Is Iterable or Postscript better?

Neither clearly leads. Iterable starts at On request and Postscript at $49/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Iterable or Postscript?

Iterable starts at On request and Postscript at $49/month.

Does Iterable or Postscript run on more platforms?

Iterable runs on Web. Postscript runs on Web, iOS.

What is Iterable best used for?

Iterable is most often used for personalizing customer journeys across all channels, optimizing retention through lifecycle messaging, driving upsells with intelligent segmentation, adapting campaigns based on real-time behavior. Of those, personalizing customer journeys across all channels and optimizing retention through lifecycle messaging are not what Postscript is typically brought in for.

What can Iterable do that Postscript cannot?

Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

Marketing · head to head

Iterable vs Postscript

Iterable

Marketing

The AI customer engagement platform global brands trust to create experiences that drive growth…

From: On request
Rated: -

Full review Website

Postscript

Marketing

SMS marketing built for Shopify merchants, with carrier fees billed on top of message rates

From: $49/month
Rated: -

Full review Website

The short version

Each has a real cost: Iterable no pricing information published on their site - contact sales required; Postscript carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Iterable and Postscript actually diverge.

Attributes where Iterable and Postscript differ
Attribute	Iterable	Postscript
Starting price	On request	$49/month
Pricing model	quote	Per month plus per message sent
Platforms	Web	Web, iOS

Identical on both: free tier (No), user rating (Not yet rated), category (Marketing).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Iterable

Nothing recorded that Postscript does not also cover.

Only in Postscript

Shopify segmentation
Automated flows
Subscriber acquisition
Two-way conversations
MMS campaigns
Revenue attribution
Headless SDK
Usage-based tiers

What people use each for

The jobs each tool is most often brought in to do.

Iterable

Personalizing customer journeys across all channelsnot Postscript
Optimizing retention through lifecycle messagingnot Postscript
Driving upsells with intelligent segmentationnot Postscript
Adapting campaigns based on real-time behaviornot Postscript

Postscript

A Shopify direct-to-consumer brand that wants abandoned cart recovery by text rather than another email in an ignored inboxnot Iterable
A brand running a product drop where a timed broadcast to an opted-in list is the whole launch mechanismnot Iterable
A merchant segmenting by past purchase and variant to send replenishment reminders at the right intervalnot Iterable
A store on headless Shopify or a custom stack that still wants SMS built on order data through the SDKnot Iterable

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Iterable

no pricing information published on their site - contact sales required

Postscript

Carrier pass-through fees are billed on top of the per-message rate, roughly $0.00418 per SMS and $0.00841 per MMS in the United States, and are routinely missing from the cost comparisons buyers build.
The cheapest per-message rates require the $500 a month plan, so a small sender pays more than double the headline low rate per text.
The $0 Starter plan carries a $49 minimum monthly spend, so it is not a free tier and quiet months still generate a bill.
US SMS marketing carries real legal exposure under consent, quiet hours and carrier registration rules, and the compliance obligation sits with the merchant, not the platform.
It is SMS and MMS only, so email, push and on-site messaging live in a separate tool and audience suppression between the two has to be managed across systems.

Pricing, plan by plan

Iterable

On request

No published plan breakdown. See the Iterable review.

Postscript

$49/month

Starter$49/month
- $0 base fee but a $49 minimum monthly spend
- SMS at $0.015 and MMS at $0.045 per message
- Campaigns, automations, acquisition tools and analytics
Growth$100/month
- Lower per-message rates than Starter
- Full campaign and automation feature set
- No contract required
Professional$500/month
- Rates falling towards $0.007 SMS and $0.024 MMS
- Suited to high-volume senders
- Upgrade or downgrade at any time
Enterprise$undefined/month
- Custom pricing on a contract
- Negotiated message rates and support terms

Which should you pick?

Choose Iterable if

Nothing in the data separates Iterable from Postscript on the points above - pick on price and on how each one feels to use.

Iterable review

Choose Postscript if

You need shopify segmentation.
You work on Web, iOS.
You also want automated flows.

Postscript review

Questions people ask

Is Iterable or Postscript better?: Neither clearly leads. Iterable starts at On request and Postscript at $49/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Iterable or Postscript?: Iterable starts at On request and Postscript at $49/month.
Does Iterable or Postscript run on more platforms?: Iterable runs on Web. Postscript runs on Web, iOS.
What is Iterable best used for?: Iterable is most often used for personalizing customer journeys across all channels, optimizing retention through lifecycle messaging, driving upsells with intelligent segmentation, adapting campaigns based on real-time behavior. Of those, personalizing customer journeys across all channels and optimizing retention through lifecycle messaging are not what Postscript is typically brought in for.
What can Iterable do that Postscript cannot?: Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

Answered from the vendors’ own pages

Iterable: How much does Iterable cost?

Iterable does not publish pricing on their website. Interested customers must contact their sales team, book a demo, or request a quote through their website for pricing information.

Source

Postscript: Is Postscript only for Shopify?

It is built for Shopify and that is where its segmentation advantage lies, but headless and non-Shopify stores are supported through an SDK with more setup work.

Postscript: What is the real cost per text?

The plan rate plus carrier fees. On Starter that is about $0.015 plus roughly $0.00418 in US carrier fees per SMS, so budget close to two cents a message before discounts.

Postscript: Is the Starter plan free?

No. The base fee is $0 but there is a $49 minimum monthly spend, so it functions as a $49 floor.

Postscript: Do I need a contract?

No. Contracts are offered but not required, and plans can be moved up or down at any time under usage-based billing.

Iterable vs Postscript

Iterable

Postscript

The short version

Where they differ

What each one covers

Only in Iterable

Only in Postscript

What people use each for

Iterable

Postscript

Where each one falls short

Iterable

Postscript

Pricing, plan by plan

Iterable

Postscript

Which should you pick?

Choose Iterable if

Choose Postscript if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Iterable

More on Postscript

Keep looking

Other head to heads