The fastest way to run your GitHub Actions. Trusted by @supabase, @trychroma, @clerk and 1000 others.
Joined January 2024
- Tweets 754
- Following 7
- Followers 5,485
- Likes 900
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Pinned Tweet
18 Sep 2025
We’ve raised our $10M Series A, led by Google Ventures.
Meet Blacksmith.
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Our next big sponsor is @useblacksmith!!!
Blacksmith provides a CI/CD pipeline with massive performance.
Recently, we migrated ccusage from TypeScript to Rust & Nix, so all jobs slowed down. Thanks to Blacksmith, our CI is now way faster!
Can't wait to ship things fast!
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Blacksmith retweeted
Jun 2
We've been experimenting with all kind of exotic caching solutions, different containers, etc. to make our builds testing suites faster in GitHub Actions.
Then a couple weeks ago we just tried @useblacksmith and it was like 3-4x faster with zero effort. I think I'm sold.
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Blacksmith retweeted
May 31
vizejs.dev の CI が本当に 2 倍早くなった．
ありがとう @useblacksmith
Before: 8m 45s
After: 4m 26s
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Blacksmith retweeted
Blacksmith is part of @Redpoint's 2026 InfraRed 100 today.
We started Blacksmith because CI needed its own cloud. Just over two years later, we're running millions of CI jobs every day for some of the fastest-growing companies.
The same primitives we built to power CI will power much more than just CI.
There’s a lot more coming :)
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May 27
Blacksmith has been named to @Redpoint's 2026 InfraRed 100!
We're building developer infrastructure to help devs (and agents) move faster.
redpoint.com/infrared/100/
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May 10
very cool build🦞
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Apr 29
3.7M jobs and $511K in compute, nbd
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Apr 28
We got rid of the most mind-numbing step in CI.
With Container Caching, you no longer need to spend time pulling your images from your registry since they're already loaded at the start of every job.
Minutes back on every run, now available on Blacksmith.
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Blacksmith retweeted
Apr 27
another underrated testbox use case: get agents to stress a flaky test across a dozen blacksmith VMs in parallel and let them hammer away until the cause is understood and deflaked.
latest coding models are great at this kind of long-horizon work
Apr 27
Been so CPU-constrained on OpenClaw work. Switched local tests running to @useblacksmith and IT IS SO GOOD. codex can literally spin up to 32vCPU instances and rip through our test suite. docs.blacksmith.sh/blacksmit…
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Apr 23
One of the most fun projects we've shipped to date was reverse engineering github actions cache to make it up to 10x faster
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Blacksmith retweeted
Apr 22
Did some work to get our CI times down from 8 to two minutes via some... parallelization. Kudos to the @useblacksmith folks for sponsoring letting us melt their servers.
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Apr 20
@_howardjohn switched to Blacksmith and his E2E tests went from 10 min to 2
blog.howardjohn.info/posts/b…
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Apr 20
(we didn't pay for this post we just really like when people write about us)
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Blacksmith retweeted
We've been getting asked about Mac runners a bunch. Today they're live on Blacksmith.
Funny timing: one of our customers ran on Cirrus, which got acquired by OpenAI and shut down last week. We already had runners in production and got them migrated on the same day.
Apr 16
Blacksmith Mac Runners are here.
M4 Pro chips. Local NVMe storage. 2-4x faster builds vs. GitHub-hosted runners.
If you're building for Apple, your CI just got a serious upgrade.
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Apr 16
Blacksmith Mac Runners are here.
M4 Pro chips. Local NVMe storage. 2-4x faster builds vs. GitHub-hosted runners.
If you're building for Apple, your CI just got a serious upgrade.
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