# Grammarly vs Otter.ai

> Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app
> Otter.ai: Record, transcribe and summarize meetings, with action items and searchable AI chat

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

## Verdict

Grammarly is listed under AI Assistants and Otter.ai under Audio & Speech AI. Both have a free plan or trial. Only Grammarly is available on Firefox Extension.

### 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 Otter.ai if

- You want a tool built for meeting transcription and summaries.
- Permanent free plan with 300 monthly transcription minutes.
- Works through a notetaker bot or bot-free via desktop apps and Chrome extension.

## Pricing

| | Grammarly | Otter.ai |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Grammarly | Otter.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 |
| Live transcription | Not listed | Yes |
| Notetaker bot | Not listed | Yes |
| Bot-free recording | Not listed | Yes |
| AI summaries and action items | Not listed | Yes |
| Otter AI Chat | Not listed | Yes |
| Channels | Not listed | Yes |
| File import | Not listed | Yes |
| CRM sync | Not listed | Yes |
| Otter MCP server | Not listed | Yes |

## Platforms

| Platform | Grammarly | Otter.ai |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Browser Extension | No | No |
| Chrome Extension | Yes | Yes |
| 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.

## Otter.ai strengths

- Permanent free plan with 300 monthly transcription minutes
- Works through a notetaker bot or bot-free via desktop apps and Chrome extension
- Summaries, action items and AI Chat across past meetings
- Apps for web, iOS, Android, Mac and Windows, rated 4.8 on the App Store from 86K ratings
- Integrations with Zoom, Teams, Google Meet, Slack and CRMs such as Salesforce and HubSpot

## Otter.ai limitations

- Free plan caps conversations at 30 minutes and file imports at 3 lifetime
- Pro caps monthly transcription at 1,200 minutes and meetings at 90 minutes
- Business costs $30 per user per month on monthly billing
- API access, SSO and HIPAA add-on require the Enterprise plan
- Transcription is limited to six listed languages

## FAQ

**Is Grammarly better than Otter.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. Otter.ai is built for meeting transcription and summaries.

**What are the key feature differences between Grammarly and Otter.ai?**

Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. Otter.ai: Record, transcribe and summarize meetings, with action items and searchable AI chat.

**Does Grammarly or Otter.ai have a free plan?**

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

**Which is cheaper, Grammarly or Otter.ai?**

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