# Cartesia vs Otter.ai

> Cartesia: Real-time speech AI for developers: fast text-to-speech, transcription and voice agents
> Otter.ai: Record, transcribe and summarize meetings, with action items and searchable AI chat

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

## Verdict

Cartesia and Otter.ai are both Audio & Speech AI tools. Both have a free plan or trial. Only Otter.ai is available on Windows, macOS and iOS.

### Choose Cartesia if

- You want a tool built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications.
- Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
- Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.

### 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

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

## Features

| Feature | Cartesia | Otter.ai |
| --- | --- | --- |
| Sonic Text-to-Speech | Yes | Not listed |
| Ink Speech-to-Text | Yes | Not listed |
| Managed Agents | Yes | Not listed |
| Voice Cloning | Yes | Not listed |
| Pronunciation Dictionaries | Yes | Not listed |
| Regional API Routing | Yes | Not listed |
| Telephony Support | Yes | Not listed |
| Python and JavaScript SDKs | Yes | Not listed |
| Usage and Access Controls | 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 | Cartesia | Otter.ai |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | Yes |
| macOS | No | Yes |
| iOS | No | Yes |
| Android | No | Yes |
| API | Yes | Yes |
| Browser Extension | No | No |
| Chrome Extension | No | Yes |

## Cartesia strengths

- Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
- Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.
- One platform covers text-to-speech, speech-to-text and managed voice agents.
- Regional endpoints in the US, EU and APAC, with on-premise and on-device options.
- Frequent releases: the changelog shows monthly model, voice and API updates in 2026.
- Ranked first on Artificial Analysis speech leaderboards according to the company.

## Cartesia limitations

- The free tier has no instant voice cloning, only 2 concurrent TTS requests and no commercial license.
- Credit-based billing with overage up to $65 per 1M credits can be hard to forecast as usage grows.
- Independent reviews note a smaller preset voice library than some narrative-focused competitors.
- Developer-oriented; there is no consumer app and no released iOS or Android app.

## 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 Cartesia better than Otter.ai?**

It depends on your workflow. Cartesia is built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications. Otter.ai is built for meeting transcription and summaries.

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

Cartesia: Real-time speech AI for developers: fast text-to-speech, transcription and voice agents. Otter.ai: Record, transcribe and summarize meetings, with action items and searchable AI chat.

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

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

**Which is cheaper, Cartesia 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.