Quick verdict
Postscript is worth investigating for the use cases below, but this is not a scored or final recommendation. BestStorefront has researched its public documentation; hands-on workflow, support, billing, and reliability testing are still pending.
Fit
Best for
- Shopify merchants investigating SMS as a retention channel.
- Teams that want published software fees and per-message rates to model cost.
- Operators who prefer optional contracts and monthly billing.
Limits
Who should skip it or consider alternatives
- Non-Shopify stores should verify platform fit first.
- Teams needing broad multichannel orchestration should compare scope carefully.
- Anyone ignoring carrier fees and message segmentation will underestimate cost.
Product role
What it does
Postscript is a Shopify-focused SMS and RCS retention platform. Its pricing page also references email and AI offerings; this preview centers on SMS/RCS for Shopify merchants.
SMS / MMS
Published per-message rates by plan.
RCS
Referenced as a channel; verify availability and pricing.
Shopify orientation
The product is built around Shopify retention.
Sender options
Toll-free numbers available; dedicated short code optional.
Connections
Integrations and ecosystem
Postscript is Shopify-focused. Verify order and event sync, subscriber data, consent capture, integrations with your email platform, exports, and API access.
Commercial terms
Pricing: verify the current offer
Starter: $0/month software with a $49 monthly minimum spend; $0.009/SMS and $0.045/MMS plus carrier fees. Growth: $100/month; $0.008/SMS, $0.03/MMS. Professional: $500/month; $0.007/SMS, $0.024/MMS. Enterprise: custom. Rates listed are for the US (50 states) and Canada, and carrier fees apply. A dedicated short code adds a $750/month carrier fee if chosen. Long messages can split into multiple billed segments. A 30-day free trial includes a $100 credit toward message and carrier fees; contracts are optional with monthly billing available per the FAQ. Checked Oct 7, 2026.
| Plan | Software | SMS / MMS (+ carrier fees) |
|---|---|---|
| Starter | $0/mo · $49 monthly minimum spend | $0.009 / $0.045 |
| Growth | $100/mo | $0.008 / $0.03 |
| Professional | $500/mo | $0.007 / $0.024 |
| Enterprise | Custom | Custom |
Last verified: Oct 7, 2026 against first-party pages.
Check current official pricingBilling definitions
Know what you are billed for
Lifecycle platforms bill on different units: active profiles, contacts, subscribers, sends, messages, segments, channels, or add-ons. The same list can produce very different invoices depending on how each vendor counts it.
Integration, reporting, and compliance
Questions to verify before purchase
- Confirm storefront, catalog, order, event, and customer sync depth, latency, and historical backfill.
- Ask how attributed revenue is defined—window, channel, click versus open/view, and deduplication—and whether holdouts are available.
- Review deliverability tooling, sender authentication, list hygiene, and suppression handling.
- Map consent capture, opt-in records, quiet hours, regional messaging rules, and opt-out handling.
- Scope migration: flows, templates, segments, historical data, consent records, API access, and export after termination.
Pros and tradeoffs
Research observations
Shopify specialization
Scope and integrations center on Shopify.
Transparent unit pricing
Published software and per-message rates make scenario modeling possible.
Hidden multipliers
Carrier fees and message segmentation can raise effective cost.
Evidence pending
Deliverability, support, and results are untested.
Shortlist
Alternatives to investigate
Attentive
Broader SMS/email/RCS/push with custom pricing.
Klaviyo
Email + SMS on a shared customer-data layer.
Omnisend
Ecommerce email + SMS across multiple storefronts.
Evidence status
Our evidence
This page is based on first-party sources. BestStorefront has not yet created an account or run hands-on tests for this product.
| Evidence | Status | Detail |
|---|---|---|
| Official documentation reviewed | Verified | First-party product, pricing and help pages linked below. |
| Pricing independently verified | Source-checked | Compared with the official pricing page (Oct 7, 2026). |
| Account created | Not tested | No BestStorefront test account yet. |
| Core workflows tested | Not tested | Category protocol tasks. |
| Support contacted | Not tested | Vendor support response. |
| Billing tested | Not tested | Invoice reconciled against published pricing. |
| Cancellation / export tested | Not tested | Exit path and data portability. |
Hands-on agenda
What we still need to test
- Connect a representative storefront and audit profile, order, catalog, and event sync accuracy.
- Build welcome, abandonment, post-purchase, and winback flows; record setup time and limitations.
- Send controlled test campaigns and document deliverability setup, rendering, and suppression behavior.
- Run a holdout where supported and compare attributed revenue with incremental estimates.
- Reconcile invoices against profiles, contacts, sends, message segments, carrier fees, and add-ons.
- Export profiles, consent records, and event data; document exit and migration burden.
Standard lifecycle, email and sms protocol — tasks every product in this category goes through:
- Import contacts and confirm consent fields
- Build a segment from behavioral and order data
- Create and send a campaign
- Build and trigger an automation
- Review campaign and revenue reporting
- Test suppression, unsubscribe and consent handling
- Export contacts and cancel the plan
No score or final verdict will be added until this work is complete.
Documentation
Sources and official product
This overview is based on the vendor's public documentation. Feature availability and commercial terms can change; verify details with the vendor.
Decision support
Frequently asked questions
Is Postscript free to start?
Starter has a $0 software fee but a $49 monthly minimum spend, plus per-message and carrier fees.
What are carrier fees?
Pass-through fees charged by mobile carriers on top of Postscript's per-message rates. Postscript's pricing page lists average US carrier fees of $0.0033 per SMS and $0.00799 per MMS, passed through at cost (checked Oct 7, 2026).
Is this a completed review?
No. This is an independent editorial overview; hands-on testing is pending.
What changed
- Oct 7, 2026: Added Postscript's published average US carrier fees per SMS and MMS.