Meet Our New Director of Product

22 Nov: Chris Shaw joins our product team, where he’ll coordinate how to augment Hypothesis to move social annotation forward. Learn about Chris's career arc, why he’s excited about Hypothesis, and his takes on bots, community building, huskies, and more.

30 Nov : Add your voice to the margins during this free three-day (30 Nov through 2 Dec) event hosted by Open Education Global to annotate the Building Capacity Action Area of the UNESCO Recommendation on OER. Join us >

Annotate the web,
with anyone,
anywhere.

Get Started

Engage your
students with
social annotation.

Learn More

See how it works.

Select text to annotate.
Add tags and post publicly or save privately.

Reply to or share any annotation.
Link to notes or whole pages.

Annotate together in groups.
Collaborate privately with others.

Search your notes.
Explore all public annotations and profiles.

An open community project.

We're a mission-driven organization.

Dedicated to enabling layers of conversation over the world's knowledge.

Building an open platform

That works everywhere, based on open-source technology and interoperable standards.

As a part of a global community.

Working with others across the world to advance human understanding for the public good.
Learn More
about Hypothesis.