Postscript review

Postscript is a retention marketing platform for brands, centered on SMS but also covering RCS, email and AI-powered customer journeys. Its tools include subscriber list building, message creation and sending, onsite opt-in, and branded-profile RCS messages. The company also describes customer and brand context for AI agents, compliance support and services for managing SMS programs.

Pricing is where the headline needs context. The Starter plan has no monthly platform fee, but the pricing page lists a $49 monthly minimum spend and per-message charges. Growth starts at $100 per month, so that is the lowest listed paid plan. Pricing is monthly, with no contract required; annual pricing is not published. The pricing details list a 30-day free trial. In short, Postscript is aimed at brands that want more than a basic text-sending tool, but costs depend on both the plan and message volume.

Postscript covers several retention channels in one product: SMS, RCS and email, alongside shopper journeys and onsite subscriber opt-in. That range may suit a brand looking to coordinate customer messaging rather than assemble separate tools. The company describes its journeys as AI-powered and one-to-one, and its email product as built on an AI-native foundation.

There are also meaningful differences between plan tiers. Starter includes two opt-in Keywords, unlimited segments and a dedicated toll-free number. Growth adds unlimited opt-in Keywords and live chat and email support. Professional adds enhanced analytics, priority support and API access for custom integrations; it also removes “Powered by Postscript” from opt-in. For brands that need to test messaging, the $699-per-month Postscript AI Plan includes Brand Center, Infinity Testing and Shopper. Enterprise customers can get custom pricing, a dedicated Customer Success Manager and Data Warehouse Push, with an option to add RCS. That gives buyers a clearer path from basic SMS toward a broader retention setup, provided the added cost fits.

The free Starter plan is not free to use in practice: Postscript lists a $49 monthly minimum spend, plus $0.009 per SMS and $0.045 per MMS, before carrier fees. Growth costs $100 monthly; Professional is $500. Their message rates fall by tier, but they still add up: Professional lists $0.007 per SMS and $0.024 per MMS, also plus carrier fees. Carrier fees are listed separately at $0.00330 per SMS and $0.00799 per MMS.

The AI bundle is a substantial jump. Postscript AI costs $699 per month, with additional per-message rates ranging from $0.003 to $0.30 depending on product and message type. Enterprise pricing is custom, and prices for Postscript Plus and Fondue/CashBack are not published, so total costs may be harder to compare in advance. A dedicated short code adds $750 per month, charged by carriers. Annual pricing is not published either. These fees make it worth estimating message volume and add-ons before treating the listed plan price as the full cost.

Postscript’s pricing page lists a free Starter plan, but “free” still comes with a $49 monthly minimum spend, plus $0.009 per SMS, $0.045 per MMS and carrier fees. Growth is $100/month, with lower message rates—$0.008 per SMS and $0.03 per MMS—but the jump from Starter buys unlimited opt-in Keywords and live chat and email support. Professional costs $500/month and lowers rates again; it adds Enhanced Analytics, priority support and API access. Enterprise pricing is custom.

The separate Postscript AI Plan is $699/month, with per-message rates from $0.003 to $0.30 depending on product and message type. That plan includes Brand Center, Infinity Testing and Shopper. A dedicated short code adds $750/month, charged by carriers. Carrier fees also pass through at cost, including $0.00330 per SMS and $0.00799 per MMS. Pricing is monthly, with no contract; annual pricing isn’t published. A 30-day free trial is listed. Confirm your expected volume and applicable fees before comparing the headline plan prices.

The published pricing and product information does not spell out migration services, data-export formats, or how to transfer subscriber history and consent records. Treat those as open questions, not assumed features. Before moving to Postscript, ask what data it can import from your current SMS or email platform, whether opt-in timestamps and suppression lists are preserved, and what your team must rebuild in journeys, segments and integrations.

The pricing page says monthly billing is available without a contract, which limits one kind of commitment; it does not publish cancellation steps or data-retention terms. Ask how to export your data before signing, and confirm the process for moving your sending number if you later leave. We don’t have Reddit posts or comments in the published sources, so we can’t responsibly say what users report as reasons for leaving. For either direction, get migration scope, ownership of subscriber data, and any fees in writing before changing systems.