ChatPDF vs Dia
ChatPDF and Dia 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 | ChatPDF | Dia |
|---|---|---|
| Vendor | ChatPDF | The Browser Company |
| Rating | ★ 4.3 | ★ 4.4 |
| Pricing | Freemium | Freemium |
| Platforms | Web | Desktop, macOS |
| Key features | Instant PDF Q&A with citations, Multi-file chats, Multi-language documents | Chat with the current page, Skills and actions, Calmer UI than Arc |
| Headquarters | Remote, Germany | New York, USA |
| Founded | 2023 | 2025 |
| Open source | No | No |
Key differences
- Dia has a higher user rating (4.4★ vs 4.3★).
- Both ChatPDF and Dia use a Freemium model.
- ChatPDF runs on Web; Dia runs on Desktop, macOS.
Frequently asked questions
Is ChatPDF or Dia better?
By user rating, Dia scores higher (4.4★ vs 4.3★). Both are capable Productivity tools, so review the feature comparison for your use case.
Which is cheaper, ChatPDF or Dia?
Both ChatPDF and Dia use a Freemium pricing model.
Are ChatPDF and Dia open source?
No — neither ChatPDF nor Dia is open source.