Backdrop vs. Hypothesis
Annotation meets permanent archiving.
Highlight and keep the full page context.
Hypothesis is an open-standard web annotation tool that lets you highlight and annotate any webpage by overlaying a layer on top of the live page. It's widely used in education and research for collaborative annotation. But Hypothesis annotations live on top of the live web — when the page changes or disappears, your annotations lose their context. Backdrop gives you permanent page archives that include your annotations and highlights as part of the preserved content.
Feature comparison
| Feature | Backdrop | Hypothesis |
|---|---|---|
| Permanent page storage Hypothesis annotates live pages only | ||
| Multi-format capture Hypothesis doesn't capture page formats | ||
| Full-text search Hypothesis searches annotations | ||
| Annotations & highlights Hypothesis specializes in annotation | ||
| Entity tagging | ||
| Collaborative annotation Hypothesis is built for group annotation | ||
| Organized collections Hypothesis uses groups and tags | ||
| Browser extension Both offer browser extensions | ||
| Open standard Hypothesis uses W3C Web Annotation standard | ||
| Offline annotation Both require internet |
Backdrop wins here
Where Backdrop is the stronger choice
- Annotations are permanently tied to the archived page — they survive even if the original disappears
- Four capture formats preserve the full context behind every annotation
- Entity tagging for people, organizations, places, and topics provides structured discovery
- Organized collections with optional public sharing for annotated research
- Annotations and highlights persist as part of the permanent archive, not a separate layer
Hypothesis wins here
Where Hypothesis might be a better fit
- Excellent collaborative annotation workflow for classrooms and research groups
- Open standard (W3C Web Annotation) ensures interoperability and data portability
- Active academic community with extensive integration in educational platforms
Pricing
Backdrop
Free tier with 100 archives. Paid plans start at $5/month for unlimited archiving, full-text search, and priority processing.
Start freeHypothesis
Free for individuals. Institutional plans available for schools and organizations.
Verdict
Hypothesis is the leading tool for collaborative web annotation, especially in academic settings. Its annotations are ephemeral — they depend on the live page staying unchanged. Backdrop offers a different model: you archive the page first (preserving it permanently), then annotate and highlight within that archive. For researchers who need their annotations to survive link rot and page changes, Backdrop is the more reliable choice. For real-time collaborative annotation on live pages, Hypothesis is purpose-built.
Annotate with permanence
Every highlight preserved with the full page archive. Free to start.
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