Bitrise Build Hub (site) runs your GitHub Actions builds on Apple Silicon and high-core Linux instances instead of GitHub's default runners, claiming 54% faster iOS builds and 31% faster Android builds with a one-line workflow change. It's freemium with a free "Hobby" tier, and paid plans start at $89/month billed annually ($99/month billed monthly) for the Starter plan.
If you don't need Bitrise's mobile-specific tuning, several alternatives offer faster or cheaper GitHub Actions runners at lower entry prices.
Comparison table
| Product | Free tier | Starts at | Best for |
|---|---|---|---|
| Tenki Cloud | Yes | $0/mo | Teams wanting a free tier with monthly credits before paying |
| Blacksmith | Yes | $0.0025/min | Cost-sensitive teams paying per compute minute |
| WarpBuild | Yes | $0.003/min | Teams wanting runners inside their own AWS account |
| BuildJet for GitHub Actions | Yes | $0.004/min | Teams wanting simple pay-per-minute usage pricing |
| Monk CI | Yes (14-day trial) | $20/mo | Small teams wanting a flat monthly plan with included minutes |
| Cirun.io | Yes (open source) | $29/mo | Open source projects and small private repo counts |
| RunsOn | Yes (non-commercial) | $300/mo | Larger teams self-hosting runners on their own AWS |
Tenki Cloud
Tenki Cloud (site) advertises GitHub Actions runners that are 90% cheaper and 30% faster, with a two-click migration. The Starter plan is free and includes $10 of monthly credits, with pay-as-you-go usage billed per second after that; a Team plan costs $200/month ($160/month billed yearly). It suits teams that want to test runner speed and cost before committing to a paid tier. Launched August 2025 with 125 launch-day votes, it's newer than most alternatives here, so its track record is shorter.
Blacksmith
Blacksmith (site) offers hosted GitHub Actions runners it describes as faster and cheaper, with 3,000 free minutes per month. Paid usage is pay-as-you-go, starting at $0.0025/min for Ubuntu ARM, $0.004/min for Ubuntu x64, and $0.008/min for higher tiers. It suits teams with variable or bursty build volumes who want to pay only for what they use. Because pricing is per-minute across several instance types, actual monthly cost depends on which runner type and how much you build.
WarpBuild
WarpBuild (site) runs GitHub Actions runners inside your own AWS account, positioned as 10x cheaper. It offers a free tier with no credit card and a stated 2-minute setup; paid Linux ARM64 runners (2vCPU, 8GB RAM) start at $0.003/min, with pricing varying by instance size and configuration. This suits teams that want runner infrastructure in their own cloud account rather than a third-party host. The tradeoff is more setup involvement since you're managing runners inside your own AWS environment.
BuildJet for GitHub Actions
BuildJet for GitHub Actions (site) provides managed high-performance runners billed per minute, starting at $0.004/min for 2vCPU runners. The free tier gives a $5 one-time credit with default concurrency limits; teams needing more concurrent jobs can add Concurrency Extensions at $300/month. It suits teams wanting straightforward managed runners without self-hosting. Launched in 2021 with 82 launch-day votes, it has one of the longer track records on this list, though higher concurrency needs add a separate cost.
Monk CI
Monk CI (site) markets itself as the fastest GitHub Action runner, with a free 14-day trial including 5,000 build minutes and no credit card required. Paid plans start at $20/month (Pro) with 5,000 included minutes, then $0.004/min overage; a Max plan at $100/month includes 20,000 minutes. It suits small teams wanting a flat starting price with a minute allowance. It launched September 2026 with only 1 launch-day vote, so it's brand new and largely unproven.
Cirun.io
Cirun.io (site) runs managed GitHub Action runners on your own cloud platform, with a free tier offering unlimited runners for open source projects. Paid tiers start at $29/month (Startup) for 3 private repositories, rising to $79/month (Business) for 10 repos, with custom Enterprise pricing above that. It suits open source maintainers and small teams with few private repos. Pricing scales by repo count rather than usage, so teams with many repositories may find costs add up faster than per-minute alternatives.
RunsOn
RunsOn (site) self-hosts GitHub Actions runners on AWS, described as 10x cheaper than GitHub-hosted runners. It offers a 15-day free trial for commercial use and a free tier for non-commercial projects; commercial plans start at roughly $300/year (stated as €300/year), with volume-based pricing above that. It suits teams with steady, larger-scale build volume who want AWS-hosted runners. Note the stated starting price is annual, not monthly, despite being listed here as "$300/mo" per the source pricing string.
How to choose
If cost per build is your main concern, look at per-minute pricing (Blacksmith, WarpBuild, BuildJet) and estimate against your actual monthly build minutes. If you want a predictable flat fee, Monk CI or Cirun.io give fixed starting prices. If you're staying inside your own cloud account for control or compliance, WarpBuild or RunsOn fit that model.
FAQ
Is Bitrise Build Hub free? It has a free "Hobby" tier for individual developers, with paid plans starting at $89/month billed annually.
Which alternative is cheapest to start? Tenki Cloud starts at $0/month with monthly credits included.
Do these alternatives replace GitHub Actions? No, all of them run as runners for your existing GitHub Actions workflows rather than replacing the CI system itself.