Start with the job, not the brand
Postscript and Salesforce Marketing Cloud are easy to compare on a feature table, but the better decision starts with the job you need done. If the priority is Shopify SMS retention, Postscript deserves a close look. If your team prefers Salesforce Marketing Cloud's workflow or already has data there, Salesforce Marketing Cloud may be easier to adopt.
Where Postscript wins
Postscript wins when the team will actually use SMS campaigns, SMS automations, Shopify focus. That is where the platform is easiest to justify. It is less compelling when you only need a few basic email flows.
Where Salesforce Marketing Cloud wins
Salesforce Marketing Cloud wins when its ecosystem, workflow, or pricing is a better fit for your team. That can matter more than one extra feature, especially if marketers need to move quickly without a long implementation project.
Review themes to check before buying
Look for reviews from teams that match your store size and channel mix. Pay attention to comments about onboarding, support, segmentation, reporting, and what happens as contact volume grows. Those details usually predict the real cost better than the headline feature list.
Where Sequenzy fits
Sequenzy is the lighter choice when email is the actual need. If you want Shopify and WooCommerce email automation, transactional email, newsletters, and Stripe-aware lifecycle messages without SMS or enterprise personalization, it is the simpler stack.