If you are serious about SMS for Shopify, Postscript is probably already on your radar. It is a well known, SMS-only platform built specifically for Shopify stores, with strong list growth tools, popups and automations.
Pulse, on the other hand, is an AI powered SMS and email marketing platform. It focuses on 2-way conversations, lead nurturing and omnichannel campaigns, with SMS, email and WhatsApp all managed from one place.
This comparison walks through pricing, features, AI capabilities and use cases so you can decide whether your next campaign belongs in Postscript or in Pulse AI SMS and email marketing platform.
Quick snapshot: Pulse vs Postscript in one table #
| Pulse | Postscript | |
|---|---|---|
| Primary focus | AI powered SMS and email marketing across industries | SMS marketing and sales for Shopify brands |
| Channels | SMS, email, WhatsApp, 2-way inbox | SMS and MMS (Shopify only) |
| Shopify focus | Built for ecommerce, with Shopify integration on roadmap | Native Shopify app, deeply integrated with Shopify data and flows Shopify App Store+1 |
| AI approach | AI driven copy, 2-way replies, lead nurturing and qualification | AI features like Brand Center, Infinity Testing and Shopper to optimize campaigns while staying on brand |
| Pricing model | Fixed monthly plans with bundled SMS, email and AI credits | Free install + monthly minimum spend, then per-SMS pricing plus carrier fees |
| Best fit | Brands that want 2-way SMS plus email and AI nurturing in one tool | Shopify stores that want an SMS specialist tightly wired into their store data |
Pricing comparison: Pulse vs Postscript #
Pulse pricing (bundled credits) #
Pulse uses simple plans where SMS, email and AI credits are included together.
| Pulse plan | Monthly price | SMS credits | Email credits | AI credits | Contacts |
|---|---|---|---|---|---|
| Free | $0 | 100 | 100 | 15 | 100 |
| Starter | $19 | 7,500 | 7,500 | 100 | 2,500 |
| Professional (popular) | $39 | 30,000 | 20,000 | 250 | 10,000 |
| Business | $89 | 100,000 | 50,000 | 500 | 30,000 |
| Enterprise | Contact us | Custom | Custom | Custom | Custom |
You can test it without risk on the Free plan here:
Start with Pulse AI SMS and email marketing.
Postscript pricing (Shopify app) #
Postscript is free to install as a Shopify app, but you pay a minimum monthly spend plus per-SMS fees.
| Postscript plan | Base price | SMS pricing (US example) | Notes |
|---|---|---|---|
| Starter | $0/mo, but $30 monthly minimum spend | From about $0.009 per SMS + carrier fees, $0.045 per MMS | Includes campaigns, automations, unlimited segments, acquisition tools, toll free number |
| Growth | $100/mo | From about $0.008 per SMS + carrier fees, $0.03 per MMS | Adds unlimited keywords and live chat/email support |
| Professional | $500/mo | From about $0.007 per SMS + carrier fees, $0.024 per MMS | Adds onboarding specialist, dedicated CSM, priority support, custom integrations and opt in tools |
| Enterprise | Custom | Custom | Designed for large brands with high volume and advanced needs |
All plans come with a 30-day free trial and an SMS credit allowance for your first month. Shopify App Store+1
Pricing takeaway #
- If you want to send a lot of SMS and also run email campaigns, Pulse’s bundled credits usually give you more volume per dollar and more channels in one place.
- If you are a Shopify store that wants a pure SMS specialist and is comfortable with per-message billing plus a minimum spend, Postscript’s model is straightforward and predictable on the Shopify side.
Features: Shopify SMS specialist vs omnichannel AI platform #
Channels and scope #
Postscript
Postscript is focused almost entirely on SMS for Shopify brands:
- One to many SMS campaigns and automated flows
- MMS support
- Subscriber acquisition via popups, forms, keywords and at checkout
- Deep use of Shopify customer and order data for segmentation and personalization
It does not include email marketing. If you want email, you pair Postscript with another tool like Klaviyo or Shopify Email.
Pulse
Pulse is channel agnostic and covers:
- SMS campaigns and 2-way SMS conversations
- Email campaigns and sequences
- WhatsApp messaging
- A shared inbox to manage all replies with AI assistance.
That means you can run a welcome journey that starts on email, follows up on SMS, and reactivates via WhatsApp without jumping between multiple products.
Automation capabilities #
Both tools offer automations, but the shape is different.
Postscript automations
- Shopify triggered flows such as abandoned cart, browse abandonment, post purchase and win back
- Campaign scheduling with segments based on purchase history and behavior
- AI powered optimization tools like Infinity Testing, which automatically tests message variants at scale postscript.io+1
Pulse automations
- Visual flows that combine SMS, email and WhatsApp in one journey
- Event and segment triggers for ecommerce, lead gen and B2B funnels
- AI that helps decide not just copy but also responses and qualification paths (for example, asking follow-up questions and tagging “hot” leads).
If you live exclusively in Shopify and only care about SMS, Postscript’s flows are very polished. If you need omnichannel automation that spans SMS and email and you care about AI driven lead nurturing, Pulse AI SMS and email automation is built for that broader journey.
AI: optimization vs conversational intelligence #
Postscript’s AI suite focuses on making campaigns smarter while staying on brand:
- Brand Center keeps SMS copy aligned with your tone of voice
- Infinity Testing runs ongoing experiments on copy and sends to eke out incremental revenue
- Shopper helps personalize campaigns based on behavioral data postscript.io+1
Pulse uses AI in a more conversational, full-funnel way:
- AI helps write SMS and email campaigns, but also replies to inbound texts in a humanlike tone
- AI lead nurturing flows can qualify leads, ask questions, and push warm contacts toward checkout or booking
- AI assists your team inside the shared inbox, suggesting responses and next best actions.
So Postscript’s AI is mainly about optimizing outbound SMS performance. Pulse’s AI is about turning SMS and email into an ongoing, two-way dialogue with your customers.
Shopify focus vs broader stack #
This is the biggest philosophical difference.
- Postscript is a pure Shopify app. You install it from the Shopify App Store, connect your store, and everything (popups, flows, segmentation) revolves around Shopify data. It is a great fit if Shopify is your whole world.
- Pulse is platform agnostic with a strong ecommerce focus. It already serves ecommerce brands and has Shopify integration in scope, but it is also designed to work with agencies, B2B teams and verticals like real estate or local services without depending solely on Shopify.
If your business model will always be “Shopify first, everything else second”, Postscript’s deep integration is valuable. If you run multiple brands, sell on and off Shopify, or also handle B2B leads, Pulse gives you more long term flexibility.
For Shopify-heavy brands, you can also lean on the ecommerce specific Pulse LP:
Pulse SMS marketing for ecommerce and Shopify stores.
2-way conversations and customer support #
Both tools understand that SMS should be a conversation, not just a megaphone.
- Postscript supports 2-way conversations and can be used for basic support, though its primary positioning is marketing and sales campaigns.
- Pulse was designed from day one for 2-way SMS and multi-channel conversations. Your team can see every reply in a single inbox and let AI handle simple questions while humans step in for complex ones.
If you want your SMS tool to double as a lightweight support channel and lead qualifier, that shared inbox plus AI in Pulse becomes a major advantage.
Reporting, ROI and compliance #
Postscript
Postscript is very focused on measurable ROI:
- Revenue and ROI tracking for each campaign and automation
- Benchmarks based on Shopify data
- Strong compliance tooling for TCPA, opt in flows, unsubscribe handling and quiet hours
Pulse
Pulse tracks:
- Revenue attributed to campaigns and flows
- Replies, conversation quality and lead status
- Performance across SMS, email and WhatsApp from one dashboard
Both platforms take compliance seriously. If you are a Shopify brand with a heavy US audience and complex consent requirements, Postscript’s long history there is reassuring. If you need multi-channel attribution with a focus on lead conversion rather than only store revenue, Pulse’s analytics are more holistic.
When Postscript is the better choice #
You should lean toward Postscript if:
- Your business is a pure Shopify ecommerce brand (or Shopify Plus)
- You want an SMS specialist with hundreds of Shopify specific templates and best practices
- You are fine keeping email in a separate tool like Klaviyo
- Your volume is high enough that Postscript’s dedicated support and AI optimization tools justify the spend
In short, Postscript is a strong SMS-only engine for Shopify stores that already have their email and broader marketing stack settled.
When Pulse is the better choice #
Pulse is likely the stronger fit if:
- You want SMS and email campaigns in one platform rather than stitching tools together
- You care about 2-way SMS communication and AI lead nurturing, not just outbound blasts
- You plan to grow into multiple channels (email, SMS, WhatsApp) and possibly beyond Shopify alone
- You value bundled pricing where SMS, email and AI are included instead of separate line items
If your main question is “how do we turn more subscribers and visitors into customers without hiring a massive marketing team”, Pulse AI SMS and email marketing platform is built around that exact problem.
FAQ: Pulse vs Postscript #
Is Postscript only for Shopify?
Yes. Postscript is built specifically for Shopify and Shopify Plus brands. You install it as a Shopify app and it relies heavily on Shopify data for segmentation and automation. Shopify App Store+2postscript.io+2
Does Pulse have a Shopify app?
Pulse is already used by ecommerce brands and has Shopify integration on its roadmap. Even before a native app, you can run full SMS and email campaigns, abandoned cart flows and AI nurturing with Pulse and connect it to Shopify using your existing data setup. theltdhub.com+2Instagram+2
Can Postscript replace Pulse for email marketing?
No. Postscript is SMS only. You will still need a separate email marketing platform. Pulse combines SMS, email and WhatsApp in one place, so you can orchestrate full customer journeys without juggling multiple UIs. postscript.io+2postscript.io+2
Which tool is cheaper for a growing Shopify brand?
It depends on your mix of channels and volume. Postscript can be very effective if you spend enough on SMS to leverage its optimization and support. Pulse often becomes more cost effective once you factor in that you get high SMS volumes plus email and AI under one subscription instead of paying separately. Omnisend+2Software Finder+2
Can I use both, with Pulse on top of Postscript?
Practically, you would usually choose one SMS sending platform to avoid customer confusion and compliance issues. A more common pattern would be: use Pulse as your AI SMS and email hub and keep specialized tools (analytics, CRO, onsite widgets) around it, rather than stacking two SMS senders.
