Decision Support · Side-by-side
Compare pricing, strengths, and use cases so it is easier to pick the right fit.
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Grammarly AI (GrammarlyGO)
Best overallGrammarly AI is the clear winner for most people: it's a polished, full-featured writing assistant that works everywhere you type, with a generous free tier and proven reliability. Mailr is a niche email-focused tool that's currently unavailable for purchase (the domain is for sale), so it's not a practical choice right now. The single biggest difference is that Grammarly is ready to use today, while Mailr is effectively off the market.
Grammarly AI (GrammarlyGO)
Mailr
Scores at a glance
Choose Grammarly AI (GrammarlyGO) if
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Key differences
Facts side by side
| Grammarly AI (GrammarlyGO) | Mailr | |
|---|---|---|
| Free plan | ||
| Mobile app | ||
| API access |
Common questions
Yes, Grammarly is better for emails because it actually works today, integrates with Gmail and Outlook, and offers tone suggestions, rewrites, and proofreading for free. Mailr no longer exists as a working product.
Grammarly doesn't have a standalone mobile app, but you can use it on your phone by installing the Grammarly keyboard (iOS/Android) or using Grammarly in your mobile browser. It's not as seamless as the desktop experience, but it works.
Mailr used to have a free tier with a low word count, but the tool is no longer available. The domain mailr.ai is now for sale, so you cannot sign up or use the service.
Grammarly is excellent for non-native speakers because it catches grammar errors, suggests clearer phrasing, and adjusts tone. Mailr is not an option since it's discontinued.
Yes, Grammarly has an official add-in for Google Docs that provides real-time suggestions, tone detection, and rewriting. It's one of its most popular integrations.
Mailr could summarize threads when it was active, but since the product is no longer available, you cannot use this feature. Grammarly's generative AI can also summarize email threads if you use it in Gmail or Outlook.
Grammarly AI is the only real choice here: it's free, works everywhere, and is actively supported — Mailr is essentially a dead product with its domain up for sale.
For almost anyone who writes on a computer — whether it's emails, school papers, or work reports — Grammarly's free tier is a no-brainer. It's easy to set up, works everywhere, and won't cost you a dime unless you want advanced features. Mailr was a promising email tool, but it's no longer available, so don't waste time looking for it. Stick with Grammarly.
Detail pages: Grammarly AI (GrammarlyGO) · Mailr
