Best SMS Marketing Software 2021

Postscript vs. SMSBump

Is Postscript or SMSBump the better solution for you? This in-depth, feature-by-feature breakdown will help you decide which SMS marketing tool is the best fit for your ecommerce business.

SMS marketing software includes features like subscriber list building, segmentation, text campaign creation, and automations. All-in-one solutions cater to a wide range of businesses from churches to dental practices. However, these two software solutions are tailored specifically for ecommerce businesses.

This article will discuss the differences between two of the largest players in this space: Postscript and SMSBump. We’ll discuss the notable strengths and weaknesses of each tool, as well as providing recommendations for who each tool will suit best.

All of our recommendations are based on research, product demos with the software companies, and dozens of hours spent hand-testing the SMS marketing tools. More details regarding our research process can be found on our SMS marketing category page.

Postscript & SMSBump Comparison Summary

We researched and personally tested both Postscript and SMSBump. Postscript received a SoftwarePundit Analyst Rating of 85 and SMSBump received a rating of 88.

Postscript was rated lower because it has limited custom fields, is missing crucial Shopify analytics, and a lack of pre-built campaigns. SMSBump received its high rating because it provides more ways to execute targeted campaigns, and comes with a plethora of segment conditions that are designed specifically for ecommerce businesses.

CriteriaAnalyst RatingFeaturesUsabilityPricingCustomer Support

In terms of pricing, Postscript begins at $0.01 per message, making it one of the most affordable SMS marketing solutions on the market. Costs per message decrease with higher plans. SMSBump’s pricing starts at $0.0149. However, unlike Postscript, SMSBump has monthly platform fees that start at $19 dollars.

Both solutions offer the standard features found across SMS marketing tools. These include subscriber list building, segmentations, campaigns, automations, and more. SMSBump’s campaigns and segmentation are its strongest features. However, one unique strength of Postscript is its autoresponders.

Overall, Postscript is best for Shopify businesses looking for a highly affordable SMS marketing solution. We found that it excels in the most important aspects of SMS marketing but has limited opportunities for complex campaigns. SMSBump, however, is preferable for Shopify or BigCommerce stores looking to create powerful campaigns to improve customer engagement and retention

Here’s a quick breakdown of who will prefer each option:

You'll prefer Postscript if:

  • You are looking for the most affordable solution for Shopify
  • You primarily send text blasts or general automations like abandoned cart messages
  • You don’t need robust analytics

Try Postscript Today

You'll prefer SMSBump if:

  • You use Shopify or BigCommerce
  • You want to leverage advanced segmentation to target your customers with personalized messages
  • You want to create complex flows based on customer actions

Try SMSBump Today

Table of Contents

Postscript & SMSBump Price Comparison

Overall, Postscript is more affordable than SMSBump. . Postscript’s prices are solely based on messages sent per month. In contrast, SMSBump charges a platform fee plus per message.

Postscript Pricing Details

Postscript pricing begins at $0.01 per message. Rates per message decrease as you choose to send more messages per month. Postscript has no platform fee, which means its features are available to all users. Here are some estimates we calculated you might spend:

Messages Sent2,5005,00010,00020,00030,30040,40050,500



SMSBump Pricing Details

SMSBump pricing starts at $19 dollars per month and $0.0149 per message. Message rates decrease as you choose more expensive plans. There is also a free option available that has no monthly platform fee, but we only suggest this for those looking to carry out basic SMS marketing strategies.

Plan NamePriceFeatures
  • SMS campaigns and automations
  • Primary subscription tools
  • Audience segmentation
  • ROI and performance Analytics
  • 24/7 email and chat support
  • All Free features
  • SMS flow builder
  • Keyword subscriber collection
  • Advanced analytics
  • Integrate your tech stack
  • All Growth features
  • Full suite of subscriber collection tools
  • Export analytics and reports
  • Priority email and chat support
  • All Prime features
  • Conversational SMS flows
  • Unlimited A/B testing
  • AI-powered predictive segmentation
  • Dedicated onboarding specialist
EnterpriseContact SMSBump
  • All powerhouse features
  • Custom reporting
  • Dedicated short code
  • Enterprise client success manager

Postscript & SMSBump Feature Comparison

Postscript and SMSBump are similar in the features that they offer, but SMSBump’s features are generally far more robust. This is especially true when it comes to subscriber list building options, campaigns, segmentations, and automations.

For a full analysis of each solution’s features, read our Postscript and SMSBump reviews.

Shopify IntegrationYesYes
BigCommerce IntegrationNoYes
Team membersNoNo
Subscriber list buildingYesYes
Message CreationYesYes
Campaign buildingYesYes (stronger)
Two-Way ConversationsYesYes
AnalyticsYesYes (stronger)
Robust integrationsYesYes
A/B testingYesYes
Custom fieldsYesYes

Subscriber List Building

SMSBump has more list building options than Postscript. This gives your business more opportunities to capture both potential and existing customers for future engagement and retention strategies.


As you can see above, SMSBump gives you the option to acquire subscribers through pop-ups, keywords, shareable subscribe links, and more. New options such as footer collections and social opt-ins are also in development and will be available soon.

Postscript, on the other hand, only has four options for subscriber list building.



Although both Postscript and SMSBump primarily feature custom campaigns, SMSBump’s campaign flow creator is one of the most powerful campaign creators we’ve analyzed.


Flows utilize both automations and segmentations to construct highly personalized campaigns, usually centered around customer retention. Although this is a rather complex campaign type reminiscent of drip campaigns, we found that flows are designed to help new users as well. They come with a number of customizable templates:

  • Abandoned Cart
  • Browse Abandonment
  • Customer Winback
  • Post Purchase
  • New Subscriber
  • Transactional

Campaigns in Postscript are more simple. You’re limited strictly to custom campaigns. Due to the fact that you cannot utilize prebuilt campaigns or drip campaigns, your opportunities to engage with customers in highly personalized ways are limited.



Segmentation is more robust and user-friendly in SMSBump than it is in Postscript. This is primarily due to the fact that SMSBump has more segment conditions, particularly in regards to customer behavior.


SMSBump’s segmentation design is also more modern and streamlined. This makes the process of segmentation easier for both new and experienced SMS marketers.

SMSBump also has more segment conditions than Postscript. This is especially true in regards to customer behavior conditions Postscript can segment based on your customer’s purchased products, product types, last order dates, and total spent. SMSBump, however, offers the following:

  • Money spent
  • Number of orders
  • Placed an order
  • Not ordered since
  • Ordered or not ordered specific product(s)
  • Ordered from or not ordered from a collection
  • Abandoned an order


Automations are actions triggered by specific events. The most common use cases of automations in SMS marketing include autoresponders, customers being categorized into different lists, and more. SMSBump’s automations are more powerful than Postscripts due to campaign flows. Still, Postscript’s automations are its best feature and worth the affordability of the product.

Postscript’s autoresponder creator, its primary automation feature, is shown below:


As you can see above, autoresponders are activated depending on specific triggers. In this case, the automation is sent when a checkout process has started. Where Postscript becomes slightly more advanced than SMSBump is the fact that you filter your triggers. This is a powerful way to create segmentations directly in the automation page, streamlining your workflow.

Although SMSBump’s autoresponders are less advanced in comparison to Postscript’s, ultimately, the addition of campaign flows puts SMSBump ahead. As we mentioned earlier, campaign flows create highly targeted automations based on multiple triggers. They are a very powerful way to create campaigns and boost ROI for your Shopify or BigCommerce store.

Bottom Line

Overall, Postscript is not as robust as SMSBump, but is effective for Shopify ecommerce businesses looking for an affordable SMS marketing solution. Relative to its price, it excels in the most important aspects of SMS marketing.

SMSBump, although the more expensive solution, is ultimately the ideal tool for ecommerce businesses looking to build powerful campaigns built around customer retention and engagement. Its design is intuitive and easy to use, but doesn’t sacrifice its most powerful features in being so.

If you’re interested, visit Postscript or SMSBump today to get started.

Yousef Fatehpour

Yousef Fatehpour is a Junior Research Analyst at SoftwarePundit. He graduated from University of California, San Diego, where he studied Human Centered Design and Communications. His work at UCSD's Design Lab emphasized UX research and product management.

Yousef's primary areas of interest are software design, user journeys, and how user experience is handled across software markets. Yousef also has experience in product design and multimedia content production. You can connect with Yousef on LinkedIn.

Yousef is an expert in several software categories including:

  • SMS marketing software
  • Document management software
  • Human resource software
  • Applicant tracking software
  • Design software

Get the latest from SoftwarePundit

We'll share our latest software reviews, technology tips, and deals.