Bryan Johnson is an American entrepreneur, venture capitalist, writer, and author. He is the founder of Blueprint and Don't Die. Johnson is also known for founding Kernel, a company creating devices that monitor and record brain activity, and OS Fund, a venture capital firm that invests in early-stage science and technology companies.
Previously, Johnson founded Braintree in 2007, a company specializing in mobile and web payment systems for e-commerce. Braintree acquired Venmo in 2012 for $26.