2022 - NewLimit is working to radically extend human healthspan using epigenetic reprogramming.
2020 - ResearchHub is helping accelerate the pace of scientific research.
2019 - I signed the GivingPledge.
2018 - GiveCrypto.org - a non-profit distributing cryptocurrency globally. Now part of Coinbase Pledge 1%.
2012 - Coinbase - helping create an open financial system for the world.
2004 - UniversityTutor - a free online directory of tutors. Acquired in 2014.