Our team is working hard to build products and services built on our principles. However, we can’t do this alone. The long term success of open annotation depends on contributions from a wide array of sources.

Including yours! Here’s how you can join the effort.


We code and collaborate on GitHub. Our primary repository is h, and we keep ideas in vision.

We have long-form discussions on mailing list:

We chat in on freenode, which is also available as a public channel on Slack.  It’s a great place to meet contributors and community members, hang out, discuss the project, and get questions answered. There’s also a public forum, which is a less technical place for users to ask questions and discuss needs.

Check out our documentation for the h code base to learn about what we’ve built and how to use our roadmap.  Many have contributed tools, plug-ins and integrations, you can see a list of examples here.

License is Open Source. We typically use the 2-Clause BSD License (aka the “Simplified BSD License” or the “FreeBSD License”).

If you’re ready to dive in, checkout our contributor guide which details our work-flow, conventions, and explains our contributor license agreement.


If you’ve got ideas for projects related to web annotation, we also have grant opportunities! Find out more on the Open Annotation Fund site.

We’re a non-profit. We feel strongly that this structure best suits our vision making open annotation a reality. It aligns our interests with those that directly benefit from what we do.

Our long term strategy is one of revenue sustainability. As a non-profit many venture financing options are unavailable to us, so your contributions help greatly.

Please consider making a donation. We are so grateful to all the support we’ve received from major foundations and our kickstarter supporters.

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