Dia vs Hypothesis
Dia and Hypothesis 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 | Hypothesis |
|---|---|---|
| Vendor | The Browser Company | Hypothesis |
| Rating | ★ 4.4 | ★ 4.5 |
| Pricing | Freemium | Freemium |
| Platforms | Desktop, macOS | Web, LMS |
| Key features | Chat with the current page, Skills and actions, Calmer UI than Arc | In-page notes, Public or private, Open source |
| Headquarters | New York, USA | San Francisco, USA |
| Founded | 2025 | 2011 |
| Open source | No | Yes |
Key differences
- Hypothesis has a higher user rating (4.5★ vs 4.4★).
- Both Dia and Hypothesis use a Freemium model.
- Hypothesis is open source (its code is public), while Dia is proprietary.
- Dia runs on Desktop, macOS; Hypothesis runs on Web, LMS.
Frequently asked questions
Is Dia or Hypothesis better?
By user rating, Hypothesis scores higher (4.5★ vs 4.4★). Both are capable Productivity tools, so review the feature comparison for your use case.
Which is cheaper, Dia or Hypothesis?
Both Dia and Hypothesis use a Freemium pricing model.
Are Dia and Hypothesis open source?
Hypothesis is open source, while Dia is proprietary.