Hypothesis
Annotate the live web: public and private notes on any page — Instapaper's more annotation-native cousin for people who want the highlight to stay on the URL.
Product preview
Overview
Hypothesis is Instapaper if the highlight should stay on the page: annotate the live URL, share it, teach on it. Readwise files; this stays.
It is a layer, not a queue. The product is the note on the web. If later should live on the URL, this is annotation. If it should live in a reader, Instapaper.
Pros / Cons
Pros
- Highlights that stay on the URL
- Public annotation for teaching
- Open source
- LMS-native
Cons
- Not a reading queue
- A layer you must install
- Not Readwise's vault
Who it's for
Annotating a live article
Teaching on a shared URL
Leaving Instapaper for the page
Public web notes
Bottom line
Notes on the live web — Hypothesis if the highlight should stay on the URL, Instapaper if it should leave the page.
Key Features
Tags
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Frequently asked questions
What is Hypothesis?
Hypothesis is a Productivity tool developed by Hypothesis. The company was founded in 2011 and is headquartered in San Francisco, USA. Annotate the live web: public and private notes on any page — Instapaper's more annotation-native cousin for people who want the highlight to stay on the URL.
Is Hypothesis free?
Hypothesis uses a freemium model: a free tier is available, and paid plans unlock more usage and advanced features.
Is Hypothesis open source?
Yes — Hypothesis is open source. The source code is publicly available at https://github.com/hypothesis/h.
What are the best alternatives to Hypothesis?
Notable Productivity alternatives include Notion AI, Grammarly, Canva AI. Browse all 4 tools in our Productivity category for a full overview.
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Basic Info
- Pricing
- Freemium
- Rating
- ★ 4.5 (1,600 reviews) Ratings explained
- Platforms
- WebLMS
- Founded
- 2011
- Headquarters
- San Francisco, USA
- Last verified
- 2026-09-11
