What is the difference between Grammarly and Notion AI?

Grammarly is best for Anyone wanting AI-powered writing improvement, while Notion AI is best for Notion users wanting AI writing assistance in their workspace. Grammarly starts at Free and Notion AI starts at $10/user/mo.

Is Grammarly or Notion AI cheaper?

Grammarly starts at Free with a free tier. Notion AI starts at $10/user/mo.

Is there a free alternative to Notion AI?

Yes, Grammarly offers a free tier (Free basic grammar checks).

Grammarly vs Notion AI

Grammarly is AI writing assistant for grammar, clarity, tone, and style across every platform, while Notion AI is AI assistant built into Notion for writing, summarizing, and brainstorming. The biggest difference up front: Grammarly is free, while Notion AI starts at $10/user/mo. Grammarly is built for anyone wanting ai-powered writing improvement, whereas Notion AI targets notion users wanting ai writing assistance in their workspace.

At a glance

	Grammarly	Notion AI
Best for	Anyone wanting AI-powered writing improvement	Notion users wanting AI writing assistance in their workspace
Starting price	Free	$10/user/mo
Free tier	✓	—
Open source	—	—
Free tier available	✓	—
Open source	—	—
Brainstorm	—	✓
Clarity	✓	—
Grammar	✓	—
Plagiarism	✓	—
Summarize	—	✓
Tone	✓	—
Translate	—	✓
Write	—	✓

Grammarly

Strengths

Includes Grammar as a core feature, purpose-built for ai writing workflows
Includes Clarity as a core feature, purpose-built for ai writing workflows
Free basic grammar checks — generous enough for most small teams to get real work done
Established product with 17+ years on the market and a mature ecosystem

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in ai writing
Mobile experience lags behind the desktop version in features and polish

Try Grammarly → Full review

Notion AI

Strengths

Includes Summarize as a core feature, purpose-built for ai writing workflows
Includes Write as a core feature, purpose-built for ai writing workflows
Pricing starts at $10/user/mo, which includes the full ai writing feature set
Includes translate alongside the core feature set — fewer separate tools needed

Weaknesses

No free plan — you need to pay $10/user/mo from day one to use it
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in ai writing
Relatively new (founded 2023) — the feature set and integrations are still maturing

Try Notion AI → Full review

The bottom line

Pricing: Grammarly is completely free (Free basic grammar checks), which makes it the obvious pick if budget is the top concern. Notion AI starts at $10/user/mo. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: Grammarly offers Clarity, Grammar and Plagiarism that Notion AI lacks. Notion AI brings Brainstorm, Summarize and Translate that Grammarly does not have.

Team fit: Both tools target any size teams, so the decision hinges on features and workflow fit rather than scale.

Where each tool shines: Grammarly's biggest strengths are: includes grammar as a core feature, purpose-built for ai writing workflows. includes clarity as a core feature, purpose-built for ai writing workflows. Notion AI's biggest strengths are: includes summarize as a core feature, purpose-built for ai writing workflows. includes write as a core feature, purpose-built for ai writing workflows.

Watch out for: With Grammarly, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Notion AI, the main complaint is that no free plan — you need to pay $10/user/mo from day one to use it.

Choose Grammarly if...

You need a tool built for anyone wanting ai-powered writing improvement
Budget is a hard constraint — Grammarly is free, Notion AI is not
You specifically need Clarity and Grammar
You care about includes clarity as a core feature, purpose-built for ai writing workflows
The free tier works for you: free basic grammar checks

Choose Notion AI if...

You need a tool built for notion users wanting ai writing assistance in their workspace
You specifically need Brainstorm and Summarize
You care about includes write as a core feature, purpose-built for ai writing workflows