Head-to-head · facts checked 15 Sept 2026
Claude vs Grammarly
Claude uniquely has 24 features · Grammarly uniquely has 8 features.
From
$12/mo (Pro plan, billed annually)
Free plan
Yes
The verdict
Claude or Grammarly?
Section 01
Pricing, plan by plan
Every plan each vendor publishes, monthly and yearly where both are offered.
Claude
Free
Free
Chat on web, iOS, Android, and desktop
Pro
$20 · $200
For everyday productivity
Max
From $100
Get the most out of Claude
Team Standard
$25 · $20
All Claude features, plus more usage than Pro
Team Premium
$125 · $100
5x more usage than standard seats
Enterprise
Custom
Seat price + usage at API rates
Grammarly
Free
$0/mo · $0/yr
Write without mistakes, see writing tone, 100 AI prompts/month
Pro
$30/mo · $144/yr
Full sentence rewrites, tone adjustment, plagiarism/AI detection, 2,000 AI prompts/month, 7-day free trial
Enterprise
Contact Sales
Unlimited members, dedicated support, BYOK encryption, data loss prevention, custom roles, unlimited AI prompts
Section 02
Pros and cons
From each tool's full review, written from the same checked facts.
Claude
Pros
- The 200,000-token context window enables handling of long documents and large codebases, a genuine differentiator over competitors like ChatGPT.
- The Projects feature creates persistent workspaces with organized conversations and uploaded documents, making it feel like a real working environment.
- Constitutional AI training makes Claude less likely to produce harmful or deceptive outputs, which is especially valued by enterprise buyers.
- Claude Code runs in the terminal and handles multi-step coding tasks, earning strong ratings among developers.
- A versatile model family (Opus, Sonnet, Haiku, Fable) lets users balance speed and depth depending on task complexity.
- Users who have tried multiple AI assistants tend to settle on Claude, suggesting strong real-world retention and satisfaction.
- Available across web, iOS, Android, and desktop apps, providing broad accessibility for different workflows.
Cons
- Newer features like Design mode and the Science research tool are less documented and have limited user review coverage.
- The Projects feature is locked behind the Pro plan and above, restricting access for free-tier users.
- Rapid growth has meant the product has only 'mostly' kept pace, implying occasional gaps in polish or stability.
- Competitors like ChatGPT are catching up on context window size, potentially eroding one of Claude's key differentiators.
- Constitutional AI guardrails may limit usefulness in certain edge-case or boundary-pushing use cases.
- User reviews and documentation are still catching up with the newer agentic and collaborative tools like Cowork.
Grammarly
Pros
- Grammarly works across an impressive range of platforms including Chrome, Safari, Firefox, Edge, Windows, Mac, iOS, Android, Microsoft Word, and Google Docs.
- The plagiarism checker is built directly into the editor rather than being a separate export tool, a useful workflow for academic and content marketing use.
- Real-time grammar, spelling, and punctuation corrections remain reliable and are available even on the free plan.
- The Pro plan at $12/month billed annually unlocks full sentence rewrites, tone suggestions, and style clarity options at a competitive price point.
- Tone detection and brand voice features make it viable for enterprise teams managing content consistency across large organizations.
- Grammarly says it works across more than 500,000 apps and websites, making it one of the most broadly compatible writing tools.
Cons
- The free plan is significantly limited, though it does include tone detection and 100 AI prompts a month alongside basic grammar, spelling, and punctuation; most meaningful features still require a paid Pro subscription.
- Grammarly is now owned by Superhuman, which adds uncertainty about the product's long-term direction.
- Brand voice customization is heavily gated, with free users restricted to a single brand tone while unlimited options require an enterprise plan.
Side by side
| Company | ||
| Founded | 2021 | 2009 |
| HQ | San Francisco, USA | San Francisco, USA |
| AI model | Claude (Fable, Opus, Sonnet, Haiku — Proprietary by Anthropic) | Proprietary |
| User base | Millions+ (exact not publicly stated) | 40 million+ |
| Platforms | Web, iOS, Android, Desktop | Web, Windows, Mac, iOS, Android, Chrome, Safari, Firefox, Edge, MS Office, Google Docs |
| Languages | 25+ | English primary, with fluency support for non-native English speakers |
| Pricing | ||
| Pricing model | Freemium | Freemium |
| Free plan | Yes | Yes |
| Free trial | No | Yes — 7-day free trial for Pro |
| Starting price | $0/mo | $12/mo (Pro plan, billed annually) |
| Enterprise | Custom pricing — contact sales | Custom |
| All plans | Free — Free Pro — $20 Max — From $100 Team Standard — $25 Team Premium — $125 Enterprise — Custom usage | Free — $0/mo Pro — $30/mo Enterprise — Contact Sales |
| Positioning | ||
| Best for | Individuals, developers, teams, and enterprises needing advanced AI assistance for writing, coding, research, and complex reasoning | Individuals, teams, and enterprises seeking AI-powered writing assistance, grammar checking, and tone improvement |
| Differentiator | Claude combines Constitutional AI safety training with powerful reasoning, massive context windows, and a growing suite of agentic tools (Claude Code, Cowork, Design, Science) all under one platform built by Anthropic. | The most widely adopted AI writing assistant, trusted by 40 million users and 50,000 organizations, offering real-time grammar, tone, plagiarism, and AI detection with enterprise-grade security and style guide enforcement. |
| Competitors | ChatGPT, Gemini, Copilot, Perplexity | Hemingway Editor, ProWritingAid, QuillBot, Jasper, Copy.ai, Writer |
| Features | ||
| Claude Code | ✓ | — |
| Claude Cowork | ✓ | — |
| Claude Design | ✓ | — |
| Claude Science | ✓ | — |
| Microsoft 365 Integration | ✓ | — |
| Remote Mcp Connectors | ✓ | — |
| AI Assistant | ✓ | — |
| AI Copywriting | — | ✓ |
| AI Research | — | ✕ |
| Brand Voice | — | Deep — brand tones (1 on Free, unlimited on Enterprise), style guide, knowledge share, snippets |
| Browser Extension | ✓ | — |
| Bulk Generation | — | ✕ |
| Calendar Integration | ✓ | — |
| Content Editor | — | ✓ |
| Document Creation | ✓ | — |
| Email Management | ✓ | — |
| Grammar Style | — | ✓ |
| Image Generation | — | ✕ |
| Long Form Writing | — | ✓ |
| Meeting Summary | ✓ | — |
| Mobile App | ✓ | — |
| Note Taking | ✓ | — |
| Offline Mode | ✕ | — |
| Paraphrasing | — | ✓ |
| Plagiarism Checker | — | Built-in — available on Pro and Enterprise plans |
| Project Management | ✓ | — |
| Research Assistant | ✓ | — |
| SEO Optimization | — | ✕ |
| Short Form Writing | — | ✓ |
| Spreadsheet AI | ✓ | — |
| Task Automation | ✓ | — |
| Team Collaboration | ✓ | — |
| Templates | — | ✕ |
| Integrations | ||
| API Access | ✓ | ✓ |
| Browser Extension | ✓ | — |
| Chrome Extension | — | ✓ |
| Google Calendar | ✓ | — |
| Google Docs | — | ✓ |
| Google Drive | ✓ | — |
| Key Integrations | Google Workspace, Slack, Microsoft 365, Microsoft Outlook, Microsoft Excel, AWS, Google Cloud Vertex AI, Microsoft Azure Foundry, remote MCP connectors | Google Docs, Microsoft Office (Word), Chrome, Safari, Firefox, Edge, Windows desktop app, Mac desktop app, iPhone, iPad, Android, Zendesk (shown in marketing) |
| Microsoft 365 | ✓ | — |
| Slack Integration | ✓ | — |
| Wordpress | — | ✕ |
Section 03
Claude vs Grammarly: common questions
Is Claude or Grammarly cheaper?
Claude's cheapest paid plan is $0/mo and Grammarly's is $12/mo (Pro plan, billed annually). Compare what each plan includes below before going on price alone.
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