Flourish raised $500 million at a $2.5 billion valuation (with some reports stretching to $3.5B) to build brain-inspired AI models that run on 20-50 watts — roughly the power draw of a laptop, not a rack of GPUs. The round closed five weeks after discussions began in late April, with Jeff Bezos doubling his initial $50M commitment to nearly $100M. Lux Capital, GV and Catalio Capital also participated.
Founder Thomas Reardon is the highest-pedigree serial founder in AI hardware. He created Internet Explorer at Microsoft in the 1990s, then founded CTRL-labs (brain-computer interface), which Meta acquired for an estimated $1B in 2019. Co-founder Rob Williams brings the neuroscience-hardware pairing that made CTRL-labs work.
“He created Internet Explorer at Microsoft in the 1990s, then founded CTRL-labs (brain-computer interface), which Meta acquired for an estimated $1B in 2019.”
The technology bet: 'Cortex AI' maps real neurons and their connections (a field called connectomics) and reproduces that computation pattern in specialized silicon. If it hits the 20-50W target, that's an order-of-magnitude improvement over transformer inference, which today burns kilowatts per query on frontier tasks.
Comparable deals and competitors: Rain AI (Sam Altman-backed) is building neuromorphic chips at ~$100M raised; Mythic pivoted away from consumer AI; Numenta remains research-stage. Flourish's $500M raise is 5x the largest previous check into brain-inspired AI and immediately makes it the category flagship.
What to watch: the first published benchmarks (Flourish has been silent on quantitative claims), whether Bezos brings Flourish's tech into Amazon's data-center strategy, and whether Meta (already a Reardon customer via CTRL-labs) makes an early partnership move.