Learn how to lock down your online accounts, secure your devices, and improve your digital privacy with cybersecurity courses anyone can understand.

Crypto projects built together with Nat Eliason.

Incubating apps for the e-commerce ecosystem.

A decentralized data marketplace.

History doesn’t repeat, but it rhymes. Join the NFT boom by owning a piece of the Dot Com Boom. Made ironically with Ammaar Reshi to celebrate the absurdity of the NFT market.

Engaging students in the education reform conversation. Co-founded in 2012 with Zak Malamed and Stephanie Rivera.

I designed labels for custom beers sold at Park Central Hotel NYC, the UK Royal Palace, and more.

Yelp for online courses.

A master checklist to secure your online life. The spiritual precursor to Digital Fortress.

Teach yourself anything using online resources of any type: online courses, YouTube, podcasts, books, blogs, and more.

Find the answer to the question "if I enjoyed this, what should I read next?"

Q&A forum for teachers to request and share educational content.

A better way for teachers to build curriculum collaboratively. Part of Y Combinator's Winter 2014 batch.