SEATTLE — Atomo Coffee Inc. raised an additional $9 million in seed funding to help scale its molecular coffee product, bringing the total amount raised by the company to $11.6 million.

Existing investor Horizon Ventures participated in the round, along with new investors S2G Ventures, AgFunder and Bessemer Venture Partners.

The Seattle-based startup is developing bean-free coffee made from upcycled plant ingredients. The brew packs the same caffeine content but is smoother and more sustainable than conventional coffee, said Jarret Stopforth, chief scientist and co-founder.

“Our flagship grounds formula is made of upcycled plant materials such as pits, seeds and stems from locally grown agriculture, mirroring the process of traditional coffee beans,” he said. “Atomo's magic comes from our proprietary bioreactive and thermal processes.”

Atomo will use the funds to build its production roastery with an anticipated launch of 2021.