VS
Head-to-Head Comparison
Copy.ai vs Grammarly
An honest, side-by-side breakdown of pricing, features, and security — so you can pick the right tool.
Published Last updated
- Grammarly is cheaper to start — £10/mo versus £23/mo for Copy.ai.
- On privacy, Copy.ai offers GDPR compliance where Grammarly does not.
- Copy.ai is best for teams building AI writing into their products; Grammarly for teams building AI writing into their products.
Copy.ai
AI Writing
7.6/ 10
£23/mo · Paid only
Best for teams building AI writing into their products
Visit Copy.aiSee all AI Writing Tools →G
Grammarly
AI Writing
8.1/ 10
Free · Free tier
Best for teams building AI writing into their products
Visit GrammarlySee all AI Writing Tools →Some “Visit” links are affiliate links. How we earn →
Feature comparison
| Feature | Copy.ai | Grammarly |
|---|---|---|
| CompareMyAI score | 7.6 / 10 | 8.1 / 10 |
| Free tier | ||
| API access | ||
| Open source | ||
| Enterprise ready | ||
| GDPR compliant | ||
| Vendor holds SOC 2 | ||
| Vendor holds ISO 27001 | ||
| MFA supported | ||
| Trains on your data | Yes |
Certifications may only cover business or enterprise plans. Check the vendor’s trust page for your plan.
Grammarly comes out ahead — and you can try it free.
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Pricing
Price checked with vendor on
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Always check the provider's site for the latest pricing.
Pros & cons
Copy.ai
Pros
- +Good range of marketing templates
- +Generous free tier
- +Easy to use
- +Strong for short-form copy like ads and social posts
Cons
- −Output quality inconsistent on longer content
- −Less powerful than general LLMs for complex writing
- −Brand voice features limited on lower tiers
Grammarly
Pros
- +SOC 2 Type II and ISO 27001 certified — strongest compliance in the writing category
- +Works across browser, desktop, Word, Google Docs, and email with one install
- +Pro tier confirmed at £10/mo in GBP — transparent UK pricing
- +Explicit opt-out from AI model training available in account settings
Cons
- −Trains on user writing by default — opt-out required
- −GDPR compliance not explicitly confirmed on accessed official pages
- −Free AI prompt limit (100/mo) may feel restrictive for daily users
Our take— Grammarly wins
Based on our comparison of published pricing, features, and compliance data, Grammarly scores 8.1/10 to Copy.ai's 7.6/10. Grammarly pulls ahead with a free tier. Copy.ai counters with GDPR compliance. Pick Grammarly if you need a free tier; pick Copy.ai if GDPR compliance matters.
Frequently asked questions
Which is cheaper, Copy.ai or Grammarly?
Grammarly is cheaper to start, with its lowest paid plan at £10/mo versus £23/mo for Copy.ai. These are each vendor's published prices and can change, so check before you buy.
Does Copy.ai train on your data?
Based on published vendor information, Copy.ai does not train its models on your data. Policies can differ by plan and change over time, so it is worth confirming the current terms on the vendor's site.
Does Grammarly train on your data?
Based on published vendor information, Grammarly may use your data to help train its models. Training is sometimes opt-out, or switched off on paid and business plans, so review the privacy settings in your account.
Are Copy.ai and Grammarly GDPR compliant?
Copy.ai states it is GDPR compliant, while Grammarly is not recorded as GDPR compliant in our data. Confirm the current position with each vendor if GDPR compliance is important for your use.
Do Copy.ai and Grammarly have a free tier?
Grammarly offers a free tier, while Copy.ai is paid only. If you want to try before paying, Grammarly is the one to start with.