Start with the channel

The fastest way to make this decision is to name the primary channel.

If the channel is Shopify SMS, Postscript deserves a serious look. If the channel is SMS plus a broader customer messaging program, Attentive is stronger. If the channel is email, neither should be the default answer.

Where Postscript makes more sense

Postscript makes more sense when you want a focused SMS tool for Shopify. That narrowness is useful. Your team can keep email in Klaviyo, Omnisend, Sequenzy, or another platform, and use Postscript for the text-message part of retention.

It is also easier to explain internally. You are not buying a broad omnichannel platform. You are buying SMS for Shopify.

Where Attentive makes more sense

Attentive makes more sense when SMS is already a meaningful revenue channel and you want a bigger partner around it. The value is not just sending texts. It is list growth, compliance, AI-assisted conversations, mobile messaging expansion, and strategic support.

That is useful for larger DTC teams. It can be unnecessary for smaller stores that only need abandoned cart texts.

Where Sequenzy fits

Sequenzy fits when the SMS conversation is a distraction. A lot of stores compare SMS tools because they want more retention revenue, but the immediate gap is often email: welcome flows, cart recovery, post-purchase education, win-back campaigns, and transactional messages.

For that job, Sequenzy is more direct. It supports Shopify and WooCommerce, writes sequences with AI, and keeps transactional and marketing email in one place.