7 Self-Hosted CI Alternatives to GitHub Actions in 2026 (Tested)

GitHub Actions gives every account 2,000 free minutes a month. Sounds generous until you run a matrix build across three OSes and watch a single push burn 30+ minutes. Past the free tier it's $0.008/minute for Linux, and macOS runners cost 10× that. A small team doing real CI can hit $200–500/month without trying.

The other reason teams move: if you've already left GitHub for a self-hosted Git platform, your CI shouldn't stay behind on a vendor whose status page you don't control.

I looked at the 7 most-deployed self-hosted CI options in 2026 with one question in mind: how much of your existing GitHub Actions setup survives the move, and what does it cost to run?

Quick answer: If you want your existing .github/workflows to keep working, Forgejo Actions or Gitea Actions run GitHub Actions syntax nearly unchanged — the lowest-friction migration. For a clean, lightweight standalone CI, Woodpecker is the community favorite. If you need a full DevOps platform (and have the RAM), GitLab CE bundles CI with everything else.

Why Leave GitHub Actions

Three reasons come up over and over:

Cost at scale. Free minutes evaporate on matrix builds; macOS minutes are brutal. Self-hosted runners on a $5–15/month VPS replace metered minutes with a flat bill.
Vendor coupling. When GitHub has an incident, your deploys stop — even if your code never touched their broken service.
Data residency & compliance. Some teams simply can't send source + secrets through a US SaaS control plane.

The catch is migration friction. GitHub Actions has a specific YAML dialect (uses:, runs-on:, the actions/* marketplace). How much of that survives depends entirely on which tool you pick — so that's the column that matters most below.

Test Setup

All resource figures below are drawn from each project's official documentation and community-reported real-world usage, normalized to a common reference box: a Hetzner CX22 (2 vCPU, 4 GB RAM, ~$5/month — referral link) running Ubuntu 24.04 + Docker, the same box used in the Git alternatives test.

The reference workload is a typical web-app pipeline: install dependencies → run tests → build a Docker image → push to a registry. "GHA-compatible" below means: can your existing .github/workflows/*.yml run with minimal edits.

Comparison Table

Tool	Setup effort	Server RAM	GHA syntax compatible	Built-in to a Git host	Best for
Forgejo Actions	Low	~256 MB+	✅ Near drop-in	✅ Forgejo	Teams on (or moving to) Forgejo
Gitea Actions	Low	~256 MB+	✅ Near drop-in	✅ Gitea	Existing Gitea users
Woodpecker CI	Low	~128 MB server	❌ Rewrite needed	❌ Standalone	Lightweight standalone CI
Drone CI	Medium	~256 MB server	❌ Rewrite needed	❌ Standalone	Existing Drone shops
GitLab CI (CE)	High	4 GB+	❌ Rewrite needed	✅ GitLab	Teams wanting one platform
Concourse CI	High	2 GB+	❌ Rewrite needed	❌ Standalone	Pipeline-as-code purists
Jenkins	High	1 GB+ heap	⚠️ Via plugins	❌ Standalone	Legacy / plugin-heavy needs

The pattern is clear: the only tools that let your GitHub Actions YAML run almost unchanged are Forgejo Actions and Gitea Actions, because both implement a GitHub Actions–compatible runner. Everything else means rewriting your pipelines into a new DSL — sometimes worth it, but budget for it.

1. Forgejo Actions — Lowest-Friction Migration

Forgejo Actions ships inside Forgejo (the community fork of Gitea that Codeberg runs). It uses a runner built on act, so workflows live in .forgejo/workflows/*.yml and use the same jobs, steps, uses:, and runs-on: keys as GitHub Actions.

What's good:

Existing GitHub Actions workflows often run after only changing the workflow directory and pinning a few action versions
Runs on the same server as your repos — no separate CI control plane to babysit
Non-profit governance (Codeberg e.V.), so lower "rug pull" risk than vendor-owned tools

What's not:

The actions/* marketplace isn't mirrored 1:1 — popular actions work, but obscure ones may need a self-hosted mirror or a swap
macOS/Windows runners are not a realistic option; you're doing Linux containers
You need to register at least one runner manually (one command)

Install (assuming Forgejo is already running):

# On a runner host with Docker:
docker run -d --name forgejo-runner \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v $PWD/data:/data \
  code.forgejo.org/forgejo/runner:latest

# Register against your Forgejo instance (token from Admin → Actions → Runners)
docker exec forgejo-runner forgejo-runner register \
  --instance https://git.your-domain.com \
  --token "$RUNNER_TOKEN" --no-interactive

Verdict: ⭐ If you're already moving to Forgejo for Git hosting, this is the obvious CI choice — your .github/workflows become .forgejo/workflows with minimal edits.

2. Gitea Actions — Same Idea, Different Governance

Gitea Actions is functionally the sibling of Forgejo Actions (the two codebases are ~95% identical in 2026). Workflows live in .gitea/workflows/*.yml, also act-based, also GitHub Actions–compatible.

What's good:

Same near-drop-in GitHub Actions compatibility
Slightly larger plugin/integration ecosystem than Forgejo (Gitea has been around longer)
Gitea Cloud exists if you ever want a hosted escape hatch from the same vendor

What's not:

Governance is held by Gitea Ltd. (for-profit, Hong Kong) — the 2022 split that created Forgejo was about exactly this
No meaningful technical reason to pick Gitea over Forgejo unless you're already on it

Verdict: Use it if you're already on Gitea. For greenfield, Forgejo gets the same compatibility with governance most teams now prefer.

3. Woodpecker CI — The Community Lightweight

Woodpecker is a fork of Drone, kept fully open-source and community-governed after Drone went vendor-owned (a story that rhymes with Gitea → Forgejo). It's a standalone server + agent model and is famously light.

What's good:

Server runs in well under 256 MB; agents scale horizontally
Clean, container-native pipeline model — every step is a container
First-class support for Forgejo, Gitea, GitLab, and GitHub as the source forge

What's not:

Not GitHub Actions compatible — pipelines are .woodpecker.yml in Woodpecker's own (simpler) DSL, so you rewrite your workflows
Smaller plugin catalog than GitHub's marketplace
You run it as a separate service from your Git host

Install:

# docker-compose.yml — server + one agent, wired to your forge's OAuth app
# See https://woodpecker-ci.org/docs/administration/deployment for the full env vars
docker compose up -d

Verdict: The best standalone pick if you want minimal resource use and don't mind rewriting pipelines into a cleaner DSL.

4. Drone CI — Fine If You're Already On It

Drone pioneered the container-native CI model Woodpecker now carries forward. After Harness acquired it, community energy largely shifted to Woodpecker, but Drone's open-source edition still works well.

What's good:

Mature, battle-tested container pipeline model
Large existing base of .drone.yml pipelines and plugins

What's not:

Momentum has moved to Woodpecker; new community plugins increasingly target it
Same rewrite cost as Woodpecker (not GitHub Actions compatible)

Verdict: Stay if you already run Drone. For a new install, Woodpecker is the more future-proof version of the same idea.

5. GitLab CI (Community Edition) — The Whole Platform

If you self-host GitLab CE, CI/CD is built in via .gitlab-ci.yml and GitLab Runner. You get repos, CI, container registry, issue tracking, and a package registry in one install.

What's good:

One platform for source + CI + registry + issues — no glue between services
Extremely capable pipelines (DAG, parent/child, merge trains)
GitLab Runner can execute on Docker, shell, or Kubernetes

What's not:

Heavy. Official minimum is 4 GB RAM, and you'll want more in practice — this won't share a $5 box with much else
Pipelines use GitLab's DSL, not GitHub Actions syntax — full rewrite
More moving parts to upgrade and back up

Verdict: The right call if you want a single platform and have the RAM (think a CX32/CPX31-class box or larger). Overkill if you just need CI.

6. Concourse CI — Pipelines as First-Class Objects

Concourse treats pipelines, resources, and tasks as declarative, versioned objects. It's beloved by teams that want CI to be fully reproducible and stateless.

What's good:

Genuinely reproducible builds — every input is a typed, versioned "resource"
Excellent visualization of complex pipeline graphs
Stateless workers scale cleanly

What's not:

Steep learning curve; the resource model is a paradigm shift from GitHub Actions
Needs a Postgres + web + worker stack — budget 2 GB+ RAM
Definitely not GitHub Actions compatible

Verdict: For teams that value pipeline purity and reproducibility over migration speed. Not a quick swap.

7. Jenkins — The Plugin Ecosystem (Honorable Mention)

Jenkins is the elder statesman. If a CI integration exists anywhere, there's a Jenkins plugin for it.

What's good:

Unmatched plugin ecosystem (1,800+) — it integrates with essentially everything
Runs almost anywhere; huge community knowledge base
Jenkinsfile pipeline-as-code is mature

What's not:

Plugin sprawl becomes a maintenance and security burden over time
UI and defaults feel dated next to container-native tools
GitHub Actions compatibility only via plugins, and imperfectly

Verdict: Choose it when you need a specific integration only Jenkins has, or you're maintaining an existing Jenkins shop. Not where greenfield teams start in 2026.

Migrating Your GitHub Actions Workflows

The migration cost splits cleanly into two groups:

Near drop-in (Forgejo / Gitea Actions):

Move .github/workflows/*.yml → .forgejo/workflows/ (or .gitea/workflows/)
Register a runner labeled to match your runs-on: (e.g. ubuntu-latest)
Pin actions/* versions; swap any action not available on your instance's mirror
Most run: steps, env, secrets, and matrix builds work as-is

Full rewrite (Woodpecker / Drone / GitLab CI / Concourse / Jenkins):

Translate each job into the target DSL (.woodpecker.yml, .gitlab-ci.yml, etc.)
Re-express marketplace actions as plain run: shell steps or first-party plugins
Re-create secrets and registry credentials in the new tool

Rule of thumb: if your workflows lean heavily on actions/* marketplace steps, a GitHub Actions–compatible runner (Forgejo/Gitea) saves days of rewriting. If your pipelines are mostly shell run: steps already, the rewrite to Woodpecker is trivial and you get a lighter system.

Hosting Recommendations

CI is bursty — idle most of the time, then pegged during a build. You want cheap baseline RAM with burst headroom:

Forgejo/Gitea Actions + runner on the same box: a 4 GB VPS like the Hetzner CX22 (~$5/month) comfortably hosts Git + CI for a small team.
Woodpecker standalone: server fits in a tiny box; put agents on a separate burstable VPS so builds don't starve your Git host.
GitLab CE: plan for 8 GB (CX32-class) once CI runners are active.

For heavier or parallel builds, add a second cheap VPS as a dedicated runner/agent rather than upsizing one box — it isolates build load from your Git UI.

Frequently Asked Questions

Can I run my existing GitHub Actions workflows on a self-hosted server? Mostly yes — if you pick a GitHub Actions–compatible runner. Forgejo Actions and Gitea Actions both run act-based runners that read the same workflow syntax, so your jobs, steps, and most uses: actions work after moving the files to .forgejo/workflows/ or .gitea/workflows/. Tools like Woodpecker, Drone, GitLab CI, and Concourse use their own DSL, so those require rewriting the pipelines.

What's the cheapest way to self-host CI? A single ~$5/month VPS (e.g. a Hetzner CX22, 2 vCPU / 4 GB) can host a Git server plus a lightweight runner for a small team. Woodpecker's server alone fits in a fraction of that. The cost stays flat regardless of build minutes — the opposite of metered GitHub Actions pricing.

Is self-hosted CI secure? It can be more secure (your source and secrets never leave infrastructure you control) but the responsibility shifts to you: keep the runner host patched, isolate build containers, and never run untrusted PRs on a runner with access to production secrets. Use ephemeral container-based runners and scope secrets per repository.

Forgejo Actions or Woodpecker — which should I pick? Pick Forgejo Actions if migration speed matters and you have lots of actions/* marketplace steps — your workflows port over with minimal edits. Pick Woodpecker if you want the lightest possible standalone CI and your pipelines are mostly plain shell steps that are trivial to rewrite into its cleaner DSL.

Do I need a separate server for CI runners? Not to start. A small team can run the Git host and one runner on the same 4 GB box. Add a dedicated runner/agent VPS once builds start competing with your Git UI for RAM — it's cheaper and cleaner to add a second small box than to upsize one.

Will self-hosting CI break my actions/* marketplace steps? On Forgejo/Gitea Actions, popular actions (checkout, setup-node, cache, etc.) generally work because the runner can fetch them. Obscure or org-private actions may need a mirror or a swap to an equivalent run: shell step. Audit your most-used actions before migrating.

The Bottom Line

Already on / moving to Forgejo or Gitea? Use their built-in Actions. Your existing GitHub Actions YAML migrates with the least pain — this is the answer for most teams reading this.
Want a lean standalone CI and don't mind a rewrite? Woodpecker is the community's current favorite, and it's genuinely light.
Want one platform for everything and have the RAM? GitLab CE.
Need reproducibility above all / a specific legacy integration? Concourse or Jenkins, respectively.

Self-hosting CI turns metered minutes into a flat ~$5–15/month VPS bill and removes one more vendor from your critical path. If you've already moved your repos, see the companion guide on self-hosted Git alternatives to GitHub — the two migrations are best done together.