# DeepSeek vs Dia

> DeepSeek: Free AI chat app and low-cost API running DeepSeek's open-weights V4 models
> Dia: An AI-native web browser that answers questions across your tabs and work apps

- DeepSeek profile: https://finderatlas.com/tools/deepseek
- Dia profile: https://finderatlas.com/tools/dia
- Comparison page: https://finderatlas.com/compare/deepseek-vs-dia
- Last reviewed: October 2026

## Verdict

DeepSeek and Dia are both AI Assistants tools. DeepSeek scores higher in FinderAtlas's editorial review (8.8 vs 7.8 out of 10). Both have a free plan or trial. Only DeepSeek is available on Web, iOS and Android and offers an API.

### Choose DeepSeek if

- You want a tool built for Low-cost API integration.
- Web chat and mobile apps are free.
- API output costs from $0.60 per 1M tokens (Flash, off-peak), well below most frontier providers.

### Choose Dia if

- You want a tool built for asking questions across tabs and connected work apps, summarizing pages and meetings, and organizing many open tabs.
- Free to download, with a $20 per month Pro plan rather than a mandatory subscription.
- AI chat can use content from open tabs and connected work apps.

## Pricing

| | DeepSeek | Dia |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | DeepSeek | Dia |
| --- | --- | --- |
| V4 model family | Yes | Not listed |
| Thinking mode | Yes | Not listed |
| Open weights | Yes | Not listed |
| OpenAI and Anthropic compatible API | Yes | Not listed |
| Tool calls and JSON output | Yes | Not listed |
| Search and Fetch APIs | Yes | Not listed |
| Agent tool integrations | Yes | Not listed |
| DeepSeek Harness | Yes | Not listed |
| Vision on Flash | Yes | Not listed |
| Chat with your tabs | Not listed | Yes |
| Connected apps | Not listed | Yes |
| Skills | Not listed | Yes |
| Morning Brief | Not listed | Yes |
| Decks and reports | Not listed | Yes |
| Live Work | Not listed | Yes |
| Splits and organized tabs | Not listed | Yes |
| Profiles | Not listed | Yes |
| Privacy controls | Not listed | Yes |
| Dia for Work | Not listed | Yes |

## Platforms

| Platform | DeepSeek | Dia |
| --- | --- | --- |
| Web | Yes | No |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| iOS | Yes | No |
| Android | Yes | No |
| API | Yes | No |
| Browser Extension | No | No |

## DeepSeek strengths

- Web chat and mobile apps are free
- API output costs from $0.60 per 1M tokens (Flash, off-peak), well below most frontier providers
- Open weights for V4 and earlier models on Hugging Face
- 1M-token context and 384K max output on both API models
- API works with both OpenAI and Anthropic SDKs and several coding agents

## DeepSeek limitations

- Peak-hour API rates are double the off-peak rates on weekday mornings UTC
- deepseek-v4-pro does not support vision input
- No image generation
- Data is processed by a company based in China, which some organizations cannot accept

## Dia strengths

- Free to download, with a $20 per month Pro plan rather than a mandatory subscription.
- AI chat can use content from open tabs and connected work apps.
- Frequent releases: Mac v1.52.0 and v1.53.0 shipped in October 2026.
- Separate profiles keep work and personal tabs and AI context apart.
- Dia for Work provides SAML SSO, MDM policies and a SOC 2 Type II examination.

## Dia limitations

- Desktop only; no publicly released iOS or Android app.
- Windows version is new (v1.0 on October 6, 2026) and trails the Mac version.
- Free-tier AI usage limits are not published, and the site has no public pricing page.
- Several workflow features depend on connected work apps and a work-focused setup.

## FAQ

**Is DeepSeek better than Dia?**

It depends on your workflow. DeepSeek is built for Low-cost API integration. Dia is built for asking questions across tabs and connected work apps, summarizing pages and meetings, and organizing many open tabs.

**What are the key feature differences between DeepSeek and Dia?**

DeepSeek: Free AI chat app and low-cost API running DeepSeek's open-weights V4 models. Dia: An AI-native web browser that answers questions across your tabs and work apps.

**Does DeepSeek or Dia have a free plan?**

Yes, both do. DeepSeek is freemium and Dia is freemium, and each has a free plan or trial.

**Which is cheaper, DeepSeek or Dia?**

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