Best SMS Marketing Apps for Shopify 2026: Postscript vs SMSBump vs Attentive

Choosing the right SMS marketing app is one of the most consequential decisions a Shopify store owner can make. The platform you select will determine how much you pay per message, how sophisticated your automations can be, what segmentation options are available, and how well your team can manage day-to-day operations. Get this decision right and SMS becomes your highest-ROI marketing channel. Get it wrong and you are locked into a contract with a tool that cannot support your growth.

In 2026, three platforms dominate the Shopify SMS marketing space: Postscript, SMSBump (now rebranded as Yotpo SMS), and Attentive. Each has genuine strengths and specific use cases where it outperforms the others. This comparison covers pricing, features, integrations, support quality, and the store profiles that are the best fit for each platform.

Postscript: Best for Shopify-Native Workflows

Postscript was built exclusively for Shopify from day one, and that focus shows in every part of the product. The integration with Shopify is tighter than any competitor — Postscript can trigger on virtually any Shopify event, including product views, collection visits, search queries, and custom metafield values. If your store relies on complex Shopify data to drive personalisation, Postscript is the natural choice.

Postscript’s keyword and conversational SMS features are industry-leading. You can set up automated keyword responses (reply RESTOCK to be notified when this item comes back), run two-way conversations at scale, and route incoming messages to your support team when needed. For brands with strong community engagement or high customer service volumes via text, this functionality is invaluable.

Pricing in 2026 starts at $100 per month for up to 2,500 SMS sends, with per-message costs ranging from $0.0085 to $0.015 depending on your plan tier and message type. MMS messages cost approximately three times the rate of standard SMS. There is no free tier for sending, though Postscript offers a 30-day trial with $1,000 in free message credits for new merchants.

Postscript works best for: Shopify stores doing $250k–$5M annually, brands with complex product catalogues that need event-driven automation, stores where two-way messaging and customer conversations are a priority, and DTC brands with strong community identity who want to build personalised SMS experiences.

SMSBump (Yotpo SMS): Best for Value and Yotpo Ecosystem Users

SMSBump was acquired by Yotpo in 2021 and has been progressively integrated into the Yotpo loyalty, reviews, and subscriptions ecosystem. In 2026, if your Shopify store already uses Yotpo Reviews, Loyalty, or Subscriptions, the case for SMSBump is compelling: cross-platform triggers allow you to send SMS messages based on review events, loyalty point milestones, and subscription status changes in ways that are difficult or impossible to replicate with other SMS tools.

Standalone, SMSBump remains one of the most accessible entry points into Shopify SMS marketing. The free tier allows up to 500 contacts and basic automations, making it the right choice for Shopify stores just getting started with SMS. The paid tiers start at $19 per month and scale affordably for growing stores.

The campaign builder is intuitive and well-designed, with a solid library of pre-built automation templates covering abandoned cart, welcome series, win-back, and post-purchase flows. For store owners who want to launch quickly without a steep learning curve, SMSBump’s template library is the fastest path to a functioning SMS programme.

Where SMSBump falls short is in advanced segmentation and AI-driven optimisation. Power users will hit the ceiling of the segmentation builder faster than with Attentive or even Postscript. Customer support responsiveness has also been a consistent criticism in the Shopify community, particularly for merchants on lower-tier plans.

SMSBump works best for: early-stage Shopify stores (under $500k annual revenue), Yotpo ecosystem users who want unified loyalty and SMS workflows, stores that need a low-cost starting point before graduating to a premium platform, and merchants who want an extensive template library for quick deployment.

Attentive: Best for High-Volume Scaling Brands

Attentive is the enterprise choice in the Shopify SMS marketing space. The platform powers SMS programmes for hundreds of eight and nine-figure DTC brands, and its feature set reflects that scale of ambition. In 2026, Attentive’s AI product — Attentive AI — has matured significantly, offering autonomous send-time optimisation, predictive audience segmentation, and AI-generated message copy that adapts tone and urgency based on subscriber behaviour patterns.

Attentive’s two-tap mobile opt-in technology consistently delivers the highest subscriber conversion rates of any platform — typically 8–15% of mobile visitors who see the opt-in convert to SMS subscribers, compared to 3–6% industry average. Over a 12-month period, this compounding difference in list growth rate can translate to tens of thousands of additional subscribers for high-traffic stores.

The reporting suite is the most comprehensive available. Attribution modelling, cohort analysis, journey analytics, A/B test results, and revenue forecasting are all available natively without third-party tools. For marketing teams that are data-driven and report regularly to leadership on channel ROI, Attentive’s analytics are in a different league.

The downside is cost. Attentive is not transparent about pricing publicly, but most Shopify stores pay $1,500–$5,000 per month depending on list size and message volume. The platform also has a minimum contract term (typically 12 months) and an onboarding fee. For stores generating under $1M annually, the economics are difficult to justify.

Attentive works best for: Shopify stores doing $1M or more annually, brands with large marketing teams who need advanced analytics and reporting, high-traffic stores where superior opt-in conversion rates compound into significant list size advantages, and businesses running complex multi-channel campaigns that need enterprise-grade segmentation.

Head-to-Head Feature Comparison

Feature	Postscript	SMSBump	Attentive
Free tier	Trial only	Yes (500 contacts)	No
Starting price	$100/month	$19/month	~$1,500/month
AI optimisation	Basic	Limited	Advanced
Two-way messaging	Excellent	Basic	Good
Shopify events depth	Deepest	Good	Good
Opt-in conversion tools	Good	Good	Best-in-class

Other Notable Contenders

Beyond the big three, several other SMS platforms are worth considering depending on your specific needs. Klaviyo SMS is an excellent choice if you are already using Klaviyo for email — unified subscriber profiles, combined flows, and single-platform reporting make the email-SMS combination particularly powerful. Omnisend similarly bundles SMS into a broader omnichannel marketing suite at competitive pricing.

For UK and European Shopify stores, Dotdigital and Brevo (formerly Sendinblue) offer strong SMS capabilities with better native support for EU compliance requirements, GDPR consent logging, and multi-country sender ID management. If a significant portion of your customer base is outside North America, these platforms often handle international SMS routing more cost-effectively than US-focused tools.

How to Choose the Right Platform for Your Store

Start by answering three questions. First, what is your current annual Shopify revenue? Under $500k: start with SMSBump. $500k to $2M: evaluate Postscript or Klaviyo SMS. Over $2M: seriously evaluate Attentive. Second, what other marketing tools are you using? If you are deep in the Yotpo ecosystem, SMSBump is the obvious choice. If you use Klaviyo for email, Klaviyo SMS is worth evaluating seriously. Third, how important is two-way conversational SMS to your brand experience? If you want customers texting back and having real conversations, Postscript is the clear winner.

If you would like a personalised recommendation based on your store’s specific situation, our team at Oneonic has helped dozens of Shopify brands evaluate and migrate between SMS platforms. View our Shopify marketing services or get in touch for a free platform recommendation based on your store size, product category, and growth goals. You can also see examples of the SMS programmes we have built for clients in our work portfolio.