GitHub Actions vs Concourse CI: Pipelines Comparados

Por Daniel Zoghalchali·Latchkey

Concourse modela tudo como pipelines, recursos e jobs com reprodutibilidade rigorosa; GitHub Actions é um CI integrado e gerenciado.

Concourse CI é um CI self-hosted baseado em containers, com um modelo distinto de recursos/jobs e foco em reprodutibilidade. GitHub Actions é o CI integrado ao GitHub. Aqui está a comparação.

	GitHub Actions	Concourse CI
Config	.github/workflows/*.yml	pipeline.yml (resources + jobs)
Modelo de hospedagem	GitHub-hosted ou self-hosted	Self-hosted (web + workers)
Preço	Por minuto (hosted)	Software gratuito + sua infra
Ecossistema	Grande Actions Marketplace	Tipos de recursos
Alavancas de velocidade	Cache, runners maiores/gerenciados	Dimensionamento de workers, jobs paralelos
Manutenção	Baixa (gerenciado)	Você roda web + workers

Preço e manutenção

Concourse é open-source e gratuito para rodar, mas você opera o nó web e os workers e mantém a disciplina de reprodutibilidade. GitHub Actions remove isso e cobra por minuto.

Configuração e ecossistema

Concourse impõe pipelines limpos e reprodutíveis através do seu modelo de recursos - poderoso, mas com uma curva de aprendizado mais íngreme. O Actions é mais acessível e tem um marketplace muito maior.

Velocidade e runners

Para um CI gerenciado sem rodar workers do Concourse, o GitHub Actions com runners gerenciados (por exemplo, Latchkey) oferece computação barata (~70% abaixo do GitHub-hosted), warm pools e retentativas com autocorreção.

Migrating between CI platforms: what actually costs time

Pipeline syntax is the easy part and the part every comparison focuses on. Budget for it, then expect it to be the smallest line item.
Secrets, OIDC trust relationships, and deploy credentials have to be recreated and re-approved, usually by a different team.
Caching semantics differ enough that a naive port produces a pipeline that is correct and much slower.
Required status checks and branch protection reference check names. Renaming them mid-migration blocks merges until the rules are updated.
Run both in parallel on the same commits until the new one has been green for a full sprint. Cutting over on a green first run is how migrations get rolled back.

O veredito

Escolha Concourse para pipelines self-hosted rigorosos e reprodutíveis com uma equipe de plataforma; escolha GitHub Actions para um CI gerenciado e acessível. Runners gerenciados mantêm o Actions barato e com baixa operação.

Perguntas frequentes

GitHub Actions vs Concourse CI: Pipelines Compared?

Concourse CI is a self-hosted, container-based CI with a distinctive resources/jobs model and a focus on reproducibility. GitHub Actions is integrated CI for GitHub. Here is the comparison.

Pricing and maintenance?

Concourse is open-source and free to run, but you operate the web node and workers and maintain reproducibility discipline. GitHub Actions removes that and bills per minute.

Config and ecosystem?

Concourse enforces clean, reproducible pipelines via its resource model - powerful but a steeper learning curve. Actions is more approachable with a much larger marketplace.

Speed and runners?

For managed CI without running Concourse workers, GitHub Actions with managed runners (e.g. Latchkey) gives cheap compute ($0.0025/min at 2 vCPU vs $0.006 GitHub-hosted), warm pools, and self-healing retries.

Which should I choose?

Choose Concourse for strict, reproducible self-hosted pipelines with a platform team; choose GitHub Actions for approachable managed CI. Managed runners keep Actions cheap and low-ops.

Guias relacionados

GitHub Actions vs Drone CI: Container-Native CIGitHub Actions vs Drone CI compared on pricing, hosting, config, ecosystem, and speed. GitHub Actions Cost Calculator - Estimate & Cut Your CI BillFree GitHub Actions cost calculator: enter your monthly CI minutes and runner size to see your current bill GitHub Actions vs Buildkite: Hybrid CI ComparedGitHub Actions vs Buildkite compared on pricing, hosting, config, and speed.