Campaign Monitor review

What Campaign Monitor actually does

Campaign Monitor is an email marketing platform that made its name on design. The drag-and-drop builder produces campaigns that survive contact with Outlook and a small phone screen, and it has always accepted hand-coded templates alongside its own, which is why agencies adopted it early: a designer builds the template once, and the client edits copy inside it without breaking anything. The rest of the product has filled in around that core, list management, signup forms, segmentation, a visual journey designer for automated sequences, transactional sending, SMS, and reporting that places results against industry benchmarks.

The company is now part of Marigold, a group that also owns Emma, Vuture and Sailthru, and the product is sold as Campaign Monitor by Marigold. That ownership shows up in two ways. The platform gets steady maintenance and a set of AI additions, a writing assistant and a pre-send optimisation pass, rather than dramatic reinvention. And the plans were repackaged in 2025 into Lite, Essentials and Premier tiers, priced by contact count, at levels noticeably above what long-time users remember.

Key features

The capability set is wide enough for most small marketing teams and stops short of what a lifecycle marketing team would want.

• Responsive drag-and-drop email builder, with custom coded templates supported for agency workflows
• Visual journey designer for behaviour-triggered automated sequences
• Segmentation and personalisation, with advanced engagement segments reserved for the top self-serve tier
• Transactional email and a sending API in the same account as marketing campaigns
• Signup forms, SMS sending, and a website builder bundled at the highest tier
• Campaign analytics with industry benchmarks, inbox preview and send-time optimisation

Who it's for

The best fit is a small marketing team or an agency whose email programme is campaign-shaped: a newsletter, a promotion, an event sequence, sent to a list that grows slowly. Design quality and deliverability matter more to those senders than branching logic, and Campaign Monitor is competitive on both. Non-profits and membership organisations are well represented for the same reason, helped by connections to fundraising tools.

It is a weak choice for anyone whose email is driven by product or purchase behaviour. Ecommerce teams will find the automation shallow next to purpose-built alternatives, and anyone running complex multi-step lifecycle programmes will hit the limits of the journey designer. It is also poor value for a large list sent to infrequently, because pricing follows contacts rather than volume, and for a team that wanted to start free, the free option here expires after a month.

How it compares

Mailchimp remains the default for small businesses, with a broader app ecosystem, a genuinely free tier and a similar habit of raising prices as lists grow. ActiveCampaign is the stronger automation platform by a distance, with conditional logic and CRM features Campaign Monitor does not attempt, at the cost of a steeper learning curve. Klaviyo owns the ecommerce case outright, with product and order data driving flows that a general-purpose tool cannot match. Campaign Monitor's remaining edge is the editor and the agency-friendly client structure, which is a narrower advantage than it was five years ago.

Verdict

This is a competent, well-maintained email platform whose distinctive strength, making campaigns look right without a developer, is real but no longer rare. The rating reflects a product that has been overtaken rather than one that is broken: automation lags the leaders, the entry plan's send cap makes it a decoy for most buyers, contact-based pricing punishes large dormant lists, and the free option is a trial in disguise. Teams already invested in it have little reason to move in a hurry; teams choosing today should price the tier they would actually need at their real list size before deciding.