Postscript

Postscript is a retention marketing platform for ecommerce brands that want to run customer messaging across SMS, RCS, email, and future channels. It is best suited to teams that need acquisition, automation, segmentation, and analytics together. Its broad workflow tools are a strong fit, though the plan minimums and per-message and carrier charges need to fit the budget.

Overview

Postscript brings campaigns and automated flows together with subscriber acquisition, segmentation, analytics, response management, and custom attribution windows. Its Agentic Context Platform stores brand and customer context for AI agents, and is included with every plan at no extra cost. That gives ecommerce teams a shared foundation for subscriber-level personalization across supported channels.

The integration directory spans ecommerce platforms, email, customer support, loyalty, reviews, analytics, and workflow automation. Postscript offers web and API platforms, with developer documentation for its API, JavaScript SDK, and webhooks. API access for custom integrations is included in Professional and Enterprise pricing, making those plans the relevant options for teams that need it.

Key features

Marketing workflows

All marketing plans include a visual flow builder, automation templates, subscriber acquisition tools, unlimited segments, analytics, response management, and custom attribution windows. This is a substantial baseline for brands building a coordinated messaging program; Starter already includes campaigns and automations, so the higher tiers are mainly for lower message rates, added support, analytics, or API access.

AI products

The separate Postscript AI Plan adds Brand Center controls for message tone and brand knowledge, Infinity Testing for message variants, and Shopper for personalized journeys. At $699/mo., it is a considerable additional commitment for teams that specifically want these AI products; the context platform itself is already included across plans.

Compliance and privacy

Postscript says its features and list-growth tools are built to follow TCPA, mobile carrier, and other regulatory guidelines. Shops can submit subscriber deletion and access requests; API-based requests are available on Professional and Enterprise. Those options matter for teams handling privacy requests at scale, while API-based processing requires a higher-tier plan.

Support

Customer Experience Advocates offer live chat Monday–Friday from 6am PT to 5pm PT, along with email support. Professional and Enterprise add dedicated onboarding and priority support, which can suit teams that want more assistance managing a larger program.

Pricing

Starter is $0/mo. with a $49 monthly minimum spend and rates of $0.009/SMS and $0.045/MMS, plus carrier fees. It includes campaigns and automations, unlimited segments, a dedicated toll-free number, and two opt-in Keywords. This is the entry point for smaller programs, but the monthly minimum and usage charges mean it is not a no-cost plan in practice.

Growth is $100/mo. with rates of $0.008/SMS and $0.03/MMS, plus carrier fees. It adds unlimited opt-in Keywords and live chat and email support to Starter. It fits brands with growing acquisition needs, though its support is not the priority support offered at higher tiers.

Professional is $500/mo. and lowers rates to $0.007/SMS and $0.024/MMS, plus carrier fees. It adds enhanced analytics, priority live chat and email support, and API access for custom integrations. The higher fixed fee makes sense for brands that will use those additions or benefit from the lower per-message rates.

The Postscript AI Plan costs $699/mo. and charges per-message rates from $0.003 to $0.30, depending on product and message type. Its Brand Center, Infinity Testing, and Shopper products distinguish it from the marketing plans. Enterprise has custom pricing and includes Professional features, a dedicated Customer Success Manager, Data Warehouse Push, and the option to add RCS.

Postscript offers a 30-day free trial with $100 in credit. After 30 days or once the credit is used, additional messages are charged at the Free package rate unless another package is selected. 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. Buyers should account for these usage and carrier costs alongside plan fees.

Platforms

Postscript is available on web and through its API. Its messaging rates are published for the United States 50 states and Canada, so teams operating elsewhere should confirm that the pricing fits their markets before choosing a plan.

Who it's for

Postscript is best for ecommerce brands that want to build SMS programs with acquisition, automated customer journeys, segmentation, and response management in one platform, and that may expand into RCS or email. Starter offers the core marketing toolkit, while larger teams can pay for lower messaging rates, enhanced analytics, API access, or dedicated support. It is less suitable for buyers seeking predictable costs from a simple per-message plan, since minimum spend, plan fees, message rates, and carrier fees all affect the bill.

Pros and cons

• Broad marketing toolkit across plans: The visual flow builder, automations, acquisition tools, unlimited segments, analytics, and response management give Starter users more than campaign sending alone.
• AI context included with every plan: Brand and customer context is part of the platform at no extra cost, even though the separate AI products require a $699/mo. plan.
• Higher tiers serve specific needs: Professional adds enhanced analytics and API access, while Enterprise offers data warehouse push and an optional RCS addition.
• Costs stack up: Starter has a $49 monthly minimum spend despite its $0/mo. plan fee, and carrier fees are added to message rates.
• Some useful capabilities have a high threshold: Custom integration API access and API-based privacy requests are reserved for Professional and Enterprise.

Alternatives

Textmagic may suit teams that need messaging across Android, iOS, web, and API, with prepaid usage and rates that vary by destination country; its Essential plan specifies 160 plain-text characters per SMS part.

Attentive is another paid option for teams seeking AI tools for message and subject-line generation and automated retargeting included with all plans; its AI Journeys plan has custom pricing.

Remelo is a more relevant fit for appointment-based businesses: its free Newbie plan includes 25 appointments, reminders and confirmations, one staff member, and an online booking page.

Bird Verify focuses on verification, with verification included and charges applying to channel messages sent.

Kenect is another paid option for teams looking for software across Android, iOS, and web.

Textedly may suit buyers comparing fixed monthly message allowances: its Basic plan is $29 a month for 500 messages monthly, or 600 messages with annual billing, which includes 20% more messages per month.

Pulse SMS is another paid option available on Android, iOS, and web.

SMSGlobal API may fit teams seeking pay-as-you-go API messaging; its listed rate is A$0.03 per message, with rates dropping as single-transaction volume grows.

For broader comparisons, see Business Text Messaging Software, SMS Marketing Software, and Messenger Marketing Software.

Verdict

Choose Postscript if you run an ecommerce brand and want customer acquisition, automated messaging, segmentation, and analytics in a platform built for retention. Its strongest case is the depth of the shared marketing toolkit and the option to scale into API access, enhanced analytics, and AI products. Look elsewhere if you need a simpler cost structure or cannot justify the minimum spend, fixed plan fees, and message and carrier charges.