Sway

Sway is a California-based materials company making compostable replacements for single-use plastics from seaweed. Co-founded by CEO Julia Marsh, COO Matt Mayes and Leland Maschmeyer, the company pairs the properties of fast-growing seaweed with materials science to produce flexible, durable bags for shipping and shopping.

Sway works with a global network of seaweed farms and manufacturers, and its packaging is tested in-house, through third-party labs and with field partners, with certification performed by TÜV Austria. The company was a 2023 winner of the Tom Ford Plastic Innovation Prize with Lonely Whale, and Burton, Florence Marine X and Dr. Bronner’s count among the brands using its packaging.