Postscript Review 2026: Complete Deep Dive (Features, Pricing, Issues, Alternatives)

Postscript is an SMS marketing platform built primarily for ecommerce brands. It combines list growth, campaigns, automated flows, segmentation, two-way messaging, AI shopping assistance, and compliance tools.

Its Starter plan has no platform subscription fee, but it requires at least $49 in monthly usage. Every message carries a usage charge, and carrier fees are added separately.

Quick verdict: Postscript is a strong SMS platform for Shopify-centered ecommerce brands that treat texting as a major revenue channel. When a business needs SMS inside a wider CRM, pipeline, email, scheduling, funnel, and reputation system, SmartChat AI provisions that SmartChat CRM platform with a 24/7 AI front desk on top.

What Is Postscript?

Postscript is an ecommerce messaging platform focused on SMS, MMS, RCS, conversational commerce, and AI-assisted shopping experiences.

Its products include:

• SMS and MMS campaigns
• Automated customer journeys
• Subscriber growth tools
• Shopify segmentation
• Two-way conversations
• AI shopping assistance
• Message testing
• Compliance controls
• Managed SMS strategy
• RCS messaging
• Cashback promotions

Postscript is closely associated with Shopify, although it also provides an SDK for qualifying custom and headless storefronts.

Complete Feature Breakdown

SMS and MMS Campaigns — 9/10

Postscript allows brands to create promotional campaigns, target segments, schedule messages, shorten links, and monitor results.

The platform supports both SMS and MMS. SMS works for concise text and links, while MMS can contain media and longer content.

Message length affects billing:

• Standard SMS: 160 characters without emojis
• SMS with emojis: 70 characters
• Longer texts are split into separately billed segments
• MMS supports up to 1,600 characters with or without emojis

Copywriters must account for segmentation before scheduling large campaigns. A message that looks like one text in the editor can generate several billable SMS segments.

Marketing Automation — 9/10

Postscript includes a visual flow builder and prebuilt automation templates.

Common workflows include:

• Welcome sequences
• Cart abandonment
• Browse abandonment
• Post-purchase follow-up
• Shipping notifications
• Upsells
• Customer win-back
• Product recommendations

Automations can use Shopify and connected application data to target shoppers according to behavior, purchases, and customer attributes.

Segmentation — 8.5/10

All marketing plans include unlimited segments. Brands can build audiences using Shopify data and supported third-party integrations.

Useful criteria may include:

• Purchase history
• Order value
• Products purchased
• Browsing activity
• Cart behavior
• Subscriber source
• Engagement
• Customer status

The quality of segmentation depends on clean store data and correctly configured integrations.

List Growth — 8.5/10

Postscript provides pop-ups, landing experiences, keywords, checkout opt-ins, QR codes, and other subscriber-acquisition tools.

The platform includes consent language and compliance-oriented controls, but brands remain responsible for accurately describing their program and obtaining valid consent.

The trial allows two unique keywords.

Two-Way Conversations — 8.5/10

Teams can respond to shoppers through conversational SMS. This supports product questions, purchase guidance, customer service, and sales assistance.

High-volume brands should confirm user-management, assignment, response-time, history, and support integrations. Postscript is designed around commerce conversations rather than acting as a complete general-purpose help desk.

Postscript AI — 8/10

Postscript sells an AI plan that bundles several AI products, including:

• Brand Center
• Infinity Testing
• Shopper
• AI-powered messaging
• Product recommendations
• Brand-voice controls
• Knowledge-base management

Infinity Testing can test many campaign and automation variants. Shopper acts as an always-available one-to-one shopping assistant.

Public pricing for the AI bundle was not established. Obtain a written quote covering usage, included products, limits, training data, overages, and human-review controls.

RCS — 7.5/10

Postscript offers Rich Communication Services messaging with branded profiles and richer interactive content.

RCS availability depends on supported devices, carriers, regions, verification, and campaign configuration. SMS or MMS fallback behavior should be tested before relying on it.

Public RCS pricing and complete eligibility terms were not established.

Reporting and Attribution — 8/10

Postscript reports on campaign, flow, subscriber, and revenue performance. Higher plans provide stronger optimization and support features.

SMS-attributed revenue should not automatically be interpreted as incremental revenue. Attribution windows can count purchases that might have occurred without a message. Brands should use controlled tests where possible.

Postscript Plus — 8/10

Postscript Plus combines the platform with managed strategy and execution from in-house specialists.

It may suit brands that need help planning, running, and optimizing their SMS program. Public pricing is not provided, so the scope should be documented carefully.

Confirm:

• Strategy hours
• Campaign production volume
• Automation work
• Reporting cadence
• Testing responsibilities
• Approval process
• Contract term
• Performance expectations

What Postscript Does Not Include

Postscript does not provide a complete:

• Sales CRM
• Opportunity pipeline
• Business phone system
• Appointment scheduler
• Email marketing suite
• Website builder
• General-purpose funnel builder
• Reputation-management platform
• Social-media scheduler
• Accounting system
• Membership platform
• Full customer-service desk

It specializes in ecommerce messaging rather than the complete customer lifecycle.

Pricing Deep Dive

The Pricing Model

Postscript combines monthly platform pricing or minimum spending with per-message usage and carrier fees.

The listed message rates apply to the United States and Canada.

Current Plans

Plan	Monthly Platform Price	SMS Rate
Starter	$0, with $49 monthly minimum spend	$0.009
Growth	$100/month	$0.008
Professional	$500/month	$0.007
Enterprise	Custom	Custom

Carrier fees are separate. Postscript lists average US carrier fees of approximately:

• SMS: $0.00418
• MMS: $0.00841

These are averages rather than guaranteed universal rates. Carriers determine their charges, and Postscript states that it passes them through without markup.

Estimated Message Cost

Using the published average carrier fees:

Plan	Approximate SMS Cost	Approximate MMS Cost
Starter	$0.01318	$0.05341
Growth	$0.01218	$0.03841
Professional	$0.01118	$0.03241

These calculations exclude subscription fees, taxes, message segmentation, short codes, AI products, managed services, and other usage.

At 100,000 single-segment SMS messages, approximate message and average carrier charges would be:

• Starter: $1,318
• Growth: $1,218 plus $100 platform fee
• Professional: $1,118 plus $500 platform fee

Actual invoices depend on carriers, destinations, message types, and segmentation.

Free Trial

Postscript provides a $100 credit for the first 30 days. The credit applies to message and carrier fees.

If the credit is exhausted before the trial ends, or when the first 30 days finish, additional messages are charged at the Starter rate unless another package is selected.

Phone Numbers

Postscript offers two main number options:

• Verified toll-free number: Included for all merchants
• Dedicated short code: $750 per month through carriers

A dedicated short code may provide more consistent delivery for high-volume programs, but it adds a substantial fixed cost.

The Hidden Cost Stack

Potential additional costs include:

1. Monthly platform fees or minimum spend
2. SMS segments
3. MMS messages
4. Carrier surcharges
5. Dedicated short code
6. Postscript AI
7. Postscript Plus
8. RCS usage
9. Shopify and application subscriptions
10. List growth and promotional incentives
11. Compliance review and legal advice
12. Taxes and international usage

The lowest per-message rate is not always the least expensive plan. The fixed subscription must be compared with expected message volume.

Postscript vs SmartChat AI: Cost Comparison

Postscript’s Starter plan has no platform fee but requires at least $49 in monthly spend. Growth costs $100 per month, and Professional costs $500 per month before message and carrier charges.

SmartChat CRM’s standard platform prices — the platform SmartChat AI runs on — are:

• SmartChat CRM is provisioned through SmartChat’s annual plans at flat peso pricing rather than sold as separate tiers.

SmartChat CRM also charges separately for SMS, phone, email, AI, and selected premium services.

Postscript may be the stronger specialist for Shopify SMS marketing. SmartChat CRM includes CRM, pipelines, email campaigns, calls, calendars, funnels, forms, reputation management, and agency subaccounts.

A service business rarely needs Postscript’s ecommerce specialization. A high-volume Shopify brand may prefer Postscript even if it costs more. For Philippine businesses, SmartChat AI prices the broader platform in flat pesos — ₱2,699 per month equivalent billed annually for SMS + AI, ₱1,599 for SMS Only, unlimited contacts, up to 2,000 SMS per day per relay phone.

Reliability and Message Delivery

SMS delivery depends on Postscript, mobile carriers, number verification, content, consent quality, destination, device availability, and carrier filtering.

A sent or accepted message is not proof that the recipient viewed it. Carriers may delay or block traffic, especially when content, volume, or opt-in records create risk.

Brands should monitor:

• Delivery rates
• Opt-outs
• Complaints
• Link performance
• Conversion
• Carrier filtering
• Message segmentation
• Cost per incremental order

Known Issues and Common Complaints

1. Carrier Fees Are Added Separately

The advertised SMS and MMS prices do not include carrier surcharges.

2. Long Messages Can Multiply Costs

SMS messages exceeding 160 characters, or 70 characters when emojis are used, become multiple billable segments.

3. Starter Is Not Completely Free

The platform fee is $0, but the plan requires at least $49 in monthly spend.

4. Shopify Is the Primary Fit

Postscript is strongly designed around Shopify. Non-Shopify brands may need the SDK and additional technical work.

5. Advanced Products Lack Public Pricing

Postscript AI, Plus, RCS, and some Enterprise capabilities require a quote.

6. Dedicated Short Codes Are Expensive

A short code costs $750 per month before messages, carrier fees, and platform costs.

7. Attribution Can Overstate Impact

Reported SMS revenue can include customers who would have purchased without the message. Incrementality testing matters.

8. Compliance Remains the Brand’s Responsibility

Built-in safeguards reduce risk but do not remove the sender’s legal responsibility.

Customer Support Quality

Postscript offers email support and live chat Monday through Friday from 6 a.m. to 5 p.m. Pacific Time.

Growth includes live chat and email support. Professional adds priority live chat and email assistance. Enterprise includes priority live chat and custom service terms.

Brands requiring guaranteed response times or strategic services should obtain the applicable SLA and service scope in writing.

Integration Ecosystem

Postscript integrates with Shopify and ecommerce products for reviews, loyalty, customer service, subscriptions, personalization, and analytics.

Before adopting an integration, confirm:

• Supported customer and order data
• Real-time or delayed synchronization
• Consent transfer
• Unsubscribe handling
• Historical-data access
• Automation triggers
• Attribution behavior
• Additional fees

If your SMS program needs to connect to a CRM and booking system rather than a Shopify store, SmartChat AI provisions that SmartChat CRM stack for you — conversations, contacts, and pipelines in one system, with a 24/7 AI front desk included.

Security, Privacy, and Compliance

Postscript builds compliance controls around TCPA rules, carrier policies, opt-in language, keywords, quiet hours, and unsubscribe handling.

Businesses remain responsible for:

• Obtaining express consent
• Preserving consent records
• Describing recurring messages
• Disclosing message and data rates
• Honoring STOP and other opt-outs
• Following quiet-hour rules
• Maintaining accurate privacy policies
• Controlling access
• Reviewing campaign content
• Following state and federal requirements

Uploading an existing list requires compliance review. A customer’s email consent does not automatically provide permission to send marketing texts.

Who Is Postscript Actually Best For?

Ideal For

• Shopify ecommerce brands
• Retailers with active SMS lists
• Brands using cart-abandonment flows
• High-volume mobile marketers
• Teams wanting SMS strategy support
• Companies testing conversational commerce
• Stores seeking AI shopping assistance

Not Ideal For

• Local service businesses
• B2B sales teams
• Companies needing a complete CRM
• Businesses needing email and SMS in one base product
• Very small lists with limited campaign volume
• Non-ecommerce organizations
• Brands without documented SMS consent

Postscript vs SmartChat CRM: Feature-by-Feature

Feature	Postscript	SmartChat CRM
Ecommerce SMS marketing	Excellent	General-purpose
SMS and MMS campaigns	Strong	Strong
Shopify segmentation	Strong	Integration-dependent
Cart-abandonment flows	Strong	Available with integration
AI shopping assistant	Shopper	Broader conversational AI
Email marketing	No complete suite	Yes
Sales CRM	No	Yes
Opportunity pipelines	No	Yes
Business calling	No	Yes
Appointment calendars	No	Yes
Funnels and websites	Limited list-growth tools	Strong
Reputation management	No	Yes
Agency subaccounts	Limited	Strong
Dedicated short code	Available	Provider-dependent

Choose Postscript if:

• Shopify is central to the business
• SMS is a major ecommerce revenue channel
• You need store-based segmentation
• Cart and browse automations matter
• You want specialist SMS strategy
• You require conversational shopping tools

Choose SmartChat AI if:

• You operate a service business where leads come through SMS, Messenger, Instagram, or website chat.
• You want the SmartChat CRM platform — CRM pipelines, calendars, funnels, email — provisioned for you instead of self-configured.
• You want a 24/7 AI front desk answering, qualifying, and booking leads from your own knowledge base.
• You want SMS sent from your own Philippine business number through a postpaid SIM in a dedicated Android relay phone.
• Published peso pricing matters: ₱2,699 per month equivalent billed annually for SMS + AI, ₱1,599 for SMS Only, unlimited contacts.

Migration Considerations

Before moving an SMS program:

1. Export subscribers and consent records.
2. Separate active, unsubscribed, and invalid numbers.
3. Document signup sources and disclosure language.
4. Review whether consent is transferable.
5. Configure the toll-free number or short code.
6. Submit required verification.
7. Rebuild segments and flows.
8. Test links, coupons, and personalization.
9. Suppress unsubscribed contacts.
10. Begin with controlled campaigns.
11. Compare delivery and conversion data.
12. Retain records from the previous provider.

Do not upload an email list as an SMS list without valid text-message consent.

Final Verdict

Postscript is a specialist ecommerce SMS platform with strong Shopify data, campaign tools, automated flows, conversational messaging, and compliance-oriented list growth.

Its pricing is transparent at the core-plan level, but the total cost includes message charges, carrier fees, platform costs, segmentation, and optional products. High-volume brands should model the invoice rather than choosing a plan from its SMS rate alone.

Choose Postscript when Shopify SMS is a major growth channel — it genuinely wins that specialty. Choose SmartChat AI when messaging must operate inside a broader CRM, sales, appointment, and reputation system, and you want a 24/7 AI front desk answering Philippine customers on the channels they already use. Text 0917 315 4230 to see it work.