You stay the operator.
Three speeds. Approve every move, let it send on a timer unless you hold it, or let it run.
It shows its work. Every call comes with its inputs, its reasons, and how sure it is.
| input | P4 | P5 |
|---|---|---|
| residual | ~4 in | full |
| rest | 0 d | 38 d |
| rain, 24 h | 12 mm | 12 mm |
| low side wet | yes | no |
-
oc_0012applied v42
12:30:04 -
oc_0013applied v42
12:30:05 -
oc_0014applied v42
12:30:05 -
oc_0015received v42
12:30:06
Every boundary acknowledged. Versions only go up. A move counts once the collars say they applied it.
Fence logic on the collar. It keeps the last good boundary and holds it with no signal. The network only changes where the line is.
Every day remembered. What it saw, what it decided, what you changed, and what the grass did next. That record is how it learns your ground.
What's in v0.1.0.
A desktop app for macOS and one server binary for Linux, macOS, and Docker. Self-hosted and open source; the server and its database run on your machine.
Until collars report over cellular, collar-sim runs a simulated herd over the real protocol.
- mapDraw paddocks on satellite imagery
- collarsLink collars, send a boundary, and watch every collar acknowledge it
- movesSet a target and the fence sweeps the herd in
- decisionsYour own Codex or Claude subscription, an API key, or a built-in heuristic
- dataCollar health, tracks and replay, pasture signals, an SQL console
- exportCSV, GeoJSON, and Parquet
On your machine
Free under AGPL-3.0. The Mac app, or the server on Linux, macOS, or Docker, with the model you already pay for, or none.
DownloadHosted by us
The same software, run for you, by subscription. Premium extensions come with it later. Planned; no prices or dates yet.
PricingWith OpenCollar
Built for OpenCollar, not the only way to run one. Any software can drive the collar through its open integration.
OpenCollarBe one of the first herds.
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.