Semaphore vs BUILDKITE
Stop stacking CI charges. Pay for the compute you use.
Buildkite pricing can combine active users, agent usage, test executions, and hosted compute. Semaphore uses direct per-minute compute pricing without separate per-user or per-test-monitoring charges.
Every org gets $15 of free usage every month · No signup form · Your coding agent sets it up
Teams that moved off CIRCLE CI to Semaphore
How Buildkite usage becomes a bill
Buildkite’s model can suit teams that want its control plane, agent architecture, and Test Engine. It can also combine several independent pricing meters.
Avtive users
The Pro plan is listed at $30 per active user each month.
Semaphore: No separate per-user charge.
Agent usage
Pro includes 10 self-hosted agents. Additional agents are charged at $3.50 per agent per month based on P95 usage.
Semaphore: 20 concurrent jobs included by default.
Test executions
Pro includes 1 million test executions per month, then charges $15 per additional million.
Semaphore: No separate per-test execution meter.
Hosted compute
Buildkite hosted Linux and Mac agents are charged per vCPU minute and machine shape.
Semaphore: Direct per-minute machine prices.
Fleet operations
Self-hosted teams provision, secure, update, and scale the agent fleet.
Semaphore: Choose managed Cloud when you do not want a fleet.
Control-plane boundary
Buildkite’s self-hosted agents use Buildkite’s hosted orchestration layer.
Semaphore: Self-host the complete CI/CD platform with CE or EE.
Faster in the tested workload. Lower measured job cost.
Semaphore’s vendor-run result is a reason to test your own production-shaped pipeline, not a universal promise.
Lower is better. March 2026 controlled benchmark.
Model your full bill. Workload and machine differences matter.
A REAL DEPLOYMENT CHOICE
Managed Cloud or the complete platform on your infrastructure.
Semaphore self-hosting is not limited to execution agents attached to a vendor control plane. Community Edition and Enterprise Edition run the CI/CD platform itself in your environment.
- Semaphore Cloud · fully managed CI/CD
- Community Edition · free, open source, fully self-hosted
- Enterprise Edition · behind your firewall
- No Semaphore Cloud dependency for CE or EE
semaphoreio/sem-ai/main/install.sh | sh
and run both pipelines for comparison.”
Move one workflow.
Measure the complete cost.
Keep source control, pull requests, and code review where they are. Translate one production-shaped YAML workflow and compare both systems with your own data.
Include jobs, caches, artifacts, secrets, plugins, tests, and deployment gates.
Move from .buildkite/pipeline.yml to
.semaphore/semaphore.yml.
Test on managed Cloud, self-hosted Community Edition, or Enterprise.
Measure speed, reliability, diagnosis time, and cost per successful pipeline.
Semaphore and Buildkite at a glance
A focused view of the pricing, configuration, and deployment boundaries that matter during evaluation.
| Capability | Semaphore | Buildkite |
|---|---|---|
| Pipeline configuration |
.semaphore/semaphore.yml + visual editor
|
.buildkite/pipeline.yml + dynamic uploads
|
| Primary pricing | Direct per-minute compute | Active users + usage charges |
| Concurrency | 20 concurrent jobs included | Agent allowance and additional agent pricing |
| Test monitoring | No separate per-test execution charge | Included executions, then per-million pricing |
| Hosted compute | Per-minute machine pricing | Per-vCPU-minute pricing |
| Complete self-hosting | Open-source CE and behind-firewall EE | Hosted control plane with customer agents |
| Benchmark result | 5m 01s · $0.04/job | 7m 15s · $0.09/job |
| Debugging | Real-time logs + SSH | Logs, annotations, agent tooling |
Important context: Buildkite supports sophisticated pipeline patterns, custom environments, agent queues, dynamic pipeline uploads, Test Engine, and hosted Linux and Mac agents. This comparison focuses on pricing and deployment boundaries.
Get started
Tell your agent what you want.
It runs your CI.
curl -fsSL https://raw.githubusercontent.com/semaphoreio/sem-ai/main/install.sh | sh/plugin marketplace add semaphoreio/sem-ai/plugin install sem-ai@semaphoreiocodex plugin marketplace add semaphoreio/sem-aicodex plugin add sem-ai@semaphoreioThen ask your agent to set things up — it connects to your org, and you start with $15 of free usage every month. No signup form.