Comparison
Copy.aivsGrammarly
Copy.ai and Grammarly are both popular ai writing tools, but they take different approaches. Copy.ai offers a free plan and positions itself as "your unfair advantage for go-to-market". Grammarly offers a free plan and bills itself as "write your best with grammarly". Here's how they compare across features, pricing, and real-world strengths.
Feature Comparison
| Feature | Copy.ai | Grammarly |
|---|---|---|
| API access | ✓ | ✓ |
| Brand voice | ✓ | ✓ |
| Browser extension | ✗ | ✓ |
| Free plan | ✓ | ✓ |
| Long-form content | ✓ | ✗ |
| Multi-language | ✓ | ✗ |
| Plagiarism checker | ✗ | ✓ |
| SEO optimization | ✗ | ✗ |
| Short-form copy | ✓ | ✗ |
| Team collaboration | ✓ | ✓ |
| Templates | ✓ | ✗ |
| Tone adjustment | ✓ | ✓ |
Copy.ai Pricing
Chat
5 seats, unlimited chat words, no workflows
$29.00/mo
Growth
75 seats, 20K workflow credits/mo
$1000.00/mo
Expansion
150 seats, 45K workflow credits/mo
$2000.00/mo
Scale
200 seats, 75K workflow credits/mo
$3000.00/mo
Enterprise
Custom
Custom
Grammarly Pricing
Free
100 AI prompts/month, basic grammar/spelling/punctuation checks, no plagiarism detection or advanced rewrites
Free
Pro
2,000 AI prompts/member/month, up to 149 seats, full-sentence rewrites, plagiarism detection, tone adjustment (Priority support)
$30.00/mo
Enterprise
Unlimited AI prompts, enterprise security (SSO, SCIM, DLP), team analytics, style guides, brand tones, dedicated support (custom pricing, contact sales)
Custom
Copy.ai
Pros
- Easy intuitive interface with templates for quick drafts
- High-quality short-form copy saving time on ads/emails
- 5 seats included in entry-level plan
- Multi-model flexibility outperforms single-model tools
- Strong workflow automation for sales/marketing teams
Cons
- Large pricing gap: $29 Chat to $1000 Growth, no mid-tier
- Requires heavy editing and fact-checking for long-form
- Occasional hallucinations or awkward outputs
- Workflow credits paid separately on top of subscription
- Some reports of poor customer support response
Grammarly
Pros
- Instant grammar and spelling corrections save time on proofreading
- Improves clarity, tone, and professionalism in business communication
- Seamless integrations with Google Docs, Slack, email clients, and more
- Brand voice and style guide features ensure team consistency
- High accuracy in suggestions with explanations for learning
Cons
- Suggestions can be overly strict or change intended tone/voice
- Expensive for small teams or individuals compared to free version
- Occasional incorrect or irrelevant corrections, especially in creative/casual writing
- Performance lag with very long documents or multiple tabs
- Aggressive upgrade prompts and limited free tier features
The Verdict
Grammarly takes this one with a DuelStack Score of 6.8/10 vs 6.4/10. It particularly excels at instant grammar and spelling corrections save time on proofreading. That said, Copy.ai is the better pick if you need easy intuitive interface with templates for quick drafts. Copy.ai also wins on price (from $29/mo), so consider it if budget is the priority.