Hypothesis vs Opal
Hypothesis and Opal 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 | Hypothesis | Opal |
|---|---|---|
| Vendor | Hypothesis | Opal |
| Rating | ★ 4.5 | ★ 4.7 |
| Pricing | Freemium | Paid |
| Platforms | Web, LMS | iOS |
| Key features | In-page notes, Public or private, Open source | App limits, Deep Focus, iOS Screen Time+ |
| Headquarters | San Francisco, USA | USA |
| Founded | 2011 | 2020 |
| Open source | Yes | No |
Key differences
- Opal has a higher user rating (4.7★ vs 4.5★).
- Hypothesis is Freemium, while Opal is Paid.
- Hypothesis is open source (its code is public), while Opal is proprietary.
- Hypothesis runs on Web, LMS; Opal runs on iOS.
Frequently asked questions
Is Hypothesis or Opal better?
By user rating, Opal scores higher (4.7★ vs 4.5★). Both are capable Productivity tools, so review the feature comparison for your use case.
Which is cheaper, Hypothesis or Opal?
Hypothesis is Freemium and Opal is Paid. Check each product page for current plan details.
Are Hypothesis and Opal open source?
Hypothesis is open source, while Opal is proprietary.