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Postscript

Postscript is an SMS and RCS marketing platform for e-commerce brands, with Shopify-focused integrations, automations, AI sales agents, and usage-based per-message pricing.

Freemium · Web, API

What is Postscript?

Postscript is an SMS and RCS marketing tool that enables e-commerce brands to manage customer messaging, retention marketing, and list growth. The platform includes automations, AI sales agents, and Infinity Testing for optimizing messages. It is built around Shopify and also lists integrations with BigCommerce, WooCommerce, and Zapier.

Key Features of Postscript

Postscript combines SMS and RCS marketing functions with e-commerce integrations and messaging tools. Its listed capabilities include:

  • SMS and RCS marketing for e-commerce brands
  • Automations for customer messaging and retention strategies
  • AI sales agents for customer engagement
  • Infinity Testing for message optimization
  • Unified multichannel support
  • Built-in compliance capabilities
  • Revenue-driving messaging strategies
  • List growth through SMS
  • Developer API documented at https://developers.postscript.io/docs/getting-started

Who Should Use Postscript?

Postscript is aimed at e-commerce brands seeking to manage messaging, retention, and engagement through SMS, RCS, and AI-driven marketing features.

  • E-commerce brands using Shopify for customer messaging and retention marketing
  • Merchants using BigCommerce or WooCommerce who want to connect those stores to messaging workflows
  • E-commerce teams seeking to grow an SMS subscriber list
  • Brands using automations or AI sales agents for customer engagement
  • Teams seeking to test and optimize marketing messages with Infinity Testing

How to Use Postscript

E-commerce teams can start by evaluating Postscript's plans and connecting a supported store or integration. Developers can use the API documentation to configure API access, subject to a limit of 15 requests per second per API key.

  1. Review Postscript's plan options and contact the company for Basic Plan details.
  2. Connect a store using Shopify, BigCommerce, or WooCommerce, or use Zapier where appropriate.
  3. Configure messaging and automations for the brand's retention and engagement use cases.
  4. Set up SMS list-growth and customer messaging activities.
  5. Use Infinity Testing to optimize messages.
  6. For programmatic access, consult https://developers.postscript.io/docs/getting-started and observe the 15-requests-per-second API limit.

Postscript Pricing & Plans

The supplied pricing information describes Postscript as freemium and says messaging uses usage-based per-message pricing. The Basic Plan is listed as requiring contact with Postscript; no fixed plan price, per-message rate, or free-tier allowance is specified in the available information.

  • Free tier: included in the freemium listing; allowance and limits are not specified.
  • Basic Plan: Contact Postscript for pricing.
  • Messaging: Usage-based per-message pricing; specific rates are not provided.

Pros

  • Supports both SMS and RCS marketing for e-commerce brands
  • Names integrations with Shopify, BigCommerce, WooCommerce, and Zapier
  • Includes automations, AI sales agents, and Infinity Testing
  • Provides a developer API with published documentation and a stated 15 requests-per-second-per-key limit
  • Uses per-message pricing rather than relying only on a fixed platform subscription

Cons

  • The Basic Plan requires contacting Postscript for pricing
  • No specific per-message rates or free-tier allowances are provided in the available pricing details
  • The API rate limit is 15 requests per second per API key
  • HIPAA alignment is not supported
  • SOC 2 status is listed as in progress

Postscript vs Competitors

The supplied comparisons characterize Postscript as focused on conversational messaging and e-commerce SMS, while alternatives distinguish themselves through broader channel suites, opt-in methods, retention products, or bundled pricing. Pricing and feature availability may vary by plan.

Postscript

Freemium · Web, API

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