Postscript Per-Message Pricing Advantage

Postscript wins the Shopify SMB segment by making SMS feel like a metered software tool, not a tax on sales growth. A merchant can estimate cost before sending, because billing is tied mainly to message volume and plan tier, while revenue share models rise automatically as campaigns work better. That matters in SMS, where merchants already compare vendors closely on both product depth and monthly bill, and frequently switch when a cheaper tool covers the needed workflows.

• Postscript started with simple per message pricing, around $0.01 per SMS, and positioned itself as transparent on carrier fees and plan minimums. That structure fits Shopify stores that want to run campaigns, flows, popups, and subscriber growth tools without needing to model a percentage of attributed revenue every month.
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• The practical tradeoff is that usage based pricing caps vendor take rate when a brand gets better at conversion. If one abandoned cart flow suddenly performs better, the merchant mostly pays for the same sends, not a bigger cut of resulting orders. That makes Postscript especially attractive for cost sensitive brands protecting margin.
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• At the higher end of the market, pricing matters less than product breadth. Attentive sells custom plans and pushes richer opt in, analytics, and multichannel capabilities. Klaviyo bundles SMS into a larger contact and data driven marketing stack. Postscript stays compelling when a merchant wants strong Shopify native SMS without paying for a broader suite.
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The market is moving toward bundles, AI assisted conversations, and broader multichannel suites, but transparent SMS economics remain a wedge. Postscript can keep winning smaller and mid sized Shopify brands by preserving clear per send pricing while adding enough automation, data, and service features that merchants do not feel forced up into a more expensive platform.