Dia vs Project Mariner
Dia and Project Mariner are both Productivity tools in our directory. This side-by-side comparison covers pricing, user ratings, supported platforms, key features and open-source status so you can decide which one fits your needs.
Side-by-side comparison
| Attribute | Dia | Project Mariner |
|---|---|---|
| Vendor | The Browser Company | Google DeepMind |
| Rating | ★ 4.4 | ★ 4.4 |
| Pricing | Freemium | Paid |
| Platforms | Desktop, macOS | Web, Chrome |
| Key features | Chat with the current page, Skills and actions, Calmer UI than Arc | Browser agent in Chrome, Clicks and types on the live page, Gemini-powered computer use |
| Headquarters | New York, USA | Mountain View, USA |
| Founded | 2025 | 2024 |
| Open source | No | No |
Key differences
- Dia and Project Mariner share the same user rating (4.4★).
- Dia is Freemium, while Project Mariner is Paid.
- Dia runs on Desktop, macOS; Project Mariner runs on Web, Chrome.
Frequently asked questions
Is Dia or Project Mariner better?
Dia and Project Mariner are rated equally (4.4★) by users, so the better choice depends on your needs — see the feature and platform comparison above.
Which is cheaper, Dia or Project Mariner?
Dia is Freemium and Project Mariner is Paid. Check each product page for current plan details.
Are Dia and Project Mariner open source?
No — neither Dia nor Project Mariner is open source.