$ ~/cicdcalculator

GitHub Actions vs Jenkins in 2026
./compare --actions --jenkins --crossover-math

The most common CI/CD migration question of 2026 is some variant of "should we move off Jenkins?" The answer is almost always volume-dependent. GitHub Actions and Jenkins represent two opposing operational philosophies: pay per minute for a hosted convenience, or pay engineering hours for self-hosted control. The crossover point between them is mathematically straightforward but the assumptions matter. This page walks through both sides honestly, including the operator-time cost most analyses underprice.

Pricing comes from the GitHub pricing page. Jenkins is open source under the MIT licence; cloud infrastructure rates come from AWS EC2 on-demand and GCP Compute.

The cost-model comparison

DimensionGitHub ActionsJenkins
Licence$4-$21 / user / mo$0 (MIT)
Compute$0.010 / Linux minYour VM bill
Operator time~0 hrs / mo4-20 hrs / mo
Plugin maintenanceActions managed in marketplace1,800+ plugins, your problem
ScalingAutomaticYou configure agents

The crossover calculation

GitHub Actions Team cost = seat fee + overage. For 25 developers at $4 plus overage at $0.010 per Linux minute over the 3,000 included, monthly cost climbs roughly $100 per 10,000 additional minutes.

Jenkins cost = controller VM plus agent VMs plus operator time. A typical mid-size deployment: $80 monthly for a controller on a t3.medium, $200 monthly for 2-4 m5.large agents on Spot, $900 monthly for 6 hours of admin at a $150 fully loaded rate. Total: about $1,180 monthly, scaling sub-linearly with build volume because adding more builds means more agent-minutes on existing VMs, not more controllers or operators.

GitHub Actions equals Jenkins TCO when seat fees plus overage reach $1,180. For 25 developers on Team at $100 in seats, that means $1,080 in overage, or about 108,000 minutes over the included 3,000, which is 111,000 total minutes per month. Above that, Jenkins is cheaper. Below that, GitHub Actions is cheaper. The crossover varies with team size: at 5 developers the crossover is around 120,000 minutes (because seats are negligible), at 100 developers it is around 90,000 minutes (because Enterprise plan with $21 per user and 50,000 included minutes erodes the overage burden).

Monthly cost at three scales

5-dev team
Actions
$40
Jenkins
$1,000

Actions free tier covers the load. Jenkins fixed cost (controller + admin time) dominates at small scale.

25-dev team
Actions
$370
Jenkins
$1,180

Actions still ahead. Jenkins crossover comes once monthly minutes exceed ~110K.

100-dev team
Actions
$3,200
Jenkins
$1,500

Jenkins wins decisively at scale. Operator time still 6-10 hrs / mo, infra is the only thing that scales.

Beyond the dollar signs

Cost is only one input. GitHub Actions wins on developer experience: workflows live next to code, the marketplace is enormous, the UI is solid, and onboarding a new engineer is straightforward. Most engineers prefer working in Actions even when they understand Jenkins is cheaper at scale, because the friction of writing and debugging an Actions workflow is meaningfully lower than maintaining a Jenkinsfile.

Jenkins wins on flexibility, but in a way that often costs more than it saves. The plugin ecosystem can do almost anything, which means many Jenkins shops have accumulated decades of bespoke logic that nobody fully understands. Migrating off Jenkins is often blocked not by the platform itself but by the institutional knowledge embedded in Jenkinsfiles and shared libraries. The dollar saving of staying on Jenkins is real; the technical debt of staying on Jenkins is also real.

Jenkins also wins on data residency and compliance for teams that cannot use SaaS CI. Builds run on your infrastructure, build artifacts never leave your network, and audit logs live wherever you put them. GitHub Actions has Enterprise Cloud with stronger guarantees, plus GitHub Enterprise Server for fully on-prem, but the all-in cost of Enterprise Server is comparable to operating Jenkins so the choice is driven by other factors.

Recommendation summary

Default to GitHub Actions if you are under 50 developers, build volume is below 50,000 monthly minutes, and you do not have existing Jenkins infrastructure. Start simple, scale into self-hosted Actions runners when costs justify it.

Stay on Jenkins if you already have a functional Jenkins setup with 50+ developers and 100,000+ monthly minutes. Migration to Actions at that scale is a multi-quarter project and the cost saving rarely materialises in the first 18 months because the migration cost itself is substantial.

Adopt Jenkins greenfield only if you have a specific reason: regulatory data-residency requirements, an existing platform-engineering team that wants to own the stack, or a build pattern that does not fit cloud-CI architectures. For everyone else, the operator burden makes Actions or another hosted platform the easier default.

Related comparisons

Jenkins TCOGitHub Actions deep diveGitLab CI vs Jenkinsmigration calculatorself-hosted vs cloudcost calculator

Frequently Asked Questions

# click any question to expand

When does Jenkins become cheaper than GitHub Actions?>
Roughly at 50,000 monthly Linux build minutes consistently, assuming the team can absorb 4-8 hours per month of Jenkins admin time without hiring. Below that volume, GitHub Actions per-minute fees are smaller than the engineering cost of operating Jenkins. Above that, the per-minute fees compound while Jenkins infrastructure and operator time stay roughly flat. Teams with very high build volume (100,000+ minutes per month) routinely report 60-80 percent cost reduction by moving Jenkins-ward.
How much does a Jenkins admin actually cost?>
Plan 4-20 hours per month of operator time for a typical mid-size Jenkins setup. The work is mostly routine: plugin upgrades, security patches, occasional troubleshooting of failed builds, capacity tuning, certificate rotation, agent registration. At a fully loaded engineering rate of $150 per hour, that is $600-$3,000 monthly in implicit cost on top of the cloud infrastructure bill. Most teams that successfully run Jenkins absorb this into existing platform-engineering capacity rather than hiring for it.
Can I run Jenkins for the same cost as GitHub Actions?>
Below 30,000 monthly minutes, no. The fixed cost of Jenkins (one always-on controller VM at $35-80 per month plus operator time) exceeds the GitHub Actions overage charges at that volume. Above 50,000 minutes, yes, by a wide margin. The crossover is volume-dependent; calculate yours by estimating Jenkins controller cost plus 6 hours of admin time per month, and compare to your projected GitHub Actions overage at the included-allowance threshold.
Does GitHub Enterprise change the comparison?>
GitHub Enterprise at $21 per user per month includes 50,000 monthly Linux build minutes per organisation, which dramatically expands the GitHub Actions value proposition for large teams. A 100-developer team on Enterprise gets effectively 500,000 included monthly minutes, comparable to most production Jenkins setups. The seat premium is steep ($2,100 per month for 100 users) but for teams that need the Enterprise governance features anyway, it makes the Jenkins comparison close to a wash.
What about hybrid setups?>
Hybrid Jenkins-plus-Actions is a common pattern. Use GitHub Actions for PR checks and lightweight pipelines (low volume, high elasticity); use Jenkins for nightly integration suites and heavy release pipelines (high volume, predictable timing). The split absorbs both platforms' strengths and avoids both their cost peaks. Operationally it adds complexity, so it makes sense only when one of the platforms is already a sunk cost.
Which is more secure?>
Both are secure if operated competently. GitHub Actions reduces operator burden by managing the runner OS, patches and Docker daemon. Jenkins shifts that responsibility to you. The biggest Jenkins-specific risk is plugins; Jenkins has 1,800+ plugins of varying quality and the attack surface compounds with each one installed. CVEs are frequent. Most Jenkins security incidents in the wild trace to outdated plugins, not the core. A disciplined upgrade cadence (monthly plugin updates, quarterly core upgrades) keeps the risk manageable.
What is the migration effort like?>
Jenkins to GitHub Actions is typically 6-12 weeks of part-time work for two engineers on a mid-size team with 10-20 pipelines. Auto-translation tools help with the structural conversion but the messy Groovy logic that accumulates in Jenkinsfiles often requires manual rewrites. Plan a clean-room rewrite for any pipeline older than three years. Reverse migrations (Actions to Jenkins) are rarer and faster, because Actions workflows are already in declarative YAML.