Compare / Semaphore vs Buildkite

Semaphore vs Buildkite

Buildkite pricing combines active users, agent usage, test executions and hosted compute. Semaphore charges direct per-minute compute, with no per-user or per-test fees. This page compares them on speed, cost, self-hosting and debugging.

Updated November 2026

At a glance

Config side by side

The same Node.js test pipeline in both tools.

steps:
  - label: "Test"
    command:
      - npm ci
      - npm test
    plugins:
      - docker#v5.11.0:
          image: node:20

version: v1.0
name: CI
agent:
  machine:
    type: f1-standard-2
    os_image: ubuntu2404
blocks:
  - name: Test
    task:
      jobs:
        - name: npm test
          commands:
            - checkout
            - sem-version node 20
            - npm ci
            - npm test

Migrating

Install the sem-ai CLI, then ask your coding agent to translate the pipeline. Run both side by side before you switch.

$ curl -fsSL https://raw.githubusercontent.com/semaphoreio/sem-ai/main/install.sh | sh

# Claude Code
/plugin marketplace add semaphoreio/sem-ai
/plugin install sem-ai@semaphoreio

# Codex
codex plugin marketplace add semaphoreio/sem-ai
codex plugin add sem-ai@semaphoreio

# then ask your agent:
# "Move this Buildkite workflow to Semaphore and run both pipelines for comparison."

1. Pick one representative pipeline.
2. The agent translates .buildkite/pipeline.yml to .semaphore/semaphore.yml.
3. Choose where it runs: Cloud, Community Edition or Enterprise Edition.
4. Run both in parallel and compare speed, reliability and cost.

When Buildkite fits better

• You already operate a large self-hosted agent fleet and like that model.
• You want orchestration hosted by the vendor but every build on your own hardware.

FAQ