Reservations open now. Assembled OpenCollars, built by openpasture. Reserve now
Should Flock A move today?
Today
Move Flock A to paddock 5.
Waiting for you
no timer
Sends to collars in
06:42:10
Sent at 06:00, collars applied
42 / 42
Needs you. A photo of the north corner of P5 before the move.
Weather, imagery, soil, and forage will come from Alexandria, powered by Firecrawl, alongside where every collar is.
The roadmapStay, move to a specific paddock, or ask you for one more look. Always with reasons.
The softwareThe new boundary goes to the collars. The move counts once they say they applied it.
OpenCollar# run today's decision for one herd $ curl -X POST localhost:7878/api/herds/herd_1/decide
{
"action": "MOVE",
"to_paddock_id": "pad_4",
"reasoning": "Paddock 4 has rested 38 days.",
"confidence": 0.72
}
# boundary down to every collar in the herd { "version": 42, "effective_at": "2026-09-25T12:30:00Z", "boundary": [[-92.41, 38.12], …], "warn_m": 10 }
# each collar answers { "version": 42, "status": "applied", "at": "2026-09-25T12:30:04Z" }
# positions come back on a schedule
# and on events, batched to save power
{
"collar_id": "oc_0012",
"boundary_version": 42,
"fixes": [{ "accuracy_m": 1.8, "sats": 9 }],
"battery": 0.81
}
A desktop app, or one binary.
Linux x64. Other platforms are on the download page.
curl -L https://github.com/open-pasture/openpasture/releases/latest/download/openpasture-server-linux-x64.tar.gz | tar xz ./openpasture serve
Then open localhost:7878.
docker run -p 7878:7878 -v openpasture:/data ghcr.io/open-pasture/openpasture
Until collars report over cellular, simulate a herd over the real protocol.
./collar-sim --count 12
Any brain, or none.
your ChatGPT planyour Claude planAPI keyany endpointbuilt-in heuristicOpenCollar's design, parts list, and firmware, published as they settle, so anyone can build or repair one.
The parts listA documented device protocol and open-source integration, so any software can run the collars, not just ours.
How it connectsYou never have to buy anything from us. Build the collar, run the software, keep it all. We sell the version where someone else does the work.
Open for farmers, not for the taking. Every farmer can build, repair, and run what they own. The software is AGPL-3.0, so a company that offers a modified copy as a service has to publish its changes.
First GPS fix. Cold start, open sky, no assistance. Settled to 2.2 m within a minute.
Sep 25One board does the processor, LTE-M, and GPS. The only other module is a buzzer.
Sep 25Decided to write our own firmware on the nRF Connect SDK.
Sep 25Geofence engine and cue policy in plain C, with host tests. All pass.
Sep 25First flash: BusFault. Wrong partition layout. Attempt two boots and loads a boundary.
Sep 25Backed up the factory flash before touching anything.
Collar protocol drafted. Boundaries go down, acknowledgements and positions come up.
Sep 25Fence logic stays on the collar. The network only changes where the line is.
Sep 25V1 sketched: sealed top unit, GPS at the crown, solar on either side.
Sep 25The counterweight became a bay: ballast, a camera, or a battery.
Sep 25All prototype parts delivered. Laid out on the desk and photographed.
Sep 14Components for collar 01 ordered on a personal card.
It's its own open initiative. We started it, contribute to it, and sell it assembled, and we want other contributors and teams building it with us. Anyone can build one or write software for it.
No. The integration is open source and the device protocol is being documented, so any software that speaks it can run the collars. Ours is one option.
You can reserve an assembled one from us. A $50 reservation fee per collar holds your place in the first batch. Before it ships, you configure and confirm your order and the fee is applied to it. Until then it's fully refundable. Reserve now.
The targets: the prototype complete by mid-October 2026, the V1 design final by the end of 2026, and the first batch delivered to early adopters in Q1 2027. They may move; progress goes on the build log.
Pricing is expected to start at $249 per assembled collar, with the Battery Extension and camera module as add-ons you choose when you configure your order. The price is confirmed before you order. Or build one yourself from the parts list.
Not to hold the fence. Boundary logic is designed to run on the collar, which keeps its last good boundary. Signal is for new boundaries and position reports.
Sheep first, then cattle. The first live test will be on sheep, alongside a farm's existing fence.
A company working to scale pasture-based agriculture through automation. We build the software that decides where livestock move, we started the OpenCollar initiative, and we sell hosting and assembled collars.
No. You can build an OpenCollar from the parts list and run our software on your own machine for free. We sell the convenience: collars built for you, and software hosted for you.
Because the goal is more farms on pasture, and more people can build on what's open. Every farmer keeps the right to build, repair, and run what they own. The software is AGPL-3.0, so a company that builds a service on it has to publish its changes. The hardware license isn't decided yet.
The software is built around OpenCollar, with a first-party integration. Until a collar is on your herd, collar-sim runs a simulated herd over the real protocol, so the whole loop works.
Free under AGPL-3.0 on your own machine. Your model provider bills you as usual. A hosted version, by subscription, is planned.
Alexandria, powered by Firecrawl, will provide weather, imagery, soil, and more for your paddocks. Without it, an open-data fallback fills in the weather.
Yes. The desktop app for macOS, or one server binary for Linux, macOS, and Docker, runs on your own machine. No cloud product required. Download.
Expected from $249, first batch in Q1 2027. $50 to reserve, fully refundable.
You're on the list. You'll hear at each milestone.
That didn't go through. Try again in a moment, or email cody@openpasture.dev.
Are you an agent? Start with the MCP tools1$249 is a back-of-the-envelope target for the assembled OpenCollar (top unit, strap, and ballast module) in US dollars, not a quote. Reaching it likely depends on designing our own custom board, which we plan to sell on its own as well, alongside the other components and the 3D-printed designs. It is our target, and we may not hit it. It excludes add-ons, shipping, taxes, and fees, and the actual price is confirmed before you order.
2The OpenCollar is a prototype. Specifications are V1 design targets, not measurements, unless marked as measured. Our targets are the prototype complete by mid-October 2026, the V1 design final by the end of 2026, and the first batch delivered to early adopters in Q1 2027. They are targets, not commitments, and may change.
3The reservation fee is $50 per collar, paid through Stripe. It is fully refundable at any time before you confirm an order, and applied to the purchase price when you do. A reservation is not an order and does not guarantee a price or a delivery date. See the terms.
4openpasture software features such as proposed and scheduled moves describe the design in progress. What works today is in the release notes and on the build log.