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Email Marketing · head to head

Campaign Monitor vs Jenkins

Campaign Monitor logo

Campaign Monitor

Email Marketing

Email marketing platform priced by contact tier, with unlimited sends only from the mid tier up

From
On request
Rated
-
Full reviewWebsite
Jenkins logo

Jenkins

Technology

A self-hosted automation server that can build almost anything, through a plugin ecosystem that is also its main liability.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Jenkins has a free tier, so it costs nothing to try first.
  • Each has a real cost: Campaign Monitor the Lite tier caps monthly sends at 2,500 regardless of contact list size, so a list of any meaningful size cannot be emailed even once a month without exceeding it.; Jenkins the controller is stateful and, in the open source distribution, has no high availability: build history, configuration and plugin state live on one filesystem, so every plugin upgrade and core update is downtime for every team using it, and a controller disk failure is a restore-from-backup event.
  • They diverge on capability: Campaign Monitor covers Drag-and-drop email builder, Jenkins covers Plugin ecosystem.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Campaign Monitor and Jenkins actually diverge.

Attributes where Campaign Monitor and Jenkins differ
AttributeCampaign MonitorJenkins
Starting priceOn requestFree
Pricing modelPer month by contact tier and plan levelopen-source
Free tierNoYes
PlatformsWebLinux, Windows, Macos, Docker
CategoryEmail MarketingTechnology
FoundedUnknown2011

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Campaign Monitor

  • Drag-and-drop email builder
  • Automation workflows
  • List segmentation
  • Send-time optimisation
  • Landing pages and forms
  • Multi-brand management

Only in Jenkins

  • Plugin ecosystem
  • Distributed agents
  • Declarative and scripted pipelines
  • Shared libraries
  • Configuration as Code
  • Credentials management
  • Self-hosted anywhere
  • Multibranch and organisation folders

What people use each for

The jobs each tool is most often brought in to do.

Campaign Monitor

  • A small marketing team wanting straightforward campaign design and automation without a full martech stacknot Jenkins
  • A business with a list under a few thousand contacts and infrequent sends, where the Lite tier's cap is not a real constraintnot Jenkins
  • An agency managing multiple brands wanting Enterprise-tier multi-brand account managementnot Jenkins
  • A team wanting a bundled website builder alongside email on the Premier tiernot Jenkins

Jenkins

  • Builds that must touch physical hardware, such as embedded devices, test rigs or signing modules attached to a specific machinenot Campaign Monitor
  • Air-gapped or heavily regulated environments where a hosted CI runner cannot be used at allnot Campaign Monitor
  • Toolchains that hosted CI does not support, including node-locked commercial licences for EDA, CAD or simulation softwarenot Campaign Monitor
  • Organisations with years of existing Jenkins pipelines where the migration cost currently outweighs the operational cost of stayingnot Campaign Monitor

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Campaign Monitor

  • The Lite tier caps monthly sends at 2,500 regardless of contact list size, so a list of any meaningful size cannot be emailed even once a month without exceeding it.
  • Unlimited sending only starts at the Essentials tier, so the cheap headline Lite price is not comparable to competitors that offer unlimited sends at their entry tier.
  • Its e-commerce-specific automation (abandoned cart flows, predictive segments) is less developed than Klaviyo's, making it a weaker fit for retail-heavy senders.
  • As part of the Marigold group alongside Sailthru and other acquired brands, product roadmap priority is shared across a portfolio rather than dedicated solely to Campaign Monitor.
  • Pricing multiplies on two axes, contact tier and plan level, so estimating total cost requires checking both dimensions rather than a single number.

Jenkins

  • The controller is stateful and, in the open source distribution, has no high availability: build history, configuration and plugin state live on one filesystem, so every plugin upgrade and core update is downtime for every team using it, and a controller disk failure is a restore-from-backup event.
  • Capability comes from around 1,900 community plugins of very uneven maintenance, and the Jenkins security team regularly publishes advisories for plugins whose maintainer has gone; in some cases the advisory itself states that no fix is available and the only remedy is to stop using it.
  • Plugin upgrades are coupled: one plugin can require a newer core or a newer version of another plugin, so applying a single security fix cascades into a coordinated upgrade of a dozen components on a timetable you did not choose.
  • Pipelines are Groovy running under a sandbox and a continuation-passing-style transformation, so ordinary Groovy constructs sometimes fail in non-obvious ways, and the debugging skill you build transfers to no other CI system.
  • It is free to licence and expensive to run: somebody must own the controller, the agents, the Java version, the credentials store and the plugin upgrade cycle, and that recurring staff cost is the usual reason organisations move to hosted CI even when Jenkins works.
  • Leaving is costly by construction, because shared libraries, plugin-specific pipeline steps and accumulated freestyle jobs have no mechanical translation into GitHub Actions or GitLab CI, so the migration is a rewrite whose price grows every year you defer it.

Pricing, plan by plan

Campaign Monitor

On request
  • Lite$undefined/month
    • Monthly send cap of 2,500 emails regardless of list size
    • Basic campaign and template tools
    • Priced by contact tier from under 500 to 50,000+
  • Essentials$undefined/month
    • Unlimited monthly email sends
    • Priority support
    • Priced by contact tier from under 500 to 50,000+
  • Premier$undefined/month
    • Unlimited monthly email sends
    • Premier-level phone support
    • Drag-and-drop website builder included
  • Enterprise$undefined/year
    • Custom quote
    • Multi-brand account management
    • Dedicated account manager, SOC2 and GDPR-aligned security

Jenkins

Free
  • Open SourceFree
    • Unlimited builds
    • 1000+ plugins
    • Self-hosted
  • CloudBees CI$undefined/month
    • Enterprise features
    • High availability
    • Role-based access

Which should you pick?

Choose Campaign Monitor if

  • You need drag-and-drop email builder.
  • You also want automation workflows.
Campaign Monitor review

Choose Jenkins if

  • You need plugin ecosystem.
  • You want to start without paying.
  • You work on Linux, Windows, Macos, Docker.
  • You also want distributed agents.
Jenkins review

Questions people ask

Is Campaign Monitor or Jenkins better?
Neither clearly leads. Campaign Monitor starts at On request and Jenkins at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Campaign Monitor or Jenkins?
Jenkins has a free tier; the other does not. Paid plans start at On request for Campaign Monitor and Free for Jenkins.
Does Campaign Monitor or Jenkins run on more platforms?
Campaign Monitor runs on Web. Jenkins runs on Linux, Windows, Macos, Docker.
Can I use Jenkins for free?
Yes. Jenkins has a free tier, so you can try it without paying. Campaign Monitor starts at On request.
What is Campaign Monitor best used for?
Campaign Monitor is most often used for a small marketing team wanting straightforward campaign design and automation without a full martech stack, a business with a list under a few thousand contacts and infrequent sends, where the lite tier's cap is not a real constraint, an agency managing multiple brands wanting enterprise-tier multi-brand account management, a team wanting a bundled website builder alongside email on the premier tier. Of those, a small marketing team wanting straightforward campaign design and automation without a full martech stack and a business with a list under a few thousand contacts and infrequent sends, where the lite tier's cap is not a real constraint are not what Jenkins is typically brought in for.
What can Campaign Monitor do that Jenkins cannot?
Campaign Monitor covers Drag-and-drop email builder, Automation workflows, List segmentation, Send-time optimisation. Jenkins covers Plugin ecosystem, Distributed agents, Declarative and scripted pipelines, Shared libraries.

Answered from the vendors’ own pages

Campaign Monitor: Does the cheapest plan include unlimited sends?

No. Lite caps monthly sends at 2,500 emails regardless of list size; unlimited sending starts at the Essentials tier.

Jenkins: Why choose Jenkins over GitHub Actions or GitLab CI?

When the build needs something hosted runners cannot give you: physical hardware, an air-gapped network, a node-locked commercial tool licence, or an unusual platform. If none of those apply, hosted CI is usually less work to own.

Campaign Monitor: Who owns Campaign Monitor?

Marigold, a marketing technology group that also owns Sailthru and other acquired email and loyalty platforms.

Jenkins: Can Jenkins run in high availability?

Not in the open source distribution, which runs a single active controller. High availability and active-active controllers are features of CloudBees' commercial products. Open source deployments mitigate it with fast restores and, sometimes, multiple independent controllers.

Campaign Monitor: Is there a free plan?

A 30-day free trial with a 500-contact limit is available, but there is no permanent free tier.

Jenkins: How risky are the plugins?

This is the main operational risk. Many plugins have a single volunteer maintainer, and Jenkins publishes security advisories for unmaintained plugins where no fix exists. Auditing which plugins you depend on and who maintains them should be a periodic task, not a one-off.

Jenkins: Do I need to know Groovy?

For declarative pipelines you can go a long way without it. Anything involving shared libraries, conditional logic or custom steps is Groovy, and it runs in a sandboxed, transformed environment where standard Groovy idioms sometimes behave unexpectedly.

Jenkins: What does it cost?

The software is free under the MIT licence. The cost is infrastructure and staff time to run controllers, agents and upgrades, plus a CloudBees subscription if you want high availability, support or centralised management of many controllers.

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