Copy.ai vs Grammarly (2026): Which AI Tool Is Better?

Both are popular AI writing assistants. Here is how Copy.ai and Grammarly stack up on price, strengths and weaknesses, and which one we would pick.

Copy.ai

GTM AI platform with multi-model chat, brand voice and content workflows

6.5 /10

Pricing: Paid from $29/mo

Pros

Chat plan gives 5 seats and unlimited words with OpenAI, Anthropic and Gemini models
Brand Voice and Infobase keep content consistent
Workflows automate repeatable content and sales tasks
2,000+ integrations (Salesforce, HubSpot, Zapier)

Cons

Pivoted from a writing tool to a sales and marketing (GTM) platform
No free plan any more
Workflow plans jump from $29 to $1,000 per month
API access only on Enterprise

Visit Copy.ai ↗

Grammarly

Writing assistant for grammar, tone and rewrites across 1 million+ apps

8.1 /10

Pricing: Free plan, paid from $30/mo

Pros

Works inside Google Docs, Word, Gmail, Outlook, Slack and 1 million+ apps and sites
Free grammar and spelling checks plus 100 AI prompts a month
Pro adds plagiarism and AI-text detection, AI Grader and rewrites
Real-time support in 20+ languages

Cons

Pro costs $30 monthly; the $12 price needs annual billing
Free plan is mostly grammar and spelling
Includes an AI Humanizer, which some schools and clients treat with suspicion
Now part of Superhuman; enterprise sales go through Superhuman Go

Visit Grammarly ↗

Copy.ai vs Grammarly at a glance

	Copy.ai	Grammarly
Editor score	6.5 / 10	8.1 / 10
Pricing model	Paid	Freemium
Starting price	$29/mo	$30/mo
Reader upvotes	0	0
Best for	copywriting, gtm, workflows	grammar, editing, tone
Model choice	Yes	No
Commercial use	No	No
No watermark (free)	No	No
API	Yes	No
Official MCP server	No	No
MCP client	No	No
Agent Skills	No	No
Brand kit	Yes	No
Teams	Yes	Yes
Content Credentials	No	No
Mobile app	No	No
20+ languages	No	Yes
Makes	Ad & marketing copy, Emails & newsletters, Blog posts & articles, Social media posts	Emails & newsletters, Blog posts & articles, Ad & marketing copy, Social media posts
AI models inside	3	0

Our pick

Grammarly edges it with a score of 8.1 versus 6.5. Grammarly is the better fit if you value: works inside google docs, word, gmail, outlook, slack and 1 million+ apps and sites, free grammar and spelling checks plus 100 ai prompts a month. Choose Copy.ai instead if you need: chat plan gives 5 seats and unlimited words with openai, anthropic and gemini models, brand voice and infobase keep content consistent.