# ChatGPT vs Grammarly

> ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat
> Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app

- ChatGPT profile: https://finderatlas.com/tools/chatgpt
- Grammarly profile: https://finderatlas.com/tools/grammarly
- Comparison page: https://finderatlas.com/compare/chatgpt-vs-grammarly
- Last reviewed: October 2026

## Verdict

ChatGPT and Grammarly are both AI Assistants tools. ChatGPT scores higher in FinderAtlas's editorial review (8.9 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 ChatGPT if

- You want a tool built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant.
- One assistant covers text, voice, images, file analysis, search and coding.
- Free tier lets users try the service without a card.

### 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.

## Pricing

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

## Features

| Feature | ChatGPT | Grammarly |
| --- | --- | --- |
| Chat with web search | Yes | Not listed |
| Voice mode | Yes | Not listed |
| Image generation | Yes | Not listed |
| File and image analysis | Yes | Not listed |
| Projects | Yes | Not listed |
| ChatGPT agent | Yes | Not listed |
| Codex | Yes | Not listed |
| Connectors and apps | Yes | Not listed |
| Citation Tools | Not listed | Yes |
| Style Guides and Brand Tones | Not listed | Yes |
| Cross-App Availability | Not listed | Yes |
| Enterprise Security Controls | Not listed | Yes |
| Grammar and Mistake Correction | Not listed | Yes |
| Tone Detection and Adjustment | Not listed | Yes |
| Full-Sentence and Paragraph Rewrites | Not listed | Yes |
| AI Detector and Humanizer | Not listed | Yes |
| Plagiarism Checker | Not listed | Yes |

## Platforms

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

## ChatGPT strengths

- One assistant covers text, voice, images, file analysis, search and coding
- Free tier lets users try the service without a card
- Apps for web, iOS, Android, macOS and Windows with synced history
- Large ecosystem of connectors, projects and agent features
- Plans range from $8 to $500 per month, so users can match spend to usage

## ChatGPT limitations

- Free and Go usage limits are low and may include ads
- Pricing and model lineup change often, which makes limits hard to compare over time
- Answers can be wrong and need checking, especially for facts and citations
- The top Pro tiers cost $100 to $500 per month

## 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.

## FAQ

**Is ChatGPT better than Grammarly?**

It depends on your workflow. ChatGPT is built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant. Grammarly is built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team.

**What are the key feature differences between ChatGPT and Grammarly?**

ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat. Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. ChatGPT is rated 4.0/5 from 1 user review.

**Does ChatGPT or Grammarly have a free plan?**

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

**Which is cheaper, ChatGPT or Grammarly?**

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