic spell check and fundamental grammar only. 90% of advanced features (tone detection, plagiarism, readability scores) require Premium. Claude's free tier is far more generous, offering full Claude 3.5 Sonnet access with daily usage limits.
Can Claude check grammar like Grammarly?
Claude can identify and correct grammar errors if you ask directly (e.g., 'proofread this email'), but it won't do so automatically or provide real-time feedback. It also won't explain grammar rules in detail like Grammarly does. For passive, always-on grammar checking, Grammarly is the only choice.
How to Choose Between Grammarly and Claude
Primary Function: Grammarly has Grammar and style corrections in real-time, while Claude has Conversational AI for multiple tasks.
Integration Capability: Grammarly has Works within email, docs, browsers (150+ apps), while Claude has Web interface and API only.
Reasoning and Analysis: Grammarly has Limited to writing suggestions, while Claude has Advanced reasoning across topics.
Real-time Writing Feedback: Grammarly has Instant corrections as you type, while Claude has Requires message submission.
Content Generation Quality: Grammarly has Limited to rephrasing and tone adjustment, while Claude has Creates long-form content from scratch.
Free Tier Functionality: Grammarly has Basic grammar and spell check only, while Claude has Full Claude 3.5 Sonnet access with rate limits.
Monthly Subscription Cost: Grammarly has $12 (Premium, billed annually), while Claude has $20 (Claude Pro).