Grammarly vs Notion AI (2026): Which AI Tool Is Better?

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

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 ↗

Notion AI

AI agent and writer inside Notion docs, wikis and databases

7.7 /10

Pricing: Free plan, paid from $20/mo

Pros

Writes and edits directly in your Notion docs and databases
Model choice including GPT, Claude, Gemini and Grok
Notion Agent runs multi-step tasks; Custom Agents automate recurring ones
Team skills library that can export to SKILL.md for other agents
Notion MCP server connects other AI tools to your workspace

Cons

Full Notion AI requires the Business plan ($20/member annually)
Free and Plus get only a limited AI trial
Premium models and Custom Agents spend extra Notion credits
Only useful if your content lives in Notion

Visit Notion AI ↗

Grammarly vs Notion AI at a glance

	Grammarly	Notion AI
Editor score	8.1 / 10	7.7 / 10
Pricing model	Freemium	Freemium
Starting price	$30/mo	$20/mo
Reader upvotes	0	0
Best for	grammar, editing, tone	workspace, notes, agents
Model choice	No	Yes
Commercial use	No	No
No watermark (free)	No	No
API	No	No
Official MCP server	No	Yes
MCP client	No	No
Agent Skills	No	No
Brand kit	No	No
Teams	Yes	Yes
Content Credentials	No	No
Mobile app	No	Yes
20+ languages	Yes	No
Makes	Emails & newsletters, Blog posts & articles, Ad & marketing copy, Social media posts	Blog posts & articles, Emails & newsletters, Scripts & outlines, Social media posts
AI models inside	0	4

Our pick

Grammarly edges it with a score of 8.1 versus 7.7. 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 Notion AI instead if you need: writes and edits directly in your notion docs and databases, model choice including gpt, claude, gemini and grok.