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Cloud · head to head

Caddy vs WarpBuild

Caddy logo

Caddy

Cloud

Web server with automatic HTTPS by default

From
Free
Rated
-
Full reviewWebsite
WarpBuild logo

WarpBuild

Developer Tools

2x faster, 50% cheaper GitHub Actions runners

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Caddy has a free tier, so it costs nothing to try first.
  • Each has a real cost: Caddy smaller ecosystem than Nginx, so third-party guides and modules are fewer; WarpBuild per-minute pricing requires tracking usage to estimate monthly costs
  • They diverge on capability: Caddy covers Automatic HTTPS, WarpBuild covers Optimized runner infrastructure.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Caddy and WarpBuild actually diverge.

Attributes where Caddy and WarpBuild differ
AttributeCaddyWarpBuild
Starting priceFreeOn request
Pricing modelOpen source, no licence feeUsage-based per minute, varies by runner configuration
Free tierYesNo
PlatformsLinux, macOS, Windows, DockerGitHub Actions, Linux, Windows, macOS, Cloud
CategoryCloudDeveloper Tools

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Caddy

  • Automatic HTTPS
  • Caddyfile
  • Reverse proxy
  • Single binary

Only in WarpBuild

  • Optimized runner infrastructure
  • Intelligent caching
  • Incremental builds
  • Multi-architecture support
  • Unlimited concurrency
  • Autoscaling
  • BYOC support
  • Docker builders

What people use each for

The jobs each tool is most often brought in to do.

Caddy

  • Sites and services where expired certificates have caused outages beforenot WarpBuild
  • Small deployments where Nginx configuration is more effort than the problem warrantsnot WarpBuild
  • Reverse proxying internal services with TLS without a certificate workflownot WarpBuild

WarpBuild

  • Accelerating CI builds for teams with high test volumesnot Caddy
  • Running tests generated by AI coding assistants efficientlynot Caddy
  • Reducing GitHub Actions costs by 50% or morenot Caddy
  • Supporting teams that need ARM64 architecture runnersnot Caddy

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Caddy

  • Smaller ecosystem than Nginx, so third-party guides and modules are fewer
  • Adding plugins means rebuilding the binary rather than loading a module
  • Under very high throughput Nginx generally still benchmarks ahead
  • Automatic certificate issuance needs outbound internet access, which complicates air-gapped deployments

WarpBuild

  • Per-minute pricing requires tracking usage to estimate monthly costs
  • Large configuration runners (32 vCPU) expensive at $0.064/min
  • macOS M4 Pro 12-core at $0.16/min is highest-cost option
  • BYOC option requires cloud setup by customer

Pricing, plan by plan

Caddy

Free
  • CaddyFree
    • Full functionality
    • Commercial use permitted
    • Community support

WarpBuild

On request
  • Linux x86-64 (2vCPU, 8GB)$0.004/minute
    • 2 vCPU
    • 8 GB RAM
    • Standard performance
  • Linux x86-64 (4vCPU, 16GB)$0.008/minute
    • 4 vCPU
    • 16 GB RAM
    • Increased performance
  • Linux x86-64 (8vCPU, 32GB)$0.016/minute
    • 8 vCPU
    • 32 GB RAM
    • High performance
  • Linux x86-64 (16vCPU, 64GB)$0.032/minute
    • 16 vCPU
    • 64 GB RAM
    • Enterprise performance

Which should you pick?

Choose Caddy if

  • You need automatic https.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker.
  • You also want caddyfile.
Caddy review

Choose WarpBuild if

  • You need optimized runner infrastructure.
  • You work on GitHub Actions, Linux, Windows, macOS, Cloud.
  • You also want intelligent caching.
WarpBuild review

Questions people ask

Is Caddy or WarpBuild better?
Neither clearly leads. Caddy starts at Free and WarpBuild at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Caddy or WarpBuild?
Caddy has a free tier; the other does not. Paid plans start at Free for Caddy and On request for WarpBuild.
Does Caddy or WarpBuild run on more platforms?
Caddy runs on Linux, macOS, Windows, Docker. WarpBuild runs on GitHub Actions, Linux, Windows, macOS, Cloud.
Can I use Caddy for free?
Yes. Caddy has a free tier, so you can try it without paying. WarpBuild starts at On request.
What is Caddy best used for?
Caddy is most often used for sites and services where expired certificates have caused outages before, small deployments where nginx configuration is more effort than the problem warrants, reverse proxying internal services with tls without a certificate workflow. Of those, sites and services where expired certificates have caused outages before and small deployments where nginx configuration is more effort than the problem warrants are not what WarpBuild is typically brought in for.
What can Caddy do that WarpBuild cannot?
Caddy covers Automatic HTTPS, Caddyfile, Reverse proxy, Single binary. WarpBuild covers Optimized runner infrastructure, Intelligent caching, Incremental builds, Multi-architecture support.

Answered from the vendors’ own pages

Caddy: Is Caddy free?

Yes, open source under the Apache 2.0 licence, free for commercial use.

WarpBuild: How much cheaper is WarpBuild compared to GitHub Actions?

WarpBuild offers approximately 50% cost savings compared to GitHub-hosted runners. For example, Linux x86-64 2vCPU/8GB costs $0.004/min with WarpBuild vs $0.008/min with GitHub Actions.

Source
Caddy: What does automatic HTTPS mean?

Caddy obtains certificates from Let’s Encrypt or ZeroSSL on first request and renews them before expiry, with no cron job or configuration.

WarpBuild: What is BYOC and how does it differ from managed runners?

BYOC (Bring Your Own Cloud) allows customers to run WarpBuild on their own cloud infrastructure at $0.002/min. Managed runners use WarpBuild's cloud infrastructure. BYOC provides lower costs but requires customer setup.

Source
Caddy: Caddy or Nginx?

Caddy is dramatically simpler to configure and removes certificate management. Nginx has the larger ecosystem and better peak throughput.

WarpBuild: Does WarpBuild support ARM64 runners?

Yes, WarpBuild offers ARM64 runners at lower costs than x86-64. Linux ARM64 starts at $0.003/min for 2vCPU/8GB configuration.

Source
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