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Email Marketing · head to head

Campaign Monitor vs Postscript

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
Postscript logo

Postscript

Marketing

SMS marketing built for Shopify merchants, with carrier fees billed on top of message rates

From
$49/month
Rated
-
Full reviewWebsite

The short version

  • 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.; Postscript carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
  • They diverge on capability: Campaign Monitor covers Drag-and-drop email builder, Postscript covers Shopify segmentation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

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

Attributes where Campaign Monitor and Postscript differ
AttributeCampaign MonitorPostscript
Starting priceOn request$49/month
Pricing modelPer month by contact tier and plan levelPer month plus per message sent
PlatformsWebWeb, iOS
CategoryEmail MarketingMarketing

Identical on both: free tier (No), 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 Postscript

  • Shopify segmentation
  • Automated flows
  • Subscriber acquisition
  • Two-way conversations
  • MMS campaigns
  • Revenue attribution
  • Headless SDK
  • Usage-based tiers

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 Postscript
  • A business with a list under a few thousand contacts and infrequent sends, where the Lite tier's cap is not a real constraintnot Postscript
  • An agency managing multiple brands wanting Enterprise-tier multi-brand account managementnot Postscript
  • A team wanting a bundled website builder alongside email on the Premier tiernot Postscript

Postscript

  • A Shopify direct-to-consumer brand that wants abandoned cart recovery by text rather than another email in an ignored inboxnot Campaign Monitor
  • A brand running a product drop where a timed broadcast to an opted-in list is the whole launch mechanismnot Campaign Monitor
  • A merchant segmenting by past purchase and variant to send replenishment reminders at the right intervalnot Campaign Monitor
  • A store on headless Shopify or a custom stack that still wants SMS built on order data through the SDKnot 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.

Postscript

  • Carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
  • The cheapest per-message rates require the $500 a month plan, so a small sender pays more than double the headline low rate per text.
  • The $0 Starter plan carries a $49 minimum monthly spend, so it is not a free tier and quiet months still generate a bill.
  • US SMS marketing carries real legal exposure under consent, quiet hours and carrier registration rules, and the compliance obligation sits with the merchant, not the platform.
  • It is SMS and MMS only, so email, push and on-site messaging live in a separate tool and audience suppression between the two has to be managed across systems.

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

Postscript

$49/month
  • Starter$49/month
    • $0 base fee but a $49 minimum monthly spend
    • SMS at $0.015 and MMS at $0.045 per message
    • Campaigns, automations, acquisition tools and analytics
  • Growth$100/month
    • Lower per-message rates than Starter
    • Full campaign and automation feature set
    • No contract required
  • Professional$500/month
    • Rates falling towards $0.007 SMS and $0.024 MMS
    • Suited to high-volume senders
    • Upgrade or downgrade at any time
  • Enterprise$undefined/month
    • Custom pricing on a contract
    • Negotiated message rates and support terms

Which should you pick?

Choose Campaign Monitor if

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

Choose Postscript if

  • You need shopify segmentation.
  • You work on Web, iOS.
  • You also want automated flows.
Postscript review

Questions people ask

Is Campaign Monitor or Postscript better?
Neither clearly leads. Campaign Monitor starts at On request and Postscript at $49/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Campaign Monitor or Postscript?
Campaign Monitor starts at On request and Postscript at $49/month.
Does Campaign Monitor or Postscript run on more platforms?
Campaign Monitor runs on Web. Postscript runs on Web, iOS.
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 Postscript is typically brought in for.
What can Campaign Monitor do that Postscript cannot?
Campaign Monitor covers Drag-and-drop email builder, Automation workflows, List segmentation, Send-time optimisation. Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

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.

Postscript: Is Postscript only for Shopify?

It is built for Shopify and that is where its segmentation advantage lies, but headless and non-Shopify stores are supported through an SDK with more setup work.

Campaign Monitor: Who owns Campaign Monitor?

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

Postscript: What is the real cost per text?

The plan rate plus carrier fees. On Starter that is about $0.015 plus roughly $0.00418 in US carrier fees per SMS, so budget close to two cents a message before discounts.

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.

Postscript: Is the Starter plan free?

No. The base fee is $0 but there is a $49 minimum monthly spend, so it functions as a $49 floor.

Postscript: Do I need a contract?

No. Contracts are offered but not required, and plans can be moved up or down at any time under usage-based billing.

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