Hypothesis vs Leafy
Hypothesis
web.hypothes.isLeafy
get-leafy.comSide by side
| Figure | Hypothesis | Leafy |
|---|---|---|
| Price from | Free | $5,470/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | — |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 5 | 3 |
| Spec score · Web Annotation Tools | 8.5 (#6) | 8.1 (#10) |
| Purpose | Hypothesis adds collaborative annotations to digital course materials so learners can highlight passages, ask questions, and respond to peers in context. | Leafy lets people annotate, highlight, and comment on live webpages together in real time. |
| Security | Hypothesis says its security program includes static code analysis, dependency vulnerability monitoring, security assessments, and third-party penetration testing. | Leafy says data is stored in Google Cloud Firestore, encrypted in transit and at rest, with Firestore rules limiting record access to owners or garden members. |
| Support | The pricing page lists self-service support for Free and Bronze, standard email support for Bronze, and premium support with a dedicated customer success manager for Gold. | The Pro plan includes priority support, and Enterprise includes dedicated onboarding and support. |
Plans
Hypothesis
- FreeFree
- BronzePrice not published
- Custom solutionPriced on request
- GoldPrice not published
- SilverPrice not published
In their own words
Hypothesis
Hypothesis adds shared annotations to digital course materials, letting learners mark passages, ask questions, and reply to peers alongside the content. Users can create private highlights and page notes, add tags, and hold threaded discussions. Supported material includes web pages, PDFs, EPUB files, YouTube videos, and content from VitalSource and JSTOR. For institutional use, Hypothesis lists LTI 1.3 integrations with Canvas, Blackboard, Moodle, D2L Brightspace, and Sakai; annotations can also sync with LMS gradebooks, including Canvas SpeedGrader. A free account is available for personal use and collaboration. The web app works with a Chrome extension on Chrome and other Chromium browsers, or a bookmarklet in Firefox and Safari. Hypothesis also offers API access, exports in JSON, plain text, CSV, and HTML, and JSON import. The Free plan costs nothing, billed per student/yearly, and includes core annotation, private groups, and self-service support. The project was founded as an open-source project in 2011.