# Grammarly

> AI writing assistant that corrects, rewrites and tone-checks your text across every app

- Category: [AI Assistants](https://finderatlas.com/categories/ai-assistants)
- Pricing: Freemium
- Website: https://www.grammarly.com
- Platforms: Web, macOS, Windows, iOS, Android, Chrome Extension, Firefox Extension, API
- API: available
- Mobile app: available
- Made by: Superhuman, founded 2009, San Francisco, CA
- Last updated: 2026-10-19
- FinderAtlas page: https://finderatlas.com/tools/grammarly

## Overview

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, clarity and tone as you write, and suggests rewrites at the word, sentence and paragraph level. It runs as a desktop app for Windows and Mac, as browser extensions for Chrome, Safari, Firefox and Edge, inside Microsoft Office and Google Docs, and as a keyboard on iPhone, iPad and Android, so the same suggestions follow the user across email, documents and messaging apps. The company states it is trusted by 40 million people and 50,000 organizations.

## Key features

- Citation Tools
- Style Guides and Brand Tones
- Cross-App Availability
- Enterprise Security Controls
- Grammar and Mistake Correction
- Tone Detection and Adjustment
- Full-Sentence and Paragraph Rewrites
- AI Detector and Humanizer
- Plagiarism Checker

## Pricing

- **Free** ($0): Basic writing help for individuals
- **Pro** ($30/month): Individuals and eligible teams wanting advanced rewrites and detection
- **Enterprise** (Custom): Larger organizations with security and governance needs

## Best for

- Polishing emails and documents in real time across many apps, keeping tone and style consistent across a team

## Who uses it

- Students
- Professionals
- Non-native English Writers
- Marketing Teams
- Enterprise Communications Teams

## 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.

## 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.

## Not recommended for

- Creative writers who want minimal intervention, anyone needing a verdict-grade AI-content detector

## Integrations

- Microsoft Office
- Google Docs
- Chrome
- Safari
- Firefox
- Edge
- Zendesk

## FinderAtlas editorial scores (out of 10)

- Ease of Use: 9.1/10
- Feature Depth: 8.3/10
- Value for Money: 7.3/10
- Performance & Speed: 8.4/10
- Documentation & Support: 8/10

## Alternatives

- [Fyxer AI](https://finderatlas.com/tools/fyxer-ai): AI assistant that organizes your inbox, drafts replies and takes meeting notes ([compare](https://finderatlas.com/compare/fyxer-ai-vs-grammarly))
- [Zapier](https://finderatlas.com/tools/zapier): Connect AI models and 9,000+ business apps into automated workflows and agents ([compare](https://finderatlas.com/compare/grammarly-vs-zapier))
- [Motion](https://finderatlas.com/tools/motion): AI work platform that plans your day, manages projects and automates tasks ([compare](https://finderatlas.com/compare/grammarly-vs-motion))
- [Shortwave](https://finderatlas.com/tools/shortwave): AI email client for Gmail that searches, organizes, drafts and schedules from plain-language prompts ([compare](https://finderatlas.com/compare/grammarly-vs-shortwave))
- [Notion AI](https://finderatlas.com/tools/notion-ai): AI agent and writing assistant built into the Notion workspace for docs and databases ([compare](https://finderatlas.com/compare/grammarly-vs-notion-ai))
- [Fireflies.ai](https://finderatlas.com/tools/fireflies): AI notetaker that records, transcribes and summarizes your meetings across every major call platform ([compare](https://finderatlas.com/compare/fireflies-vs-grammarly))
- [Jamie](https://finderatlas.com/tools/jamie): Bot-free AI meeting notes, action items and CRM follow-ups with EU data hosting ([compare](https://finderatlas.com/compare/grammarly-vs-jamie))
- [Circleback](https://finderatlas.com/tools/circleback): AI meeting notes, action items and automations that work with or without a bot ([compare](https://finderatlas.com/compare/circleback-vs-grammarly))

## Recent updates

- 2026-02-01: Company reportedly acquired spreadsheet startup Rows (third-party report)
- 2025-10-01: Parent company renamed Superhuman after acquiring Coda and Superhuman Mail; Grammarly remains the writing product brand

## FAQ

**Is Grammarly free?**

Yes. The Free plan costs $0 and includes basic mistake correction, tone visibility and 100 AI prompts per month. Advanced rewrites, plagiarism detection and AI detection require Pro.

**How much does Grammarly Pro cost?**

The homepage lists Pro at $12 per member per month billed annually or $30 per month billed monthly, with 2,000 AI prompts per member per month. A trial is offered to eligible users.

**Which devices and apps does Grammarly work with?**

Windows and Mac desktop apps, Chrome, Safari, Firefox and Edge extensions, Microsoft Office, Google Docs, and a keyboard for iPhone, iPad and Android.

**Does Grammarly use my writing to train AI models?**

The company states user content is not sold, used for advertising or used to train third-party models. Review the privacy policy and Trust Center for specifics.

**What happened to Grammarly and Superhuman?**

In October 2025 the company renamed itself Superhuman after acquiring Coda and Superhuman Mail. Grammarly continues as a product within that brand.

**Can Grammarly's AI detector prove text was written by AI?**

No. Grammarly itself advises it should not be the sole basis for such a decision, and third-party tests report mixed accuracy and false positives.