GitHub Actions vs CircleCI vs GitLab CI: CI/CD Platforms (2026)

TL;DR

GitHub Actions is the CI/CD built into GitHub — YAML workflows, marketplace with 20K+ actions, matrix builds, integrated with Issues/PRs, free for public repos. CircleCI is the performance-focused CI/CD — fast builds, advanced caching, orbs (reusable packages), Docker layer caching, SSH debugging. GitLab CI is the all-in-one DevOps CI/CD — built into GitLab, Auto DevOps, container registry, security scanning, the most complete built-in DevOps pipeline. In 2026: GitHub Actions for GitHub-hosted projects, CircleCI for performance-critical pipelines, GitLab CI for full DevOps lifecycle.

Key Takeaways

• GitHub Actions: Most popular — 20K+ marketplace actions, free for public repos
• CircleCI: Fastest builds — advanced caching, Docker layer caching, SSH debug
• GitLab CI: Most complete — built-in registry, security scanning, Auto DevOps
• GitHub Actions has the largest ecosystem of reusable actions
• CircleCI has the best caching and parallel execution
• GitLab CI includes features others charge for (SAST, DAST, container scanning)

---

GitHub Actions

GitHub Actions — CI/CD for GitHub:

Basic Node.js workflow

# .github/workflows/ci.yml
name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [18, 20, 22]

    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: "pnpm"

      - run: pnpm install --frozen-lockfile
      - run: pnpm run lint
      - run: pnpm run typecheck
      - run: pnpm run test --coverage

      - uses: actions/upload-artifact@v4
        if: matrix.node-version == 20
        with:
          name: coverage
          path: coverage/

  build:
    runs-on: ubuntu-latest
    needs: test
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: "pnpm"
      - run: pnpm install --frozen-lockfile
      - run: pnpm run build

Deploy workflow

# .github/workflows/deploy.yml
name: Deploy

on:
  push:
    branches: [main]

concurrency:
  group: deploy-${{ github.ref }}
  cancel-in-progress: true

jobs:
  deploy:
    runs-on: ubuntu-latest
    environment: production
    permissions:
      contents: read
      deployments: write

    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: "pnpm"

      - run: pnpm install --frozen-lockfile
      - run: pnpm run build

      - name: Deploy to Cloudflare Pages
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          command: pages deploy dist --project-name=pkgpulse

Reusable workflows

# .github/workflows/reusable-test.yml
name: Reusable Test

on:
  workflow_call:
    inputs:
      node-version:
        required: false
        type: string
        default: "20"

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: ${{ inputs.node-version }}
          cache: "pnpm"
      - run: pnpm install --frozen-lockfile
      - run: pnpm test

# Usage in another workflow:
# jobs:
#   call-tests:
#     uses: ./.github/workflows/reusable-test.yml
#     with:
#       node-version: "22"

---

CircleCI

CircleCI — performance-focused CI/CD:

Basic config

# .circleci/config.yml
version: 2.1

orbs:
  node: circleci/node@5.2

executors:
  node-executor:
    docker:
      - image: cimg/node:20.11
    resource_class: medium

jobs:
  test:
    executor: node-executor
    parallelism: 4
    steps:
      - checkout
      - node/install-packages:
          pkg-manager: pnpm
      - run:
          name: Lint
          command: pnpm run lint
      - run:
          name: Type Check
          command: pnpm run typecheck
      - run:
          name: Test (parallel)
          command: |
            TESTS=$(circleci tests glob "tests/**/*.test.ts" | circleci tests split --split-by=timings)
            pnpm run test $TESTS
      - store_test_results:
          path: test-results
      - store_artifacts:
          path: coverage

  build:
    executor: node-executor
    steps:
      - checkout
      - node/install-packages:
          pkg-manager: pnpm
      - run: pnpm run build
      - persist_to_workspace:
          root: .
          paths: [dist]

  deploy:
    executor: node-executor
    steps:
      - attach_workspace:
          at: .
      - run:
          name: Deploy
          command: npx wrangler pages deploy dist

workflows:
  ci-cd:
    jobs:
      - test
      - build:
          requires: [test]
      - deploy:
          requires: [build]
          filters:
            branches:
              only: main

Advanced caching

jobs:
  test:
    executor: node-executor
    steps:
      - checkout

      # Restore multiple caches:
      - restore_cache:
          keys:
            - deps-v1-{{ checksum "pnpm-lock.yaml" }}
            - deps-v1-

      - run: pnpm install --frozen-lockfile

      - save_cache:
          key: deps-v1-{{ checksum "pnpm-lock.yaml" }}
          paths:
            - node_modules
            - ~/.pnpm-store

      # Docker layer caching (paid feature):
      - setup_remote_docker:
          docker_layer_caching: true

      - run: docker build -t pkgpulse .

Orbs (reusable packages)

version: 2.1

orbs:
  node: circleci/node@5.2
  aws-cli: circleci/aws-cli@4.1
  slack: circleci/slack@4.12

jobs:
  deploy:
    executor: node-executor
    steps:
      - checkout
      - node/install-packages:
          pkg-manager: pnpm
      - run: pnpm run build
      - aws-cli/setup
      - run:
          name: Deploy to S3
          command: aws s3 sync dist/ s3://pkgpulse-prod/
      - slack/notify:
          event: pass
          template: basic_success_1

---

GitLab CI

GitLab CI — all-in-one DevOps CI/CD:

Basic pipeline

# .gitlab-ci.yml
stages:
  - test
  - build
  - deploy

variables:
  NODE_VERSION: "20"

default:
  image: node:${NODE_VERSION}
  cache:
    key:
      files:
        - pnpm-lock.yaml
    paths:
      - node_modules/
      - .pnpm-store/

test:
  stage: test
  script:
    - corepack enable
    - pnpm install --frozen-lockfile
    - pnpm run lint
    - pnpm run typecheck
    - pnpm run test --coverage
  coverage: '/All files[^|]*\|[^|]*\s+([\d\.]+)/'
  artifacts:
    reports:
      coverage_report:
        coverage_format: cobertura
        path: coverage/cobertura-coverage.xml
      junit: test-results/junit.xml

build:
  stage: build
  script:
    - corepack enable
    - pnpm install --frozen-lockfile
    - pnpm run build
  artifacts:
    paths:
      - dist/
    expire_in: 1 week

deploy:
  stage: deploy
  script:
    - npx wrangler pages deploy dist
  environment:
    name: production
    url: https://pkgpulse.com
  rules:
    - if: $CI_COMMIT_BRANCH == "main"

Security scanning

# Built-in security scanning:
include:
  - template: Security/SAST.gitlab-ci.yml
  - template: Security/Dependency-Scanning.gitlab-ci.yml
  - template: Security/Secret-Detection.gitlab-ci.yml
  - template: Security/Container-Scanning.gitlab-ci.yml

# These run automatically:
# - SAST: Static Application Security Testing
# - Dependency scanning: Check npm for vulnerabilities
# - Secret detection: Find leaked secrets
# - Container scanning: Scan Docker images

Multi-environment

stages:
  - test
  - build
  - deploy-staging
  - deploy-production

deploy-staging:
  stage: deploy-staging
  script:
    - npx wrangler pages deploy dist --branch staging
  environment:
    name: staging
    url: https://staging.pkgpulse.com
  rules:
    - if: $CI_MERGE_REQUEST_ID

deploy-production:
  stage: deploy-production
  script:
    - npx wrangler pages deploy dist
  environment:
    name: production
    url: https://pkgpulse.com
  rules:
    - if: $CI_COMMIT_BRANCH == "main"
  when: manual  # Require manual approval

Child pipelines and includes

# .gitlab-ci.yml
include:
  - local: .gitlab/ci/test.yml
  - local: .gitlab/ci/build.yml
  - local: .gitlab/ci/deploy.yml
  - project: 'shared/ci-templates'
    ref: main
    file: '/templates/node-pipeline.yml'

# Dynamic child pipelines:
generate-pipeline:
  stage: prepare
  script:
    - node scripts/generate-ci.js > child-pipeline.yml
  artifacts:
    paths:
      - child-pipeline.yml

run-dynamic:
  stage: test
  trigger:
    include:
      - artifact: child-pipeline.yml
        job: generate-pipeline

---

Feature Comparison

Feature	GitHub Actions	CircleCI	GitLab CI
Built into	GitHub	Standalone	GitLab
Config format	YAML	YAML	YAML
Marketplace/Orbs	20K+ actions	3K+ orbs	Templates
Matrix builds	✅	✅	✅ (parallel)
Parallel tests	✅ (matrix)	✅ (split by timing)	✅ (parallel keyword)
Caching	✅ (actions/cache)	✅ (advanced)	✅
Docker layer cache	❌	✅ (paid)	✅
SSH debugging	❌	✅	❌
Self-hosted runners	✅	✅	✅
Security scanning	✅ (marketplace)	✅ (orbs)	✅ (built-in SAST/DAST)
Container registry	✅ (GHCR)	❌	✅ (built-in)
Environments	✅	✅	✅
Manual approvals	✅	✅	✅
Reusable workflows	✅	✅ (orbs)	✅ (includes)
Free tier	2K min/month	6K credits/month	400 min/month

---

When to Use Each

Use GitHub Actions if:

• Your code is on GitHub (tightest integration)
• Want the largest marketplace of reusable actions
• Building open-source projects (free unlimited minutes)
• Need simple-to-complex workflows with YAML

Use CircleCI if:

• Need the fastest CI/CD builds with advanced caching
• Want test splitting by timing for parallel execution
• Need SSH debugging into failed builds
• Building performance-critical pipelines

Use GitLab CI if:

• Using GitLab for source control
• Want built-in security scanning (SAST, DAST, dependency)
• Need a complete DevOps platform (CI + registry + monitoring)
• Want Auto DevOps for convention-based pipelines

---

Methodology

Feature comparison based on GitHub Actions, CircleCI, and GitLab CI platforms and pricing as of March 2026.

Compare DevOps tooling and CI/CD libraries on PkgPulse →