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SPECIFICTION
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Postscript

postscript.io

From $100/mo Free plan WebAPI
Visit postscript.io
Spec score 7.9 #24 of 50 in SMS Marketing Software

What it is

Postscript is an agentic retention marketing platform for ecommerce brands using SMS, RCS, email, and future channels. Marketing plans include a visual flow builder, automation templates, subscriber acquisition tools, segmentation, analytics, response management, and custom attribution windows. Its Agentic Context Platform stores brand and customer context so AI agents can act at individual subscriber level, and it is included with every plan at no extra cost. The AI Plan adds Brand Center controls for message tone and knowledge, Infinity Testing for message variants, and Shopper for personalized journeys. Integrations cover ecommerce, email, support, loyalty, reviews, analytics, and workflow automation. Professional includes API access, with documentation for the API, JavaScript SDK, and webhooks. The listed Starter plan is free with a $49 monthly minimum spend; other named plans run from $100 to $699 monthly, while Enterprise pricing is custom. A trial provides $100 credit for 30 days.

Spec sheet

Product
Postscript describes itself as an agentic retention marketing platform across SMS, RCS, email, and future channels.Read 9 Oct 2026 · postscript.io
Audience
Postscript says it helps ecommerce brands design and operate SMS programs that engage customers and drive revenue.Read 9 Oct 2026 · postscript.io
Trial
Postscript says a free trial includes $100 in credit usable during the first 30 days, after which or when exhausted additional messages are charged at the Free package rate unless another package is selected.Read 9 Oct 2026 · postscript.io
Integrations
Postscript's integration directory groups connections into categories including ecommerce platforms, email, customer support, loyalty, reviews, analytics, and workflow automation.Read 9 Oct 2026 · postscript.io
Support
Customer Experience Advocates provide live chat Monday–Friday from 6am PT to 5pm PT and email support; Professional and Enterprise plans include dedicated onboarding and priority support.Read 9 Oct 2026 · postscript.io
AI context
Its Agentic Context Platform stores brand and customer context so AI agents can act at the individual subscriber level, and the homepage says it is included with every plan at no extra cost.Read 9 Oct 2026 · postscript.io
AI products
The Postscript AI Plan includes Brand Center controls for message tone and brand knowledge, Infinity Testing for message variants, and Shopper for personalized journeys.Read 9 Oct 2026 · postscript.io
Messaging tools
All marketing plans include a visual flow builder with automation templates, subscriber acquisition tools, segmentation, analytics, response management, and custom attribution windows.Read 9 Oct 2026 · postscript.io
Platform API
Professional pricing lists API access for custom integrations, and Postscript provides developer documentation for its API, JavaScript SDK, and webhooks.Read 9 Oct 2026 · postscript.io
Pricing limits
The listed messaging rates apply to the United States 50 states and Canada, with carrier fees added; a dedicated short code is listed at $750/month through carriers.Read 9 Oct 2026 · postscript.io
Security and compliance
Postscript says its features and list-growth tools are built to follow TCPA, mobile carrier, and other regulatory guidelines.Read 9 Oct 2026 · postscript.io
Subscriber privacy
Postscript's help documentation says shops can submit subscriber deletion and access requests, with API-based requests available on Professional and Enterprise plans.Read 9 Oct 2026 · help.postscript.io

Plans and prices

Starter Free $0/mo.; $49 monthly minimum spend; $0.009/SMS, $0.045/MMS + Carrier fees* Campaigns and automations · Unlimited segments · Dedicated toll-free number · 2 opt-in Keywords Read 9 Oct 2026 · postscript.io
Growth $100 a month $100/mo.; $0.008/SMS, $0.03/MMS + Carrier fees* Starter features · Unlimited opt-in Keywords · Live chat and email support Read 9 Oct 2026 · postscript.io
Professional $500 a month $500/mo.; $0.007/SMS, $0.024/MMS + Carrier fees* Growth features · Enhanced Analytics · Priority live chat/email support · API access for custom integrations Read 9 Oct 2026 · postscript.io
Postscript AI Plan $699 a month $699/mo.; Per Message Rates: $0.003 – $0.30 (depending on the product and message type) Brand Center · Infinity Testing · Shopper Read 9 Oct 2026 · postscript.io
Enterprise Priced on request Contact us for custom pricing Professional features · Dedicated Customer Success Manager · Data Warehouse Push · Option to add RCS Read 9 Oct 2026 · postscript.io

Every Postscript plan and price →

Strong points and limits

Strong points

  • Visual flow builder and automation templates included
  • Segments audiences and manages responses
  • AI context platform included with every plan
  • Professional plan includes API access
  • 30-day trial includes $100 credit

Limits

  • Starter has a $49 monthly minimum spend
  • Carrier fees are added to messaging rates
  • Dedicated short code costs $750/month

Who it suits

Postscript is aimed at ecommerce brands operating retention programs across messaging channels. Professional and Enterprise plans suit teams needing API integrations, onboarding, priority support, or subscriber privacy requests.

Verdict

Postscript covers campaign automation, subscriber growth, analytics, AI tools, and integrations for ecommerce messaging. Review minimum spend, carrier fees, and plan-specific capabilities before selecting a tier.

Where Specifiction places it

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