Postscript Pricing in 2026: Plans, Fees, and What You Really Pay

Postscript pricing has two layers: a monthly platform fee ($0 on Starter, $100 on Growth, $500 on Professional, custom on Enterprise) and per-message rates from $0.007 to $0.009 per SMS plus carrier fees. Your real cost is driven by sends, not the plan fee, so the budget question is a volume question.

All figures below were read from Postscript's own pricing page in October 2026. SMS pricing changes often, so treat the vendor page as the final word on the day you sign.

The four plans, exactly as published

Postscript sells four SMS and RCS plans. Starter is $0 per month with a $49 monthly minimum spend, at $0.009 per SMS and $0.045 per MMS. Growth is $100 per month at $0.008 per SMS and $0.03 per MMS. Professional, which Postscript flags as its most popular plan, is $500 per month at $0.007 per SMS and $0.024 per MMS. Enterprise is quote-only with custom message rates and an RCS add-on option. Every per-message rate carries "+ carrier fees," which is where many brands misread their first invoice, so the next section covers it before anything else. Postscript also sells an AI plan at $699 per month with per-message rates from $0.003 to $0.30 depending on message type, bundling its Brand Center, Infinity Testing, and Shopper products. All plans start with a 30-day free trial per the pricing page.

Carrier fees: the line item nobody budgets

Carriers charge a pass-through fee on every message sent to their networks, and every SMS platform passes it on. Postscript publishes average US carrier fees of $0.0033 per SMS and $0.00799 per MMS, with text RCS at $0.0047 and media RCS at $0.0087, applying to the US and Canada. On Professional, that makes a real SMS cost roughly $0.0103 and a real MMS cost roughly $0.032. The practical rule: add about a third to your SMS budget math and about a quarter to MMS math before comparing platforms, and apply the same correction to every competitor quote, because carrier fees are universal even when a sales deck leaves them out.

What a brand actually pays at three list sizes

Plan fees are the small number; sends are the big one. Model a brand sending four campaigns a month to its engaged segment plus automation volume at roughly 30 percent of campaign volume. A 5,000-subscriber list sending 20,000 SMS a month on Starter pays about $246 in messages and carrier fees with no platform fee. A 25,000-subscriber list sending 100,000 SMS on Growth pays $100 plus roughly $1,130, so about $1,230 a month. An 80,000-subscriber list sending 320,000 SMS on Professional pays $500 plus roughly $3,296, so about $3,800 a month. Two lessons fall out of the math. First, the jump from Growth to Professional pays for itself at scale: the $0.001 per-SMS saving covers the extra $400 platform fee at 400,000 sends a month. Second, list hygiene is a pricing feature: every text to a dead subscriber costs full price, which is why segmentation discipline is the cheapest upgrade in SMS.

What you get for the money (and what the fee does not buy)

Postscript is Shopify-native: list growth tools, segmentation built on store data, cart and browse automations, campaign tooling, and compliance handling, with its Onsite Opt-in product driving collection. What no plan fee buys is program quality. Postscript's own 2026 benchmarks across 17,000+ Shopify stores put abandoned-cart texts at a 9.53 to 17.28 percent click-through rate, earning $3.52 to $10.95 per message, and the spread between those bands is operator skill, not platform tier. Our own programs sit in the upper band: on Darc Sport, campaigns earned $7.89 per message sent and SMS revenue grew 29.8 percent in two months, on the same platform pricing anyone can buy. The platform is the instrument; the per-message economics come from how it is played.

Compliance is included, and it is worth more than it looks

SMS carries legal exposure that email does not: TCPA consent requirements, quiet hours, opt-out handling, and carrier registration all sit on every send. Postscript handles the infrastructure layer on all plans: consent capture records, automatic opt-out processing, quiet-hours controls, and the carrier-side registration work that keeps messages delivering. That matters to the pricing conversation for two reasons. First, it is a real part of what the platform fee buys, and a reason the do-it-cheaper route through a generic SMS API is usually a false economy for a store. Second, the platform can only enforce mechanics, not judgment: whether your list grew on genuine consent, whether your send frequency respects the channel, and whether your quiet-hours settings match where your customers actually live are operator decisions. The expensive compliance failures in SMS are almost always program failures, not platform failures, and no tier of any vendor's pricing page covers them.

The AI plan: who the $699 tier is actually for

Postscript's AI plan at $699 per month with per-message rates from $0.003 to $0.30 bundles Brand Center, Infinity Testing, and Shopper. The honest read: this tier is for brands where SMS is already a top-two revenue channel and the constraint is testing velocity, not infrastructure. The wide per-message range reflects product mix across message types, so model it on your actual mix before comparing it to Professional. A brand still building its list, its flows, or its segmentation discipline will get more revenue from fixing those on a $100 plan than from AI tooling on a $699 one. Buy testing acceleration after there is a program worth accelerating.

Switching to or from Postscript: the migration math

Platform moves in SMS are cheaper than in email because the asset is simpler: a consented subscriber list, keyword opt-ins, and a handful of flows. The costs that do exist are re-verification of consent records (do this properly; it is your legal trail), rebuilding automations, and a short performance dip while the new number or sender identity warms. Budget two to four weeks of parallel attention and avoid migrating inside the October-to-December window, when the dip costs peak revenue. If the move is motivated by price alone, run the per-message math first: at most volumes the platforms are closer than their sales decks suggest, and program quality moves results far more than a $0.001 rate difference.

Postscript vs the alternatives, priced honestly

Against Attentive, the structural difference is pricing model: Attentive sells custom quotes tied to volume commitments, while Postscript publishes usage rates, which usually favors Postscript below roughly 100,000 subscribers and makes true comparison possible only on a per-message, all-in basis. Our full breakdowns are in the Attentive pricing guide and the Attentive vs Postscript comparison. Against Klaviyo SMS, the pull is consolidation: one platform for email and SMS, with per-message dollar rates since July 2026. The honest rule: platform choice moves SMS results less than list quality and automation coverage do, so pick on integration depth and your stack, then spend the saved attention on the program. Our ranked read of the field is in the best SMS marketing agencies list for the agency side of that decision.

Reading your first invoice without surprises

Expect three line groups: the platform fee, message charges split by SMS and MMS, and carrier fees as their own line. Check the MMS share first, because at four to five times the SMS rate plus the higher carrier fee, image-heavy sending quietly doubles a bill; many brands discover most of their campaigns defaulted to MMS. Then check sends against your segment sizes, because the gap between them is the suppression and hygiene opportunity described below.

How to cut your Postscript bill without cutting revenue

Four levers work on any plan. Send campaigns to engaged segments instead of the full list: cutting 30 percent of sends that never convert cuts the invoice by the same share. Let automations carry more weight: triggered messages out-earn campaigns per send, so shifting volume toward flows raises revenue per dollar. Use SMS where immediacy pays and email where it does not: a doors-open text earns its cost; a newsletter-as-text does not. And prune quarterly: subscribers who have not clicked in six months cost full price to message and return almost nothing. These are the mechanics an SMS marketing agency is paid to run; the pricing page is public, but the margin lives in the operating discipline.

FAQ

Does Postscript have a free plan? Starter has a $0 monthly platform fee but is not free to use: it carries a $49 monthly minimum spend and the highest per-message rates ($0.009 SMS, $0.045 MMS). It is the right entry point for testing whether SMS earns a place in your stack.

Which Postscript plan should a growing Shopify brand pick? Price the crossover, not the feature list: Growth beats Starter once lower message rates cover the $100 fee (around 100,000 SMS a month), and Professional beats Growth around 400,000 sends a month. Run your actual send volume through the per-message math before upgrading.