A New York startup called Flourish just pulled in $500 million at a $2.5 billion valuation, with Jeff Bezos writing one of the biggest checks. The company’s pitch: stop trying to approximate how the brain works and start actually studying it.
Flourish is building what it calls Cortex AI, a system designed to emulate brain function by mapping real neurons and their connections, a field known as connectomics. The round closed around June 4, 2026, and included backing from Lux Capital, GV (Alphabet’s venture arm), and Catalio Capital. Bezos initially committed roughly $50 million but nearly doubled his stake after other high-profile investors piled in.
What Flourish is actually building
Cortex AI aims to operate in a range of 20 to 50 watts. For context, that’s roughly the power draw of a laptop, not a server rack. If the company delivers on that target, it would represent an order-of-magnitude improvement over conventional AI hardware.
The company doesn’t have a commercial product yet. This is a research lab, not a SaaS company. The $2.5 billion valuation, with the potential to stretch to $3.5 billion, is built entirely on founder pedigree and investor conviction that neuroscience-driven AI represents the next paradigm shift.
The team behind the bet
Flourish was co-founded by Thomas Reardon and Rob Williams. Reardon’s claim to fame is creating Internet Explorer at Microsoft. He later founded CTRL-labs, a brain-computer interface company that Meta acquired in 2019 for an estimated $1 billion, after which he directed neuromotor interface projects at Meta Reality Labs on the Neural Band wristband. Williams is a former Amazon S-team executive.
The startup had been operating under the radar before this round, making the $500 million raise its first major public moment. Funding discussions started in late April 2026, and the round closed in about five weeks.