Caddy vs Semaphore

What Caddy is

Caddy is a web server that obtains and renews TLS certificates automatically, with a configuration file most people can read.

What Semaphore is

Semaphore is a CI/CD platform offered as a managed cloud service, a free open-source Community Edition and a commercial self-hosted Enterprise Edition. Cloud pipelines are stored as YAML under .semaphore, can use hosted or self-hosted agents, and are billed from compute, storage, transfer and optional support usage rather than one flat subscription.

What Semaphore is built to do

YAML pipelines

Connects dependency-aware blocks and jobs from files in the .semaphore directory.

Hosted and self-hosted agents

Runs jobs on listed cloud machines or customer-managed agent capacity.

Secrets

Injects governed environment variables or files into selected jobs and pipelines.

Promotions

Chains pipelines into release and deployment workflows with configurable conditions.

Choose Caddy if

• Anyone who wants a correctly configured HTTPS server without ceremony.

Choose Semaphore if

• Teams versioning multi-stage build, test and deployment workflows in YAML
• Workloads that benefit from mixing hosted compute with customer-managed agents
• Organizations able to forecast compute minutes, artifact usage and support needs

Skip Semaphore if

• Hosted Windows workers are required and self-hosting is not acceptable
• Your procurement process requires a single fixed all-inclusive price
• No owner can maintain pipeline YAML, secrets, agents and usage controls

Caddy: pros & cons

• HTTPS configured correctly by default
• Configuration is short and legible
• Single binary, easy to deploy
• Smaller community than nginx
• Fewer third-party guides
• Some advanced setups need plugins

Semaphore: pros & cons

• Deployment choice: Offers managed cloud, open-source Community Edition and commercial self-hosted editions.
• Repository pipelines: Defines connected blocks, dependencies, jobs and promotions in versioned YAML files.
• Execution options: Cloud supports Linux, Docker and macOS agents, while self-hosted agents add customer-controlled machines.
• Usage visibility: Current pricing publishes per-minute compute and separate artifact allowances and overages.
• Variable monthly cost: Machine minutes, artifact transfer, storage and optional services can all affect spend.
• Platform boundary: Hosted Windows jobs are not listed; Windows is documented through self-hosted agents.
• Operational burden shifts: Community or self-hosted deployment requires the customer to operate its own CI infrastructure.
• Support tiers are separate: Advanced troubleshooting, response commitments and engineering assistance are paid additions.