The archive · Hardware & Devices · Product decision · 2025–2026
GrazeMate bets AI drones replace cattle mustering; YC-led A$1.2M, renamed Brumby
Queensland station kid Sam Rogers drops out of uni to build autonomous herding drones; YC-led A$1.2M pre-seed, pilots moving thousands of cattle weekly.
GrazeMate (Brumby)
What the business is
GrazeMate builds autonomous drone software that herds cattle between paddocks, estimating weight, grass and water levels from a phone app.
Starting capital：A$1.2 million pre-seed led by Y Combinator, with Antler and NextGen Ventures participating.
How it started
Founded in 2025 by Sam Rogers, who grew up on his family's 6,000-head cattle station in Queensland and dropped out of a robotics degree at the University of Sydney. He had seen mustering take hours daily and cost over A$100,000 a year, and believed autonomous drones could do the job of helicopters, motorbikes and horses.
What happened
GrazeMate joined Y Combinator's Winter 2026 batch and raised an A$1.2 million pre-seed led by YC in January 2026, with Antler and NextGen Ventures participating. It ran pilot farms in Queensland and New South Wales, mustering thousands of cattle weekly across 1.7 million acres with reinforcement-learning models on DJI drones. The company leases drones and charges a monthly fee, and was renamed Brumby as it turned to the US market.
How it ended up
Still active as of September 2026. GrazeMate renamed itself Brumby, lists as an active YC Winter 2026 company with a three-person team, and says it works with some of the largest cattle ranches in the world while onboarding early US partners.
Background
GrazeMate (now Brumby) is an Australian startup betting that fully autonomous drones can replace helicopters, motorbikes and horses in cattle mustering. Founded by Sam Rogers, who grew up on his family's 6,000-head Queensland cattle station, it joined Y Combinator's Winter 2026 batch and raised an A$1.2 million pre-seed led by YC, with Antler and NextGen Ventures participating.
The product uses off-the-shelf DJI drones running GrazeMate's reinforcement-learning models, which read cattle behavior and apply pressure the way an experienced stockman would. Ranchers launch a move from a phone app; the drone guides the mob between paddocks and also estimates animal weight, grass biomass and water levels.
By early 2026 GrazeMate was running two pilot farms in Queensland and New South Wales, mustering thousands of cattle per week over 1.7 million acres. Instead of selling hardware, it leases drones and charges a monthly fee, priced below what ranchers currently spend on mustering labor and equipment.
The company renamed itself Brumby and turned to the US market, saying it works with some of the largest cattle ranches in the world. It remains active as of September 2026.
What has to be true
- Mustering is a hated, expensive chore: ranchers spend hours daily and up to $1M a year moving cattle, so automation is easy to price against.
- GrazeMate bets on one shared drone instead of per-animal hardware, arguing smart collars cannot make economic sense on huge properties.
- Leasing the drone with a software fee turns hardware into a recurring service aligned with the labor it replaces.
- The YC Winter 2026 slot and A$1.2M pre-seed let a student founder get hardware in the field on two continents.
What can be applied
Price against the pain you remove: lease one drone that scales to thousands of head, charge less than the labor and helicopter hours it replaces — sell the outcome, not the hardware.
Aftermath
As of September 1, 2026, Brumby (formerly GrazeMate) is an active YC Winter 2026 company headquartered in Sydney with a three-person team. After the A$1.2M pre-seed led by Y Combinator in January 2026, it completed pilots in Queensland and New South Wales, mustering thousands of cattle weekly across 1.7 million acres, then renamed itself Brumby and began onboarding early US partners. It says its drones work with some of the largest cattle ranches in the world and still offers the drone-plus-software lease model, targeting large grazing operations in the US and beyond.
Sources
- From moon hotels to cattle herding: 8 startups investors chased at YC Demo Day
- Robot cowboys: GrazeMate bets on fully autonomous cattle mustering drones
- Brumby (Formerly GrazeMate): Robot Cowboys that Herd Cattle with AI Drones
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