Postscript Pricing 2026: Plans, SMS Rates and Carrier Fees

Postscript costs $0/mo on Starter in 2026 with a $49 monthly minimum spend, $100/mo on Growth and $500/mo on Professional. Every plan then charges per message, $0.009, $0.008 and $0.007 per SMS respectively, plus carrier fees that Postscript passes through at an average of $0.0033 per US text. A store sending 8,000 texts a month pays about $98 on Starter, our arithmetic, and the plan fee only pays for itself above 100,000 texts a month.

Postscript is an SMS marketing platform built for Shopify stores, with campaigns, automated flows, opt-in tools and a toll-free number on every plan, and it bills by messages sent rather than by subscriber count. That is the opposite of Klaviyo and Omnisend, which price by contacts, so the question for a Postscript buyer is not how big the list is but how often it gets texted and whether the higher plans' features are worth their fixed fee.

Every rate on this page was read on Postscript's pricing page on 26 October 2026, with the billing rules from Postscript's help center the same day. Whether the product beats Attentive and Klaviyo SMS is the Postscript review; this page is the invoice.

Toolradar data: Toolradar, the software directory we run, tracks 25 SMS marketing tools as of 26 October 2026, and 9 of them have a free plan. The median entry paid plan among the 13 that publish one with no stated unit is $39/mo, which puts Postscript's $0 Starter fee below the median and its Growth fee well above it. The category figures are on the SMS marketing statistics page and the ranking is best SMS marketing tools. Dupple sends MarketingShot and its other newsletters on beehiiv, not on Postscript or any email product named here. MarketingShot data: this list has 35,000+ active subscribers as of November 1, 2026, with an open rate of 32%.

At a glance

Carrier fees come on top of every per-message rate and are listed as a separate line on the invoice, with no markup. Postscript prints the US averages next to the plans: $0.0033 per SMS, $0.00799 per MMS, $0.0047 per text RCS and $0.0087 per media RCS, for the 50 US states and Canada only.

How does Postscript pricing work?

Three lines on the bill: a platform fee for the plan, messaging fees per segment sent, and carrier fees. You pay after you send; there are no prepaid balances, expiring credits, overages or automatic upgrades, and the help center's billing article says plans can be moved up or down whenever a store wants. Contracts are optional and come with negotiated rates, but a store can install the Shopify app and be billed monthly without one.

A segment is the unit. An SMS of up to 160 characters is one segment, an emoji drops that to 70 characters per segment, and a longer text is split and billed per segment. An MMS allows 1,600 characters with or without emoji and is billed once, which is why a long promotional message with an image can cost less than the same copy as three SMS segments on the lower plans.

The Starter minimum is the rule that catches small stores. Starter has no platform fee, but after the 30-day trial a $49 monthly minimum applies. If messaging spend comes in under that figure, Postscript charges the difference, and the help center says the rule applies for as long as the account is active, regardless of usage. A store that texts rarely pays that floor either way, so Starter is free in name and the minimum in practice until the list is busy enough to spend that on messages.

What does a month of texting cost on each plan?

Three stores, four campaigns a month, no MMS, carrier fees at the printed US average of $0.0033 per SMS. All figures are our arithmetic on the rates above.

Starter is the cheapest plan at every volume a small or mid-sized store is likely to send, because the per-SMS gap between plans is only a tenth of a cent. Growth's $100 fee is covered only above 100,000 texts a month (100,000 messages times the $0.001 saving), and Professional's extra $400 over Growth needs 400,000 texts before the lower rate pays for it. Carrier fees are the same on every plan, so they never change which plan wins; at 40,000 texts they add $132 to any of the three.

That means the upgrade decision is about features. A store that needs more than two opt-in keywords, live chat support, API access for a custom integration or opt-in forms without the "Powered by Postscript" line is buying Growth or Professional for those things. Price them as a flat monthly fee rather than expect the message rates to earn it back.

Mid-article note for MarketingShot readers: the weekday brief tracks changes to ladders like this one; the signup sits at the end of this page.

What do carrier fees add?

Carrier fees are the surcharges Verizon, AT&T, T-Mobile and the Canadian carriers charge per message, billed by Postscript at cost on their own invoice line. The carrier fee article lists them per carrier. AT&T charges $0.0035 per SMS and $0.009 per MMS, T-Mobile $0.0045 and $0.01 (and $0.0025 for each inbound SMS), and Verizon's SMS fee rose from $0.0045 to $0.005 on 1 October 2026. The rates are the same from a short code or a toll-free number. Canadian carriers run higher per SMS, from $0.0047 on Freedom Mobile to $0.0087 on Bell.

The fee matters more than it looks on Starter, where it adds more than a third on top of the $0.009 rate. On 8,000 texts it is $26.40 of the $98.40 month in the table, and because it is billed by carrier the actual figure depends on which networks your subscribers use. The pricing page's figure is an average, not a quote. International sending is a different line entirely: the international costs article sets SMS outside the US and Canada at $0.25 per message on the three self-serve plans, and MMS is not supported there.

What do the numbers and add-ons cost?

A dedicated toll-free number is included on every plan and verified during setup. A dedicated short code, which the pricing FAQ recommends for high-volume senders who want faster, more consistent delivery, costs $750/mo and is passed through from the carriers without markup, so a store on Professional with a short code is at $1,250/mo before it sends a text.

The Postscript AI Plan is a separate $699/mo bundle of Brand Center, Infinity Testing and Shopper, with per-message rates from $0.003 to $0.30 depending on the product and message type, sold through sales. Postscript Plus, the managed service where Postscript's strategists run the program, and the Fondue CashBack add-on publish no price. Email, launched as a channel on the same platform, is on a waitlist with no printed rate beyond a claim of 20 to 30% below legacy providers.

Is there a free trial?

Yes, in the form of a $100 credit for the first 30 days that covers message and carrier fees, with the two keywords, automations, campaigns, segments and integrations open to test. Run through the credit, or reach day 30, and messages are billed at the Starter rates unless a different plan is chosen; after the trial the Starter minimum starts. An existing compliant list can be uploaded for the trial after a compliance review.

Postscript vs Attentive, Klaviyo and Omnisend on price

The honest comparison is on pricing model, because the rivals do not all print a rate. Attentive publishes no list price; its pricing page says plans are built around messages sent, list size, channels and AI tools, through a demo. Klaviyo sells SMS as prepaid monthly spend on top of its email plan, billed per segment and recipient at a rate that varies by country; check the current price on Klaviyo's site, and see the Klaviyo pricing breakdown for the email side it sits on. Omnisend prints SMS from $0.007 per message in the US, varying by volume, on top of a contact-priced plan, covered in the Omnisend review.

What that means for a buyer: Postscript's rates are public and its platform fee is zero at the entry, so a store can model the month before installing, which the table above does. The trade-off is that nothing is bundled: a store already paying Klaviyo for email gets SMS inside the same contact band, while Postscript is a second invoice. The SMS marketing cost guide prices the channel across vendors, the best SMS marketing software ranking covers tools outside Shopify such as SimpleTexting, reviewed in the SimpleTexting review, and the cheaper Klaviyo alternatives list is for stores pricing the email side too.

Has Postscript's price changed?

The per-message rates have come down and the minimum has gone up. Archived copies of the pricing page from 19 July 2024 and 6 February 2025 show Starter at $0.015 per SMS with a $25 monthly minimum and Growth at $0.01 per SMS. By 15 December 2025 the page printed the current $0.009 and $0.008 rates with the old ones struck through, and the minimum had moved to $30; the 4 August 2026 copy shows today's $49.

Professional's $500 fee and $0.007 rate are unchanged across every copy, and the Growth fee has not moved either. The printed average US carrier fee for SMS was $0.00287 in July 2024 and is a tenth of a cent higher today, a small rise that matches the Verizon change in the help center. Net effect for a Starter store sending 8,000 texts: the message line fell from $120 to $72 a month, while the floor for a quiet month nearly doubled.

Who should pay for Postscript?

A Shopify store that texts a list of a few thousand people several times a month is Postscript's best case on Starter. It pays nothing fixed beyond the Starter floor, gets flows, segments and a toll-free number, and its month is a function of messages sent, which it controls. The same store should stay on Starter until it needs keywords, chat support or the API, since the rates alone never justify Growth below 100,000 texts.

A store that texts fewer than about 5,000 messages a month, or wants SMS inside its email bill, should look elsewhere first. Under that volume the Starter minimum makes Postscript dearer per message than its printed rate suggests, and Klaviyo or Omnisend fold SMS into a plan the store may already pay for. A high-volume brand that wants a short code is budgeting $750/mo on top of any plan.

Methodology and sources

Plan fees, per-SMS and per-MMS rates, the printed average carrier fees, the Starter minimum, the short code price, the AI Plan and the trial credit were read on Postscript's pricing page on 26 October 2026. The minimum-spend rule and the no-overage billing model come from the help center's usage bill article, the per-carrier fees and the 1 October 2026 Verizon change from the carrier fee article, and the $0.25 international rate from the international costs article. The three-store table, the 100,000 and 400,000-text break-evens and the history comparison are our arithmetic on those printed rates. Attentive's pricing basis and Omnisend's SMS rate were read on their pricing pages the same day; Klaviyo's SMS rate is not printed as a flat US figure on its pages. Past prices come from the dated web.archive.org copies linked in the history section and are used only for the "before" comparison. The Toolradar figures are from its SMS marketing category as of 26 October 2026.

Louis Corneloup, founder of Toolradar and Dupple, wrote this page. We run no test lab and give no rating. The method is on how we rate, corrections on the editorial policy and the author note on about. Re-read the pricing page before the trial credit runs out.

FAQ

How much does Postscript cost per month in 2026?

Starter has no platform fee but a $49 monthly minimum spend, Growth is $100/mo and Professional $500/mo. Messages are billed on top at $0.009, $0.008 and $0.007 per SMS respectively, plus carrier fees averaging $0.0033 per US text. A store sending 8,000 texts a month pays about $98 on Starter, our arithmetic, and about $492 at 40,000 texts.

Is Postscript free?

Starter is $0 in platform fee, but it is not free to run: after the 30-day trial a $49 monthly minimum applies, and a store whose messaging spend is lower is charged the difference. The trial itself is a credit that covers message and carrier fees for 30 days.

What are Postscript's carrier fees?

Surcharges the mobile carriers charge per message, which Postscript bills at cost on a separate line. The pricing page prints a US average of $0.0033 per SMS and $0.00799 per MMS; per carrier, AT&T is $0.0035 per SMS, T-Mobile $0.0045 and Verizon $0.005 since 1 October 2026. They are the same on every plan and do not apply outside the US and Canada, where SMS is a flat $0.25.

When is Growth worth it over Starter?

On message rates alone, above 100,000 texts a month: the $0.001 per-SMS saving needs that many messages to cover the Growth fee. Below that volume Growth is a purchase of unlimited opt-in keywords and live chat support, not a cheaper way to send. Professional needs 400,000 texts a month more than Growth to pay for its extra $400.

Does Postscript charge by subscriber count?

No. There are no profile or contact fees; the bill is the plan fee plus messages sent plus carrier fees, so a large list that is texted rarely costs less than a small list texted daily. Klaviyo and Omnisend price the other way, by contacts, which is the main structural difference between them and Postscript.

How much does a short code cost on Postscript?

$750/mo, passed through from the carriers with no markup, on any plan. A toll-free number is included at no charge and is the default for new accounts; the short code is for high-volume senders who want faster and more consistent delivery.

Cite this: MarketingShot, "Postscript Pricing 2026: Plans, SMS Rates and Carrier Fees", October 2026.

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