VS
Head-to-Head Comparison
Claude vs Grammarly
An honest, side-by-side breakdown of pricing, features, and security — so you can pick the right tool.
Published Last updated
- Claude starts at US$20/mo and Grammarly at £10/mo — published in different currencies, so not a like-for-like figure.
- On privacy, Claude offers GDPR compliance where Grammarly does not.
- Claude is best for teams building AI chat into their products; Grammarly for teams building AI writing into their products.
Claude
AI Chatbot
8.9/ 10
Free · Free tier
Best for teams building AI chat into their products
Visit ClaudeSee all AI Chatbots →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 | Claude | Grammarly |
|---|---|---|
| CompareMyAI score | 8.9 / 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.
Claude comes out ahead — and you can try it free.
Try Claude freeAffiliate link · how we earn
Pricing
Price checked with vendor on
FreeFree
ProUS$20/mo ≈£15.03/mo
MaxUS$100/mo ≈£75.15/mo
TeamUS$25/mo ≈£18.79/mo
Team PremiumUS$125/mo ≈£93.94/mo
EnterpriseContact sales
G
Always check the provider's site for the latest pricing.
Pros & cons
Claude
Pros
- +Excellent at long-form writing and nuanced reasoning
- +Strong privacy stance with no data training on free tier
- +200K context window handles large documents
- +GDPR compliant and SOC2 certified
Cons
- −No image generation
- −Smaller plugin ecosystem than ChatGPT
- −Free tier has usage limits
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— Claude wins
Based on our comparison of published pricing, features, and compliance data, Claude scores 8.9/10 to Grammarly's 8.1/10. Claude pulls ahead with GDPR compliance and a no-training-on-your-data policy. Grammarly stays close but doesn't lead on any single attribute here. If GDPR compliance matters, go Claude; if it doesn't, Grammarly.
Frequently asked questions
Does Claude train on your data?
Based on published vendor information, Claude 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 Claude and Grammarly GDPR compliant?
Claude 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 Claude and Grammarly have a free tier?
Yes — both Claude and Grammarly offer a free tier, so you can try each one before committing to a paid plan. Free tiers usually come with usage limits.
Which has an API, Claude or Grammarly?
Both Claude and Grammarly offer API access, so developers can build either into their own products and workflows.