Baremetal turns the Macs and Linux machines you own into a self-scaling fleet of single-use runners — so your builds run fast, isolated, and disposable, without paying for hosted CI.
curl -fsSL https://baremetal.run/install.sh | bash -s -- cjt_…Just managing your fleet? Set up the CLI on your work computer.
Free while in beta · no credit card · your keys stay on the control plane
Hosted runners — macOS especially — are the most expensive minutes you can buy, billed at a steep multiplier you don’t control.
Persistent runners accumulate state, leak secrets between jobs, and need babysitting to scale up and down.
A Mac mini or a Linux box sitting on a shelf can outrun cloud CI — if something safely turns it into ephemeral runners.
A guided flow creates a GitHub App scoped to your org or a single repo. The private key stays in restricted server-side storage, separate from the product database and your runner machines.
One command on each Apple Silicon Mac or Linux box installs the agent and joins it to your workspace. No notarization, no inbound ports — the machine dials out.
Pick an image, a size, and a warm-runner count. Baremetal targets that many ready runners; set the warm target to zero to release idle capacity.
Every job gets a fresh, single-use VM — a Tart VM on a Mac, a KVM VM on Linux. It runs your workflow, then is destroyed. No state leaks between jobs, ever.
A clean VM per job, torn down afterwards. No leftover caches, credentials, or state between builds.
Pools track queued demand and can idle down to zero with a zero warm target. You pay for electricity, not idle cloud minutes.
Runs on the Macs and Linux machines you already own. No per-minute bill — including the priciest CI tier there is, hosted macOS.
You own the integration. The key stays on the control plane and is used to mint short-lived, single-job runner registrations.
Agents and the runners scheduled onto them are label-fenced to your workspace. Your machines are never shared — this is not a marketplace.
Real macOS VMs on Apple Silicon via Tart, Linux VMs via QEMU/KVM, with nested virtualization for workloads like Android emulators — honouring each platform’s limits.
Setup, architecture, cost and troubleshooting in our GitHub Actions runner guides.
Plan a fleet on your own hardware, compare persistent and ephemeral runners, and connect your first workflow.
Use an Apple Silicon Mac for Xcode builds and tests in clean Tart VMs. Plan images, memory and concurrency.
Compare hosted bills with hardware, power and maintenance. Enter your own numbers to estimate monthly costs and break-even volume.
GitHub App keys stay on the control plane, separate from the product database. Single-use runners destroyed after every job. Outbound-only connections. The dashboard has zero database access — every action goes through an authenticated API. We only claim what the architecture backs.
Read the security model →You run on your own hardware, so there’s no per-minute charge. Pricing for any future paid plans hasn’t been set yet.
A machine you own — an Apple Silicon Mac (M1 or newer) with Homebrew, or any Linux box with KVM (hardware virtualization) — plus a GitHub org or repo you administer. Either way you install a tiny agent with one command.
No. Your jobs run on your own hardware, so there is no per-minute compute charge from us. Baremetal is free while we are in beta.
In restricted storage on the control-plane server, separate from the product database. They are not sent to your runner machines. They are used only to mint short-lived, single-job runner registration tokens.
Never. Agents and the runners scheduled onto them are fenced to your workspace by label. Baremetal orchestrates your hardware for you — it does not rent it out.
No. Every connection is outbound: your machine dials the cloud backend. Nothing reaches into your machines, which keeps it NAT- and firewall-friendly.
The entire VM is destroyed. Each job starts from a pristine image and leaves nothing behind, so secrets and artifacts never survive into the next job.
Connect GitHub, add a machine, and watch your first ephemeral runner come online in minutes.
Get started free →