Grammarly AI vs Notion AI (Writing)
A detailed comparison to help you choose between Grammarly AI and Notion AI (Writing).
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Verdict: Grammarly AI wins
Grammarly AI scores 4.3/5, edging out Notion AI (Writing) at 4.0/5. Professionals and students who want one assistant that improves everything they type, everywhere they type it.
Grammarly AI AI writing assistant trusted by millions | Notion AI (Writing) AI writing assistant inside your Notion workspace | |
|---|---|---|
| Rating | 4.3 (1 review) | 4.0 (1 review) |
| Pricing Model | freemium | paid |
| Starting Price | Free tier available | From $10/mo |
| Best For | Professionals and students who want one assistant that improves everything they type, everywhere they type it. | Teams whose docs, projects and databases already live in Notion and who want AI drafting, search and meeting notes grounded in that workspace at the Business tier. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierbrowser extensionteam features | team features |
| Visit Grammarly AI → | Visit Notion AI (Writing) → |
Grammarly AI
Pros
- + The correction engine caught every mechanical error in my corrupted test sample, and Pro's sentence rewrites fixed wordy-but-not-wrong prose
- + Works in webmail, document editors and support forms with zero setup — corrections follow you across every text field
- + Tone detector gave a useful second opinion before sending sensitive messages in my testing
- + Team layer (style guide, brand tones, analytics) is mature enough for real organisational enforcement
- + Enterprise governance is real: SAML SSO, SCIM, DLP, BYOK, audit-log API, and a published SOC 2 (Type 2) attestation
Cons
- - Long-form generation is filler-level without heavy steering; there is no manuscript or article drafting workflow
- - Free tier's 100 AI prompts/month runs out fast if rewrites are part of every message; full-sentence rewrites are Pro-only
- - Per-member pricing scales steeply — ten seats at $12/member/month annually is $1,440/year before Enterprise
- - AI-text and plagiarism detectors are probabilistic signals, not verdicts; risky as academic evidence
- - Everything typed through the extension is processed by a third party, and the Superhuman-era corporate changes may reshape the product
Notion AI (Writing)
Pros
- + Workspace grounding is the real feature — summaries and answers cited my own sub-pages and database rows accurately in testing
- + AI lives where the work happens: no copy-paste round trips through a chat window, formatting preserved
- + Data handling is documented: no training on customer data without opt-in, subprocessors contractually barred (notion.com/pricing FAQ)
- + Business bundle at $20/member/month annual is close to the old Plus+add-on spend and adds SSO, private teamspaces, 90-day history
- + AI Meeting Notes, AI search and multi-step Notion Agent cover the full loop from capture to draft to action
Cons
- - The $10 AI add-on was retired in May 2025 — AI access now requires Business at $20/member/month minimum for new sign-ups
- - Prose quality trails specialist writing assistants; drafts over-organize into bulleted lists and tone controls move the register less
- - Free and Plus get only a limited allocation of complimentary AI responses that stops mid-workflow when exhausted
- - Custom Agents meter on credits ($10 per 1,000, no rollover, since May 4, 2026) — automation-heavy use is hard to forecast
- - Outside Notion the product has no value; grounded answers wobble in messy, unmaintained workspaces
Frequently Asked Questions
Which is better, Grammarly AI or Notion AI (Writing)?▼
Grammarly AI scores higher at 4.3/5 vs 4.0/5 for Notion AI (Writing), making it the better-rated option in our comparison.
What is the difference between Grammarly AI and Notion AI (Writing)?▼
Grammarly AI: Writing assistant that checks grammar, spelling and tone in your browser, email and docs, with AI rewrites. Free plan; Pro adds full-sentence rewrites and plagiarism checks. Notion AI (Writing): Notion's AI layer that drafts documents, summarizes pages, improves writing, and answers questions about your workspace.
Is Grammarly AI or Notion AI (Writing) more affordable?▼
Grammarly AI starts at €0/mo, Notion AI (Writing) starts at €10/mo. Check the comparison table above for current pricing.
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