Marijuana may be legal. Driving high isn't.

The world's first marijuana breathalyzer to measure
recent THC in breath on drivers at the roadside.

Innovation. Safety. Fairness.

The first dual marijuana & alcohol breathalyzer

Both detects and measures THC and alcohol in breath.

The first dual marijuana & alcohol breathalyzer is being tested by police


Using cutting-edge science and technology, Hound Labs, Inc. is the first company to detect and measure THC in breath. Using only one or two breaths, the patent-pending approach detects THC and measure levels to well below 500 picograms. The Company’s scientific breakthrough has been optimized to create a prototype of the first dual alcohol and marijuana breathalyzer at a price that will be practical for use by law enforcement at the roadside.

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About Hound Labs, Inc.

Hound Labs, Inc. is a scientific device company that developed the first technology to rapidly, accurately, and inexpensively detect and measure the levels of both marijuana and alcohol in a person’s breath. Dr. Mike Lynn, an ER physician, reserve deputy sheriff, and former venture capitalist and Mr. Kuni Oh, a patent attorney with deep technical background in engineering and science co-founded the Oakland-based company in 2014.

Learn about the Hound Foundation.