Blacksmith

We’ve raised our $10M Series A, led by Google Ventures. Meet Blacksmith.

3.7M jobs and $511K in compute, nbd

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.

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

Cached. Loaded. Shipping soon.

Wrote about how we managed to pull it off: blacksmith.sh/blog/cache

One of the most fun projects we've shipped to date was reverse engineering github actions cache to make it up to 10x faster

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.

(we didn't pay for this post we just really like when people write about us)

@_howardjohn switched to Blacksmith and his E2E tests went from 10 min to 2 blog.howardjohn.info/posts/blacksmi…

@gajesh Hey Gajesh! This step just grants access to your email so we can log you in. Later on you can pick which specific repos you want to grant us access to as you onboard, feel free to DM if you get blocked

@useblacksmith any way to use it without giving full account access?

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.

Congrats to @FactoryAI on their Series C! Stoked to keep building with you 🏭

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.

Read about how we shipped this in 3 weeks: blacksmith.sh/blog/how-we-sh…

2-4x faster builds across the board, almost here

We do feed our people well

A single customer with a spiky workload hurts utilization. Hundreds of them smoothen it out. The math behind running a CI cloud is pretty counterintuitive. We break it down here: blacksmith.sh/blog/the-econo…

Switched from @github runners to @useblacksmith almost 2 months ago, now have the first full month of data. No joke: our CI run time is down 75% (faster) and cost is down 92% (cheaper). Unbelievable!

Man, @useblacksmith testboxes are so good. - Reproducible CI test environment - Long-lived: get your agent to run a bunch of E2E tests with 1 warmup - Fast