About
We grew up on farms and in labs
Ana Ruiz grew up on her family's tomato farm near Woodland. She watched her dad water by feel and by calendar, and wanted better data for growers like him.
She met Sam Okoro at UC Davis in 2021. Two years and 300 prototypes later, the first Tilth Probes went into the ground.

CEO
Ana Ruiz
PhD in soil science from UC Davis. Spent 6 years as an irrigation researcher before starting Tilth.
CTO
Sam Okoro
Built low-power wireless sensors for wind farms for 8 years. Owns more soldering irons than shoes.
Head of farms
Jules Tran
Former crop advisor in the Central Valley. Visits every pilot farm at least once a season.
How we work
Three rules we hold ourselves to, from the first prototype to the last support call.
- Farmers first: we build what growers ask for, in the order they ask.
- Hardware that lasts: every probe is built for 3 seasons in the dirt.
- Your data is yours: export it any time. We never sell it.
Visit us in Davis
2121 Second Street, Suite B, Davis, CA 95618. Drop by on a Friday afternoon for a demo.