Reliable Managed CI for GitHub Actions

[ Reliability ]

Stop thinking about your CI

Blacksmith is managed CI for GitHub Actions, built to disappear. Bare metal hardware. Co-located caching. Up to 2x faster, 60% cheaper.

- runs-on: ubuntu-latest

█

Try for free

No credit card required.

CONTACT THE TEAM

If you're thinking about your CI, it's broken

CI should be invisible. You push code. Builds run. Tests pass or fail. You move on.

When CI starts showing up in your day, queueing jobs, dropping runners, eating an afternoon of debugging, that's not normal. That's the system telling you it's not built for production work.

Blacksmith is built to get out of your way and stay there.

/ build

■

Purpose-built for CI. End to end.

Blacksmith runs on bare metal hardware purpose-built for CI workloads. Your caches sit on co-located NVMe in the same data center as your jobs. No cold starts. No queuing for runners. No shared cache to fight over.

Bare metal infrastructure

Built and operated for CI workloads.

50M+ jobs monthly

3,000+ engineering teams running production CI on Blacksmith.

Public status page

Every incident, every degradation, in real time.

View Status

/ Migration

■

One line. No rewrites. Done.

Change one field in your workflow file. Blacksmith works with everything you already have. Workflows, secrets, caches, matrix builds, reusable workflows. Nothing to learn. Nothing to refactor. Nothing to maintain.

Existing GitHub Actions workflows

GitHub Actions cache

Secrets and environment variables

Matrix builds and reusable workflows

Self-hosted runner replacement

/ Performance

■

Speed and cost are the easy part

Bare metal gaming CPUs. Co-located caching. Persistent Docker layers on NVMe. When the infrastructure is right, fast and cheap come for free.

See pricing

■ 01

Instantly provision microVMs

We work hard so you never have to see "Waiting for a runner to pick up this job" again.

■ 02

Absurdly fast CI

We cut your build, test, and deploy time in half, so you get feedback on your PRs right away

■ 03

75% more cost-efficient

We built faster CI in a way that doesn't break your bank. We aren't even asking you to spend more.

/ Proof

■

Production CI for teams that ship every day

■ Read story

75% lower CI costs. 2x deployment frequency

■ Read story

2x faster deploys. 70% lower CI spend

/ Performance

■

Engineering posture, not a side project

See Security

■ 01

SOC 2 Type I

Independently audited.

■ 02

Firecracker microVMs

KVM hardware isolation. Ephemeral. State destroyed on completion.

■ 03

Instant provisioning

Jobs start immediately. Every time.

■ 04

Premium SLAs

Contractual uptime commitments on enterprise plans.

/ FAQ

■

Common questions

If we missed anything, just reach out. We’re happy to help.

Contact support

What does Blacksmith actually run on?

Bare metal hardware purpose-built for CI workloads. Each job runs in an ephemeral Firecracker microVM with KVM hardware isolation. Caches sit on co-located NVMe in the same data center as your runners.

What happens during a Blacksmith incident?

Every incident, including degraded performance, gets published in real time at status.blacksmith.sh. Subscribe by email or RSS.

Do you offer an SLA?

Yes. Premium SLAs come with our enterprise plan, alongside dedicated 24/7 support and a private Slack channel.

How long does migration take?

Five minutes. One line in your workflow file. No new tooling, no rewrites, no parallel infrastructure.

Does Blacksmith replace self-hosted runners?

Yes. Drop Blacksmith in and stop maintaining EC2, autoscaling groups, runner update cycles, or security patches.

SOC 2 and security?

Type I compliant. Ephemeral Firecracker microVMs with KVM hardware isolation. State destroyed on completion. Reports available on request.

Fix your CI for the last time

3,000 free minutes. One line change. No credit card.

Try for free

Contact the team