Maropost vs. Postscript:
Best Shopify SMS Marketing Software
This comparison reviews Maropost and Postscript SMS marketing software for ecommerce and Shopify teams. Compare text message marketing, SMS marketing automation, cart abandonment flows, compliance, two-way SMS, and reporting side by side.
SMS Marketing Software & Text Message Campaign Features
Maropost lets you broadcast promotional SMS, including sales, launches, and reminders, to lists of opted-in subscribers. This is Maropost's core bulk SMS use case for marketing, distinct from one-to-one transactional alerts.
Postscript lets Shopify merchants schedule one-time SMS campaigns to subscriber segments, sending a single message or short series on a chosen date and time.
Maropost supports MMS (Multimedia Messaging Service) so you can send images and GIFs with your texts, ideal for retail brands showing products visually. Available in US, Canada, and Australia.
Postscript supports MMS campaigns with images or GIFs and documents up to 1,600 characters per MMS message, with segment billing tied to message length and media.
Maropost simplifies SMS campaign creation in two steps: (1) compose your message and compliance details, (2) choose your audience, schedule, and send. The workflow is built for non-technical marketers.
Postscript builds campaigns and automations in the Visual Flow Builder, where marketers compose message content, branches, and delays before choosing audience and send timing.
Maropost includes a live preview panel that shows how your SMS or MMS will render on a mobile device as you type, helping you catch formatting issues before sending.
Postscript shows message previews while you build campaigns so you can review copy, media, and segment counts before scheduling a broadcast.
Maropost lets you insert contact tag merge fields into SMS content to personalize each message with profile data such as names, preferences, custom attributes, and more.
Postscript personalizes texts with Shopify customer data, dynamic variables, and product details pulled from your connected storefront.
Maropost lets you embed mobile keywords in campaign copy so recipients can text back a specific word (e.g. SALE, STOCK) to trigger automatic actions like list subscribe or coupon delivery.
Postscript supports unlimited opt-in keywords and keyword marketing programs, though promotional blasts more often drive clicks to links than embedding reply keywords inside every campaign.
Maropost gives you flexible send options: schedule SMS for a future date and time, send immediately with Send Now, or save campaigns as drafts to finish later.
Postscript lets teams schedule campaigns for a future date and time or launch sends once audience and compliance checks are complete.
Maropost schedules campaigns relative to each recipient's timezone when permitted sending hours use contact-local timezone mode, so messages arrive at appropriate local times.
Postscript enforces promotional quiet hours and documented sending windows for campaigns and automations, with platform-defined hour rules rather than full per-contact timezone scheduling on every send type.
Maropost's Compliance tab lets you control the order and visibility of required elements such as organization name, message body, company link, and opt-out instructions in the final text.
Postscript hard-wires TCPA and carrier compliance language into popups, forms, and checkout collection so required opt-in disclosures cannot be removed or edited by merchants.
Maropost supports transactional SMS for automated, event-triggered messages like order confirmations, password resets, and OTP codes. Create templates in the UI and trigger sends programmatically via REST API when events occur.
Postscript focuses on marketing SMS and Shopify-triggered automations through its app and API, rather than a separate marketer UI built only for one-off transactional REST deliver campaigns like order OTP tools.
SMS Compliance, 10DLC & Deliverability
Maropost helps teams meet US commercial SMS requirements with verified toll-free numbers or approved 10DLC. Unverified toll-free numbers have strict daily/weekly/monthly send limits. Maropost recommends toll-free over 10DLC for cost and approval speed.
Postscript manages toll-free number verification for brands and guides merchants through dedicated number and short code compliance checklists before high-volume sending.
Maropost lets you configure the legal window when SMS can be sent (default 9 AM to 6 PM) using campaign timezone or each contact's local timezone. Journey SMS auto-pauses outside this window.
Postscript applies permitted sending hours for promotional SMS and automations, blocking or deferring marketing sends outside configured waking-hour windows.
Maropost lets you set default organization name and company information link at the account level. These values auto-populate every new SMS campaign's Compliance tab.
Postscript embeds compliance defaults across list growth tools, with platform-managed legal language and checklist guidance for dedicated numbers and short codes.
Maropost supports compliant opt-in collection, but regulations require you to document how and when each contact opted in: timestamp, method, IP address, phone number, and identity. You must retain these records.
Postscript stores subscriber opt-in source, keyword, and consent records so merchants can document how each phone number joined the SMS program.
Maropost sends from a shared short code by default. You can request a dedicated 5–6 digit short code exclusive to your brand so recipients always see the same sender. Available on request via ClientSuccess@maropost.com.
Postscript offers dedicated short codes for brands that need higher throughput during peak sales periods, with a compliance checklist for short code programs.
Maropost uses a pool of shared short codes (US/Canada) and long codes (other countries) across clients. Each message may show a different sender number unless you purchase a dedicated short code.
Postscript assigns a dedicated toll-free number and custom contact card per brand rather than rotating shared short codes across unrelated senders on every message.
Maropost maintains an account-wide SMS Do Not Mail suppression list. Anyone on it will never receive SMS from your account, and contacts with permanent delivery failures are added automatically.
Postscript automatically processes STOP and related opt-out keywords, maintains suppression lists, and removes unsubscribed numbers from future campaigns.
Maropost warns you when scheduling a campaign outside permitted hours, with Pause (default) or Send Anyway options to prevent accidental compliance violations.
Postscript warns marketers when promotional sends fall outside permitted hours and applies safeguards so campaigns do not blast outside compliance windows.
Maropost lets you replace the default mpt1.co short domain with your own branded domain for SMS links. Add a CNAME DNS record and verify ownership in Settings.
Postscript shortens links in campaign messages for click tracking, while fully branded custom SMS link domains are not the primary default setup for every account.
Maropost supports teams messaging Texas residents under Texas Senate Bill 140 (effective Sept 2025), which requires registration via Form 3401, a $200 annual fee, and a $10,000 security deposit.
Postscript updates platform compliance as carrier and TCPA rules evolve, but merchants remain responsible for state-specific obligations such as Texas SB 140 where applicable.
Shopify SMS Marketing & Ecommerce List Growth
Maropost provides dedicated lists that store SMS subscribers separately from email lists. Each list has its own dashboard with subscriber statistics and management tools.
Postscript organizes subscribers in a native SMS CRM with segments built from Shopify purchase, browse, and profile data.
Maropost lets you build popup or embedded web forms to capture phone numbers and grow your SMS list directly from your website with compliant opt-in fields.
Postscript captures SMS opt-ins through desktop and mobile popups, onsite forms, checkout collection on Shopify Plus, QR codes, and keyword sign-up flows.
Maropost supports double opt-in when enabled on a form with a phone field: the SMS contact is only added after the subscriber confirms via email. You must disclose SMS consent clearly since double opt-in is email-based.
Postscript supports double opt-in options so brands can reconfirm consent after the initial signup before subscribers enter live campaigns.
Maropost lets you bulk import phone numbers from CSV or TXT files, mapping phone column, optional subscription status (S=Subscribed, U=Unsubscribed), and optional UID column.
Postscript lets merchants import an existing SMS list when the file meets compliance requirements, alongside Shopify sync and manual subscriber adds.
Maropost lets you target campaigns using contact lists, segments, or both. If a contact appears in multiple selected audiences, they receive the message only once.
Postscript targets campaigns and automations using Shopify-driven segments, tags, purchase history, and third-party integration data.
Maropost lets you exclude specific lists or segments from a campaign send, useful for suppressing recent buyers, VIPs already messaged, or other subsets.
Postscript maintains automatic global suppression for opt-outs and excluded subscribers so they do not receive promotional sends or automations.
Maropost's Shopify integration syncs phone numbers and sms_marketing_consent status in real time when customers opt in on your Shopify store.
Postscript is a Shopify Plus Certified partner with deep native sync for SMS marketing consent, customer phone numbers, and order events from your storefront.
Maropost's Retail Express integration syncs customer phone data and SMS subscription preferences so you can message retail customers from one platform.
Postscript does not provide a native Retail Express integration for syncing in-store retail customer phone fields and SMS preferences into its platform.
Maropost gives you control over when forms appear: on page load, exit intent, after scrolling a percentage, on specific URLs, or hide for X days after dismissal.
Postscript popups and onsite opt-in tools support targeting by page, visitor behavior, cart value, and referral source to control when forms appear.
Maropost landing pages can be used as destinations for SMS campaigns and as acquisition surfaces to collect mobile opt-ins.
Postscript provides keyword, QR, and landing-page opt-in experiences that route mobile visitors through a pre-filled text confirmation flow.
SMS Marketing Automation, Two-Way SMS & Journeys
Maropost lets you define mobile keywords, specific words or phrases (e.g. JOIN, SALE), that contacts can text to your number. Each keyword links to an action and an automatic response message.
Postscript supports unlimited keywords that subscribers can text to join a list, trigger an automation, or enter a promotional program.
Maropost sends a custom auto-reply instantly when a defined keyword is received. Replies can include coupon codes, links, or nested keywords.
Postscript sends automatic welcome and keyword reply messages through automations, including required legal language after a subscriber opts in.
Maropost handles inbound replies by matching text against active keywords within a 2-hour window. Valid keyword matches get the keyword response; everything else gets the invalid response.
Postscript includes response management so teams can read and reply to inbound subscriber texts from the Postscript dashboard.
Maropost supports text-to-win contests: promote a keyword (e.g. WIN2026), add contacts who text in to a list, then pick a winner from subscribers and notify them via SMS.
Postscript can run contest and giveaway flows by collecting keyword entries into a subscriber list and messaging winners from that audience.
Maropost powers back-in-stock alerts with keywords on out-of-stock product pages (e.g. STOCK42). When the item is restocked, deactivate the keyword and Maropost SMS everyone who subscribed with a link to buy.
Postscript automations can trigger back-in-stock and product-interest messages when connected to Shopify inventory and shopper behavior events.
Maropost lets you add an SMS step inside automated customer journeys alongside email actions. The journey engine sends the right text at the right point in the customer lifecycle without manual intervention.
Postscript Visual Flow Builder adds Send Message steps to automations for welcome, cart abandonment, browse abandonment, shipping, and upsell journeys.
Maropost's Send SMS journey widget includes its own Compliance tab so you can verify legal content before the journey goes live.
Postscript applies compliance language and opt-out handling inside automated flows so journey messages follow the same TCPA rules as broadcasts.
Maropost automatically pauses journey SMS messages when they would send outside permitted hours for a contact's timezone, then resumes when the window opens.
Postscript pauses or defers automation sends outside permitted promotional and automation quiet-hour windows according to platform rules.
Maropost skips the Send SMS journey step silently when a contact has no linked SMS phone record, then continues them to the next journey action.
Postscript flow branching uses Shopify conditions, delays, and subscriber status so contacts without consent or valid numbers follow alternate paths.
Maropost delivers transactional SMS for automated, event-triggered messages like order confirmations, password resets, and OTP codes. Create templates in the UI and trigger sends programmatically via REST API when events occur.
Postscript exposes a REST API and Custom Events so external systems can add subscribers or trigger automations, though it is not a dedicated transactional SMS campaign editor.
SMS Marketing Platform Analytics & Attribution
Maropost provides a per-campaign dashboard after send with message preview, performance tiles (sends, delivered, replies, clicks), drill-down reports, and campaign metadata.
Postscript provides campaign and message analytics dashboards with delivery, clicks, unsubscribes, and revenue metrics updated throughout the day.
Maropost shortens all URLs in your SMS body to trackable links on mpt1.co when click tracking is enabled (default ON), so you can measure clicks per link in the campaign dashboard.
Postscript tracks clicks on shortened campaign links and ties message engagement back to individual sends in reporting exports.
Maropost tracks revenue generated from SMS campaigns alongside delivery and engagement metrics so you can measure ROI of your text marketing.
Postscript attributes revenue to SMS and MMS using Shopify order data and a configurable attribution window, commonly twenty-four-hour click attribution by default.
Maropost's Contact 360 profile shows SMS-specific analytics per person: sends, opens, clicks, bounces, campaign history, and keyword interactions in one unified view.
Postscript subscriber profiles in its native CRM show opt-in source, keyword history, and message engagement for individual customers.
Maropost lets you build scheduled or one-time reports across selected SMS campaigns with metrics like delivery rate, reply rate, bounce rate, and unsubscribe rate. Export as CSV, XLS, PDF, or XLSX.
Postscript Reports exports campaign, automation, and keyword performance with revenue, earnings per message, and message-type breakdowns.
Maropost provides a billing-focused report showing every individual message segment sent or received, with segment counts, message type (campaign, test, keyword reply), and timestamps.
Postscript message analytics exports include SMS and MMS counts, message type, revenue per message, and IDs for campaigns, automations, and keywords.
Maropost's main Dashboard includes an SMS Volume widget showing outbound and inbound message counts over time as a line chart for account-level monitoring.
Postscript Subscriber Analytics summarizes list growth, opt-in source performance, and message volume across acquisition channels.
Maropost's Account & Billing Usage section shows your real-time SMS consumption alongside email, filterable by month or year.
Postscript bills per SMS and MMS message with plan tiers based on subscriber count, and usage visible through messaging and billing reports.
Maropost lets you schedule custom SMS reports to run daily, weekly, or monthly and email results automatically. Date ranges use Eastern Time.
Postscript lets merchants export analytics to spreadsheets from Reports and Data and Insights, with downloads available from the reports page.
Maropost lets you download SMS send reports and custom reports as Excel (.xlsx) files for offline analysis and sharing with stakeholders.
Postscript supports spreadsheet exports of subscriber, revenue, and message performance data for offline analysis and stakeholder sharing.