Postscript is live · free plan, paid from $100/mo · last verified 8 Nov 2026 · viability healthy
Postscript
AI retention marketing for Shopify brands — SMS, RCS, and email on one agentic platform.
For Shopify brands where SMS or RCS already ranks among the top revenue channels, Postscript is a serious contender — the shared Identity Resolution profile and agentic tooling are the reasons to look past a legacy SMS vendor. The math only works if you're sending real volume, though: Starter's $49 minimum plus carrier fees is dead weight for small lists, and the $699/mo AI Plan is a second bill on top of your marketing tier.
Verdict generatedVerified 5d ago · liveness 85/100 · cite: rightaichoice.com/tools/postscript
- Shopify DTC brands where SMS or RCS is a top revenue channel
- Retention teams that want automated, on-brand variant testing at scale
- Brands ready to add email on the same profile as SMS and RCS
- US and Canada senders who want built-in compliance support and transparent per-message rates
- Stores on WooCommerce, BigCommerce, or other non-Shopify platforms
- Small senders who won't clear the $49 monthly minimum spend plus per-message and carrier fees
- Teams that need push notifications alongside SMS, RCS, and email
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Skip Postscript if you run a non-Shopify store, or if your send volume is small enough that a $49 monthly minimum plus a separate $699/mo Postscript AI Plan never pays back.
Starter is advertised at $0/mo but carries a $49 monthly minimum spend, so light months still bill you $49.
The marketing ladder — $0/mo Starter with a $49 monthly minimum spend, $100/mo Growth, $500/mo Professional — is priced for Shopify brands sending SMS at real volume, where the declining per-message rates ($0.009 → $0.008 → $0.007/SMS) actually pay off. Add the $699/mo Postscript AI Plan and a mid-size brand is committing well over $1,000/mo before messages. Klaviyo bundles email and SMS with AI features at lower entry cost; Attentive competes on managed service. Postscript is the better deal
In short
Postscript — AI retention marketing for Shopify brands — SMS, RCS, and email on one agentic platform. Best for Shopify DTC brands where SMS or RCS is a top revenue channel, Retention teams that want automated, on-brand variant testing at scale, Brands ready to add email on the same profile as SMS and RCS. Free to start; paid plans from $100/mo.
No head-to-head comparison for Postscript yet — the alternatives below are the closest matches we list.
What is Postscript?
Postscript — AI retention marketing for Shopify brands — SMS, RCS, and email on one agentic platform. Best for Shopify DTC brands where SMS or RCS is a top revenue channel, Retention teams that want automated, on-brand variant testing at scale, Brands ready to add email on the same profile as SMS and RCS. Free to start; paid plans from $100/mo.
Postscript is a retention marketing platform built for Shopify DTC brands that treat SMS, RCS, or email as revenue channels rather than side projects. The company rebuilt its stack from scratch as Postscript 2.0 instead of layering AI onto older software, and the foundation is the Agentic Context Platform (ACP): a single store of brand context (tone, offers, catalogue, knowledge base) and customer context that AI agents read from and act on at the individual subscriber level. ACP ships with every marketing plan at no extra cost. The revenue products sit on top. Brand Center governs how AI messages sound, what they know, and which offers they can use. Infinity Testing runs many campaign and automation variants at once. Shopper drives 1:1 agentic journeys that assemble messages from each subscriber's behavior. List growth runs through patented Onsite Opt-in, a popup editor with group A/B testing and checkbox collection, plus CashBack, a coupon alternative with built-in testing. Channels now span SMS, RCS (an Enterprise add-on), and Email, which launched in September 2025 alongside Identity Resolution — one profile unifying emails, phone numbers, and Shopify records — with four attribution models and migration tooling from other providers. Campaigns and automations run through a Visual Flow Builder with cart abandonment, browse abandonment, welcome, upsell, and shipping templates. A free trial credits $100 toward message and carrier fees for 30 days. On cost, Postscript publishes its rates rather than hiding them: Starter is $0/mo with a $49 monthly minimum spend and $0.009/SMS, Growth is $100/mo, Professional (the most popular tier) is $500/mo with API access, and Enterprise is custom. AI products bundle into a separate $699/mo Postscript AI Plan. Against Klaviyo or Attentive, the argument is one data layer across channels and lower base send rates — with the tradeoff that the AI layer is priced separately.
Key features
- SMS marketing campaigns and automations built on Shopify data
- RCS rich messaging from a branded profile (Enterprise add-on)
- Email channel on an AI-native foundation, launched September 2025
- Agentic Context Platform (ACP) holding brand and customer context, included on every plan
- Brand Center for AI message tone, voice, knowledge base, offers, and product catalogue
- Infinity Testing: hundreds of on-brand campaign and automation variants
- Shopper AI-powered 1:1 agentic marketing journeys
- Visual Flow Builder with cart abandonment, browse abandonment, welcome, upsell, and shipping templates
- Patented Onsite Opt-in list growth technology
- Popup editor with group A/B testing and checkbox collection
- CashBack (Fondue) coupon alternative with built-in A/B testing
- Identity Resolution unifying emails, phone numbers, and Shopify records
- Four attribution models and custom attribution windows
- Free trial with $100 credit toward message and carrier fees
- API access for custom integrations on Professional and above
Behind the verdict
The first question with Postscript isn't "is the AI good" — it's "how much do you send?" Published per-message rates ($0.009/SMS on Starter dropping to $0.007 on Professional, plus carrier fees around $0.00330 for SMS in the US) reward brands with volume. A shop sending a few hundred texts a month will clear the $49 minimum on Starter and see little of what makes the platform interesting. Where we'd reach for it: a Shopify brand running SMS as a top-three channel that keeps bolting tools together to reach customers. The pitch of one profile across SMS, RCS, and email — with Identity Resolution merging phone numbers, emails, and Shopify records — is the practical win. No more reconciling lists across three vendors. When to pass. Non-Shopify stores (WooCommerce, BigCommerce) are out; the platform's data layer is built around Shopify. Brands that want AI folded into the base subscription should also look elsewhere or budget the $699/mo Postscript AI Plan as a distinct line item, because Shopper, Infinity Testing, and Brand Center live there. Compared with Klaviyo, the closest alternative for a Shopify email-plus-SMS shop, Postscript's angle is channel parity on an AI-native foundation and lower base send rates, with the caveat that the AI products are a separate purchase. Klaviyo's appeal is one consolidated bill. Real-world caveats. RCS is an Enterprise add-on, not a standard channel, so don't plan around it on Growth. A dedicated short code, if you need one, runs $750/month passed through at cost to the carriers. And the free trial's $100 credit is applied to message and carrier fees — once it's gone, you're on the Free-tier rate for additional sends.
Models under the hood
as of 2026-11-08
Limitations
- Postscript is purpose-built for Shopify brands, with the platform deeply integrated into the Shopify ecosystem.
- Pricing is usage-based and transparent on the surface (SMS & RCS Starter $0/mo with a $49 monthly minimum spend, $0.009/SMS and $0.045/MMS plus carrier fees; Growth $100/mo), but the real cost depends on send volume and carrier fees.
- RCS is positioned as a rich-messaging channel with a branded profile, and the AI products are built on the Agentic Context Platform (ACP) plus Brand Center.
as of 2026-10-20
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Is Postscript still active?
Postscript is live · free plan, paid from $100/mo · last verified 8 Nov 2026 · viability healthy.
Viability score
How well maintained and how widely used is Postscript? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: November 2026
How we score →What do users say about Postscript?
What people actually say about Postscript — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
ResearchedDiscussed by users across 5 sources (Hacker News, YouTube, Product Hunt, Stack Overflow, Lemmy) · researched Oct 15, 2026.
Weighted by the 72 posts each of 5 sources contributed.
- +Shopify-native data model means segments and flows run on real store behavior, not stale syncs
- +SMS and email now share one data layer, avoiding the classic bolted-together channel mess
- +Onsite opt-in and popup A/B testing are included, helping list growth without extra tools
- +Visual Flow Builder ships with cart, browse, welcome, upsell, and shipping templates out of the box
- +Product Hunt users specifically praise VIP drop campaigns and describe customer service as great
- −Shopify-only positioning shuts out WooCommerce, BigCommerce, and custom-stack merchants entirely
- −No Reddit, Trustpilot, App Store, or GitHub reviews exist, so real-world reliability is unverified
- −Per-message pricing plus pass-through carrier fees gets expensive fast for high-volume senders
- −The $699/mo AI bundle is sold separately, undercutting the 'included ACP' marketing message
- −Branded links are still missing, per one Product Hunt user who flagged it as a gap
- • Carrier fees passed through at cost — variable and unpredictable month to month
- • AI features marketed as foundational (ACP) still require the separate $699/mo bundle for full value
- • API access is gated to Professional and above, not available on entry tiers
- • RCS is Enterprise-only, so testing the flagship channel requires a sales conversation
How we verified this
Every listed fact about Postscript — pricing, features, links, status — is re-read from the vendor's own pages by our verification pipeline and each change is logged with a date; the last pass ran on 8 Nov 2026. Analysis is drafted with AI models and checked against our editorial standards before publishing; see how we verify.
Verification history
We have re-verified Postscript 25 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — changed who it suits, summary, our verdict, who should skip it, pricing tiers, features, description, pricing page, limitations
- — changed pricing tiers, who it suits, description, our verdict, summary, features
- — changed use cases, pricing tiers, our verdict, description, who it suits, features, who should skip it, hidden costs, setup time, limitations, pricing fit, switching in, switching out, summary
- — changed summary, our verdict, description, who should skip it, pricing tiers, who it suits, features
- — changed limitations, pricing page, platforms
- — changed summary, switching out, features, who should skip it, setup time, pricing tiers, hidden costs, pricing fit, use cases, limitations, switching in, our verdict, description, who it suits, SSL certificate
Showing the 6 most recent of 25 verification passes.
Free to cite with attribution — this page re-verifies continuously.
How much does Postscript cost in 2026?
Postscript: Free to start; paid plans from $100/mo. Pricing last verified 8 Nov 2026.
Plans compared
Every published Postscript tier, its price as the vendor publishes it, who it fits, and what it adds over the tier below. The 12-month cost projection follows.
| Plan | Price | Billing | Who it's for |
|---|---|---|---|
| Starter | Free | — | Shopify brands just getting started with SMS that will send enough to clear the $49 monthly minimum spendAdds: Free entry point at $0/mo with a $49 monthly minimum spend; $0.009/SMS and $0.045/MMS plus carrier fees, 2 opt-in keywords, and a dedicated toll-free number. |
| Growth | $100/mo | monthly | Brands actively building an SMS program and sending regularly enough to benefit from a lower per-message rateAdds: $100/mo adds unlimited opt-in keywords, a lower rate of $0.008/SMS and $0.03/MMS, and live chat plus email support. |
| Professional | $500/mo | monthly | Brands scaling SMS into a top revenue channel that need API access and white-labeled opt-in captureAdds: $500/mo adds $0.007/SMS and $0.024/MMS, enhanced analytics, priority support, API access, and removal of "Powered by Postscript" from opt-in. |
| Enterprise | Custom | quote | Brands ready to make SMS their number-one revenue channel and needing RCS or a data warehouse feedAdds: Custom pricing adds a dedicated Customer Success Manager, personalized messages with custom product recommendations, Data Warehouse Push, and the option to add RCS. |
| Postscript AI Plan | $699/mo | monthly | Brands with enough subscriber volume to justify agentic 1:1 journeys and high-volume variant testingAdds: $699/mo bundle on top of your marketing plan: Brand Center, Infinity Testing, and Shopper, with per-message rates of $0.003–$0.30 depending on product and message type. |
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Where the pricing makes sense
The company stage and team size where Postscript's pricing actually pencils out — and where peers do it cheaper.
The marketing ladder — $0/mo Starter with a $49 monthly minimum spend, $100/mo Growth, $500/mo Professional — is priced for Shopify brands sending SMS at real volume, where the declining per-message rates ($0.009 → $0.008 → $0.007/SMS) actually pay off. Add the $699/mo Postscript AI Plan and a mid-size brand is committing well over $1,000/mo before messages. Klaviyo bundles email and SMS with AI features at lower entry cost; Attentive competes on managed service. Postscript is the better deal
Has Postscript's pricing changed?
No plan price for Postscript has moved since we began logging in Aug 2026; the pricing page is re-read on every verification pass.
Who should pick Postscript?
Pick Postscript if you are Shopify DTC brands where SMS or RCS is a top revenue channel, Retention teams that want automated, on-brand variant testing at scale, Brands ready to add email on the same profile as SMS and RCS, US and Canada senders who want built-in compliance support and transparent per-message rates.
Look elsewhere if you are Stores on WooCommerce, BigCommerce, or other non-Shopify platforms, Small senders who won't clear the $49 monthly minimum spend plus per-message and carrier fees, Teams that need push notifications alongside SMS, RCS, and email, Buyers who want AI features bundled into the base subscription rather than a $699/mo add-on.
Skip it if Skip Postscript if you run a non-Shopify store, or if your send volume is small enough that a $49 monthly minimum plus a separate $699/mo Postscript AI Plan never pays back.
GeneratedReal-world workflow fit
Concrete scenarios for the personas Postscript actually fits — and what changes day-one when you adopt it.
Connect Shopify, replace the old blast tool with a Visual Flow Builder abandoned-cart automation, and turn on Onsite Opt-in alongside checkout collection to grow the list.
Outcome: One profile per customer across SMS and email, revenue attributed to the cart flow, and list growth running through multiple capture surfaces instead of a single popup.
Move onto the Professional plan for the lower per-message rate and API access, then run Infinity Testing on campaign and automation variants in the weeks before the sale.
Outcome: Hundreds of on-brand variants tested rather than a handful hand-written, with the brand's tone enforced by Brand Center so nothing off-brand ships.
Use Postscript's September 2025 email launch migration tooling to bring the list across, then run email on the same Identity Resolution profile as SMS with four attribution models configured.
Outcome: Email and SMS report on one profile instead of two disconnected dashboards, and carrier-fee lines stay visible so the true send cost is known.
Use cases
- Trigger an SMS abandoned-cart flow minutes after abandonment with Shopify revenue attribution.
- Migrate off another email provider using Postscript's launch migration tooling and run email on the same profile as SMS.
- Run Infinity Testing on hundreds of on-brand SMS variants before Black Friday instead of hand-writing a handful.
- Grow your list with Onsite Opt-in, checkout collection, and post-purchase capture instead of one popup.
- Deploy Shopper journeys so high-value subscribers get 1:1 messages curated from their behavior and past conversations.
- Launch CashBack campaigns as a coupon alternative with built-in A/B testing to protect margin.
- Segment by LTV, product affinity, or engagement for win-back and VIP campaigns.
- Hand the SMS program to Postscript Plus strategists if you don't have in-house SMS bandwidth.
Setup time & first value
How long it actually takes to get something useful out of Postscript — broken out by persona, not the marketing-page minute.
Shopify brands connecting an existing store: under an hour to install the app, sync catalogue and customer data, and switch on the abandoned-cart and welcome templates. Adding Onsite Opt-in and checkout collection is a same-day task. Brands migrating an existing SMS list or moving email across should budget a few days for opt-in compliance review and the email migration itself before the first
Switching to or from Postscript
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Klaviyo: import the list via Postscript's onboarding tooling, then map segments onto Shopify attributes and third-party integration data.
- →From Attentive: port the subscriber list and rebuild campaigns as Visual Flow Builder automations with cart, browse, and welcome templates.
- →From a legacy email provider: use Postscript's September 2025 email launch migration tooling, then run email on the same Identity Resolution profile as SMS.
- ↗To Klaviyo: export subscribers and segment definitions, then rebuild automations in Klaviyo flows; expect email and SMS to sit on separate data models again.
- ↗To Attentive: export the list and rebuild SMS campaigns; managed-service strategy replaces the Postscript AI bundle.
Resources & guides
Tutorials & Learning
YouTube returned 6 videos for “Postscript”, and we withheld 6: 6 could not be judged, because “Postscript” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about Postscript.
Official links
What are the best Postscript alternatives?
The closest alternatives to Postscript we list are Klaviyo, MailerLite email marketing MCP server and GetResponse. Ranked by direct product-type match, not category overlap.
| Alternative | Pricing | Starts at | Last verified |
|---|---|---|---|
| Klaviyo | Freemium | Pricing not published | — |
| MailerLite email marketing MCP server | Freemium | Pricing not published | — |
| GetResponse | Paid | Pricing not published | — |
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Klaviyo
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GetResponse
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Frequently asked questions
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