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    Blacksmith Blog

    blacksmith.sh · Company blog · on HN since 2024

    Blacksmith, a Y Combinator-backed company selling faster, cheaper GitHub Actions runners, writes on CI, caching, and multitenancy economics.

    Visit blogHN submissions
    DevOps & CloudStartups
    What HN says

    HN commenters name it as an alternative to slow GitHub Actions, though one notes it had several outages in a week.

    Stats for nerds
    22HN people shared it
    32linked in comments
    969story points
    Aug 2026last shared
    2025people per year2026

    Top posts on HN

    1. 1
      The GitHub Actions control plane is no longer free
      3 people · 216 points · first shared 2025 · 3 comments on HN
    2. 2
      Cache is King: A guide for Docker layer caching in GitHub Actions
      1 person · 210 points · first shared 2024 · 109 comments on HN
    3. 3
      How the economics of multitenancy work
      2 people · 191 points · first shared 2025 · 46 comments on HN
    4. 4
      Reverse engineering GitHub Actions cache to make it fast
      1 person · 154 points · first shared 2025 · 37 comments on HN
    5. 5
      Faster Docker builds using a remote BuildKit instance
      1 person · 75 points · first shared 2024 · 47 comments on HN
    6. 6
      We built a logging platform for GitHub Actions with ClickHouse
      3 people · 23 points · first shared 2025 · 2 comments on HN
    7. 7
      What it was like going through YC W24
      2 people · 18 points · first shared 2024 · 4 comments on HN
    8. 8
      Stacked Diffs Can Be Expensive: Why You Should Do It More
      2 people · 13 points · first shared 2024 · 3 comments on HN
    9. 9
      You have 5 days before the new DockerHub limits hit you
      1 person · 9 points · first shared 2025 · 1 comments on HN
    10. 10
      How we SSH into GitHub Actions
      1 person · 9 points · first shared 2025 · Discussion on HN

    What HN people wrote when they linked it

    • jalazizMar 2025

      GitHub Actions started off great as they were quickly iterating, but it very much seems that GitHub has taken its eye of the ball and the improvements have all but halted.

      It's really upsetting how little attention Actions is getting these days (<https://github.com/orgs/community/discussions/categories/actions?discussions_q=is%3Aopen+category%3AActions+sort%3Atop> tells the story -- the most popular issues have gone completely unanswered).

      Sad to see Earthly halting development and Dagger jumping on the AI train :(. Hopefully we'll get a proper alternative.

      On a related note, if you're considering https://www.blacksmith.sh/, you really should consider https://depot.dev/. We evaluated both but went with Depot because the team is insanely smart and they've solved some pretty neat challenges. One of the cooler features is that their caching works with the default actions/cache action. There's absolutely no need to switch out popular third party actions in favor of patched ones.

    • latchkeyAug 2026

      blacksmith.sh just raised tens of millions on the core premise that self-hosting CI/CD is hard [0].

      they've had multiple outages in the last week, so i guess they are proving themselves correct.

      in practice, giving ssh/sudo to AI (codex) and telling it to setup ephemeral runners on your own host VM, takes about 30 minutes and works extremely well. it bangs out all the shell scripts. moved my own business over to it. zero problems.

      [0] https://www.blacksmith.sh/blog/blacksmith-seed-announcement

    • EikonMar 2025

      > You have 5 days before the new DockerHub limits f*ck you over.

      How classy from a somewhat DockerHub competitor: https://www.blacksmith.sh/pricing

      I guess only they are allowed to make money, not Docker.

    • ttouchMay 2026

      there are a couple and have very good reputation - though I've never used them

      https://www.blacksmith.sh/ and https://runs-on.com/

      They also say that they're much cheaper than github

    • tempayMar 2026

      This is basically the premise of https://www.blacksmith.sh/ as far as I know, though without the need to host the hardware yourself and the potential complexity they comes with that.

    • tsaifuDec 2025

      Related: Github Actions control plane is no longer free https://news.ycombinator.com/item?id=46291500 https://www.blacksmith.sh/blog/actions-pricing

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