Choose Blacksmith if you need
- Ubuntu, Windows or macOS. We haven't found them on Harness CI's website.
- Integration with Docker. We haven't found it on Harness CI's website.
At a glance
- Both have a free plan.
- Blacksmith's lowest paid plan is macOS M4 at $0.08 per minute, as of October 28, 2026.
- Only Blacksmith lists Ubuntu, Windows and macOS.
- Only Harness CI lists API.
- Both work with GitHub Actions.
- Harness CI has a public API. We haven't confirmed one for Blacksmith.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Harness CI if you need
- API. We haven't found it on Blacksmith's website.
- Integration with GitHub, GitLab or Bitbucket. We haven't found them on Blacksmith's website.
Blacksmith
Nobody has reviewed Blacksmith yet. Its rating shows once it has 3 reviews.
Review Blacksmith
Harness CI
Nobody has reviewed Harness CI yet. Its rating shows once it has 3 reviews.
Review Harness CIThe facts
- What it does
- BlacksmithA drop-in replacement for GitHub runners that runs your GitHub Actions faster and costs less.
- Harness CIBuild and test AI code at scale
- Free plan
- BlacksmithYes
- Harness CIYes
- Pricing
- BlacksmithNot confirmed
- Harness CINot confirmed
- Paid plans from
- Blacksmith
What they share
From the platforms and integrations each website lists.
Platforms
BothNone in common
Only Blacksmith
- Ubuntu
- Windows
- macOS
Only Harness CI
- API
Integrations
Both
- GitHub Actions
Only Blacksmith
- Docker
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Blacksmith and Harness CI yet.
Used either of them?
Your review makes this comparison better for the next person. Review Blacksmith or review Harness CI.