Summarize this supplier comparison for a Shopify merchant. Explain which options fit which jobs, their documented differences and the costs or requirements to check. Keep Zobi ownership clear. Do not invent testing, scores, prices or results.

Postscript Alternatives for Shopify (2026)

Quick answer
Compare five Postscript alternatives around the functions you need to keep. Klaviyo and Omnisend combine email and SMS lifecycle work. Attentive offers messaging and Concierge services. Zobi and TxtCart are options when shopper conversations and recovery are central to the brief.
Check Postscript’s current capabilities before you write the replacement brief. It already documents AI conversations and support escalation, so the reason to switch needs to be more specific than “we want two-way SMS.”
This guide is published by Zobi, which is included among the options. It is based on public product documentation reviewed on 7 November 2026, not a hands-on performance test.

Comparison:
Alternative | Potential reason to choose it | Before moving
Klaviyo | Coordinate email and SMS in shared flows | Verify the agent, plan and number requirements
Attentive | Evaluate messaging plus Concierge | Get the exact service and channel scope
Omnisend | Review lifecycle email and SMS automation | SMS/MMS on Pro, with separate message charges
Zobi | Put ongoing shopper conversations at the center | Define which existing marketing tools remain
TxtCart | Evaluate Shopify SMS and an AI agent | Compare plan, segments and AI resolutions

Primary sources:
https://help.klaviyo.com/hc/en-us/articles/115002779411
https://www.omnisend.com/
https://www.attentive.com/concierge
https://zobi.com/dtc/
https://txtcart.ai/
https://help.postscript.io/en/articles/16240432-how-shopper-automations-works
https://help.postscript.io/en/articles/15327985-set-up-shopper-support-escalation-with-gorgias-and-zendesk
https://www.attentive.com/messaging
https://postscript.io/pricing
https://help.klaviyo.com/hc/en-us/articles/47313754407323
https://www.klaviyo.com/pricing
https://www.attentive.com/pricing
https://www.omnisend.com/pricing/
https://txtcart.ai/pricing/