Top Tech Startups in California, US in 2027

CityZeen aims to transform the situation for over 1 billion individuals globally who lack access to secure, high-quality housing, as well as the millions more who lose out on valuable investment opportunities. With CityZeen, you're not just growing your wealth—you’re part of a movement to make sustainable living accessible for everyone.

Raizz is building a new kind of sleep wearable designed not just to track sleep, but to actively help people sleep better. Our wearable combines advanced sleep sensing, AI, and gentle closed-loop neurotechnology to understand sleep in real time and respond when needed. We’re building an integrated hardware and software experience that turns sleep data into personalized support — both during the night and throughout the day. We’re an early-stage, venture-backed team with backgrounds from Apple, Stanford, and Tsinghua, bringing together expertise across consumer hardware, software, AI, sleep science, and design. We’re preparing to launch our first product and are building the team that will take Raizz from an ambitious idea to a product used by people every night.

C5R is building facilities that connect frontier AI to the physical world. We believe this connection is a force for good in expanding humanity's scientific discovery.