Reservations open now. Assembled OpenCollars, built by openpasture. Reserve now

Free software.
A $249 collar.

openpasture, self-hosted

FreeAGPL-3.0

The software on your own machine: the Mac app, or the server on Linux, macOS, or Docker. Your model provider bills you as usual.

  • Paddocks, boundaries, and collar acknowledgements
  • Your own Codex or Claude plan, an API key, or none
  • Tracks, SQL console, and exports
Download

OpenCollar, assembled

from$2491

Built and tested by openpasture. Or build one yourself. Reserve with a $50 fee per collar; configure and confirm your order once the V1 design is final. First batch to early adopters in Q1 2027.

  • Works with software that isn't ours
  • Parts you can replace
  • $50 reservation, fully refundable
Reserve now

openpasture, hosted

Later

The same software, run for you, by subscription. Optional: a collar keeps working with other software whether or not you ever subscribe.

  • Optional, never required
  • Premium extensions included, later
  • No prices or dates yet
Follow the build

Be one of the first herds.

Expected from $249, first batch in Q1 2027. $50 to reserve, fully refundable.

Are you an agent? Start with the MCP tools
  1. 1

    $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.

  2. 2

    The 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.

  3. 3

    The 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.

  4. 4

    openpasture 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.