Plunge

Plunge manufactures cold plunges and high-heat saunas, designed and assembled in Sacramento, California out of a 150,000 sq ft warehouse; the plunges are assembled in the US and the saunas handcrafted on site. The company started in a garage in 2020 after founder Michael Garrett's brick-and-mortar float spa was shut down by COVID-19 and he set out with his father to build a cold plunge; Ryan Duey later joined as partner, and an appearance on Shark Tank moved the brand into national visibility. Early growth came from an organic gifting campaign the company calls the Plunge Tour, which began with Aubrey Marcus and extended to figures including Andrew Huberman, Tony Hawk, and Rich Roll. Plunge states its designs are validated across 45 million sessions, and it operates a mobile app and enterprise dashboard with smart firmware and remote diagnostics for proactive issue resolution, backed by 100% US-based support and a nationwide service technician and assembly network. (Source: plunge.com, fetched 2026-08-07.)