Blacksmith
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Out-forge your CI.
Blacksmith is a managed runner platform for GitHub Actions with strong caching, migration help, and broad concurrency options.
Blacksmith focuses on being easy to adopt while improving performance and cost compared with GitHub-hosted runners. Its notable strengths include a migration wizard, high-speed caching, ARM support, and additional workflow statistics.
It is worth considering when teams want better CI performance but still prefer a managed service with minimal workflow changes.