GitHub Actions vs Jenkins vs GitLab CI: A Developer's Honest Comparison (2026) This article is a technical rewrite of the original comparison published at akoode.com . Code examples and architecture breakdowns added for Dev.to readers. I've set up pipelines on all three. Migrated a team off Jenkins to GitHub Actions. Watched a startup pick GitLab CI because the security scanning was bundled. Watched another stay on Jenkins because their infra literally couldn't reach the internet. Here's the honest breakdown — no vendor spin, just the practical trade-offs. The Core Philosophical Difference Before the feature tables, get this mental model right: GitHub Actions — pipeline-as-code that lives inside your repo , triggered by GitHub events. No server to manage. Jenkins — a self-hosted automation server you fully control. Maximum flexibility, maximum maintenance cost. GitLab CI — pipeline engine inside a complete DevOps platform . If you want one tool for code + CI + security scanning + registry, this is it.…