# Grammarly vs Notion AI

> Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app
> Notion AI: AI agent and writing assistant built into the Notion workspace for docs and databases

- Grammarly profile: https://finderatlas.com/tools/grammarly
- Notion AI profile: https://finderatlas.com/tools/notion-ai
- Comparison page: https://finderatlas.com/compare/grammarly-vs-notion-ai
- Last reviewed: October 2026

## Verdict

Grammarly and Notion AI are both AI Assistants tools. Notion AI scores higher in FinderAtlas's editorial review (8.5 vs 8.2 out of 10). Both have a free plan or trial. Only Grammarly is available on Chrome Extension and Firefox Extension and offers an API.

### Choose Grammarly if

- You want a tool built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team.
- Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
- Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.

### Choose Notion AI if

- You want a tool built for searching and answering questions across a Notion workspace.
- Works directly on the pages and databases where teams already keep their content.
- Q&A answers include citations to workspace sources.

## Pricing

| | Grammarly | Notion AI |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Grammarly | Notion AI |
| --- | --- | --- |
| Citation Tools | Yes | Not listed |
| Style Guides and Brand Tones | Yes | Not listed |
| Cross-App Availability | Yes | Not listed |
| Enterprise Security Controls | Yes | Not listed |
| Grammar and Mistake Correction | Yes | Not listed |
| Tone Detection and Adjustment | Yes | Not listed |
| Full-Sentence and Paragraph Rewrites | Yes | Not listed |
| AI Detector and Humanizer | Yes | Not listed |
| Plagiarism Checker | Yes | Not listed |
| Notion Agent | Not listed | Yes |
| Custom Agents | Not listed | Yes |
| Q&A with citations | Not listed | Yes |
| Inline writing help | Not listed | Yes |
| AI Meeting Notes (beta) | Not listed | Yes |
| Enterprise Search (beta) | Not listed | Yes |
| Research mode | Not listed | Yes |
| Database autofill and formulas | Not listed | Yes |
| Admin controls | Not listed | Yes |

## Platforms

| Platform | Grammarly | Notion AI |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | No |
| Browser Extension | No | No |
| Chrome Extension | Yes | No |
| Firefox Extension | Yes | No |

## Grammarly strengths

- Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
- Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
- Pro adds tone adjustment, full-sentence rewrites, plagiarism and AI-text detection in a single subscription.
- Team features include style guides, brand tones, analytics and user groups; Enterprise adds SSO, SCIM and audit logs.
- Public REST APIs exist for analytics, licence management, writing score and detection.

## Grammarly limitations

- Monthly billing for Pro is $30, versus $12 per month on annual billing, so month-to-month use costs 2.5 times as much.
- Third-party tests of the AI Detector report notable false-positive rates (figures range from 14.2% to 34% across sources), so it is unreliable as proof.
- An App Store reviewer criticizes the iOS keyboard setup for pushing users to grant broad access.
- Experienced writers on forums report turning off many suggestions; advanced features are gated behind Pro.

## Notion AI strengths

- Works directly on the pages and databases where teams already keep their content
- Q&A answers include citations to workspace sources
- Enterprise Search reaches connected apps such as Slack, Google Drive and GitHub
- Meeting transcription works without a meeting bot
- Notion states customer data is not used for model training unless the customer opts in

## Notion AI limitations

- Full AI features (Agent, Meeting Notes, Enterprise Search) require the $20 per member Business plan
- Custom Agents and Workers use credits billed at $10 per 1,000 monthly credits
- Meeting Notes and Enterprise Search are labelled beta
- Only useful if content lives in Notion; it does not generate images

## FAQ

**Is Grammarly better than Notion AI?**

It depends on your workflow. Grammarly is built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team. Notion AI is built for searching and answering questions across a Notion workspace.

**What are the key feature differences between Grammarly and Notion AI?**

Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. Notion AI: AI agent and writing assistant built into the Notion workspace for docs and databases.

**Does Grammarly or Notion AI have a free plan?**

Yes, both do. Grammarly is freemium and Notion AI is freemium, and each has a free plan or trial.

**Which is cheaper, Grammarly or Notion AI?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.