@useblacksmith profile picture
Blacksmith @useblacksmith

The fastest way to run your GitHub Actions. Trusted by @supabase, @trychroma, @clerk and 1000 others.

Joined January 2024
  • Posts 761
  • Following 7
  • Followers 5,729
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Blacksmith
 @useblacksmith
18 Sep 2025
We’ve raised our $10M Series A, led by Google Ventures. Meet Blacksmith.
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the fastest bus in SF is out there. it's just too fast to pose for us. snap a better pic, @ us and we'll drop you a pile of build minutes.
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Daytona
 @daytonaio
Jun 24
Packed house at @daytonaio AI Builders NYC with @Oracle & @datadoghq🗽 Great talks on AI agents, evaluations, cloud infrastructure, observability, CI, and browser automation from teams at @Oracle, @datadogdevs, @useblacksmith, @AnchorBrowser & @daytonaio. Thanks to everyone who joined us yestrday at @datadoghq HQ. More to come... 🚀
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congrats to momentic on the launch 💛 proud to see the best companies ship with Blacksmith
wei-wei
 @wuweiweiwu
Jun 23
AI writes all your code. Does it still work? That's the gap: coding agents are scaling output, but the same with bugs and incidents. The biggest bottleneck is QA: how can you make sure the code your agents just wrote doesn’t break everything? The best QA are the ones who know everything about your product. Today, we give that knowledge to Momentic’s most capable agent. Every Linear ticket, every PRD in Notion, every PR - Momentic knows all. In just the past few weeks, our agents analyzed 70k test failures and created 600 tests. Achieving a 73% PR merge rate, and it’s growing fast. We’re grateful for the trust of our customers, including Notion, Xero, Webflow, Retool, Runway, Bilt, and more.
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Ryan Carson
 @ryancarson
Jun 11
God damn. Just cut our builds from 6 min -> 2 min with one line of code. Thank you @useblacksmith Not being paid to say this. Now that I'm shipping ~55 PRs/day, this saves us SO much time. (and thx @theo for the heads up)
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peep the blog 👀 conda-forge.org/blog/2026/06…

New large runners available for GitHub Actions | conda-forge | community-driven packaging for conda

In March, we were notified that the colocation where the open-gpu-server CI was running was going to be decommissioned. This meant no GPU CI jobs and no long-running CPU jobs. Fortunately, we could...

conda-forge.org
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another day, another OSS repo running 2x faster on Blacksmith for free who should we sponsor next?
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ccusage @cc_usage
Jun 10
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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James Ross
 @CherryJimbo
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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筋と憎悪，もののけ王
 @ubugeeei
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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spotted in SF doing free advertising for the tire shop
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Aditya Jayaprakash
 @adijayaprakash
May 27
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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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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very cool build🦞
Peter Steinberger 🦞
 @steipete
May 10
Built BlackBar, a menubar for @useblacksmith black.bar
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3.7M jobs and $511K in compute, nbd
Peter Steinberger 🦞
 @steipete
Apr 29
And people think tokens are expensive... this is @useblacksmith (they sponsor OpenClaw, 🫶🦞)
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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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Aayush Shah
 @aayush_shah15
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
Peter Steinberger 🦞
 @steipete
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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Cached. Loaded. Shipping soon.
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Wrote about how we managed to pull it off: blacksmith.sh/blog/cache

Reverse engineering GitHub Actions cache to make it fast | Blacksmith

We reverse engineered GitHub Actions cache internals to transparently route cache requests through our faster, colocated cache. This delivered up to 10x faster cache performance for some of our...

blacksmith.sh
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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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Peter Steinberger 🦞
 @steipete
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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