Softwr

Marketing · head to head

Insider vs Postscript

Insider logo

Insider

Marketing

Omnichannel personalisation platform with web experimentation and WhatsApp as first-class channels

From
On request
Rated
-
Full reviewWebsite
Postscript logo

Postscript

Marketing

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

From
$49/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Insider delivery depends heavily on the assigned account team, so results vary by region and a team change mid-contract can be felt immediately in campaign output.; 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.
  • They diverge on capability: Insider covers Architect journeys, Postscript covers Shopify segmentation.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Insider and Postscript actually diverge.

Attributes where Insider and Postscript differ
AttributeInsiderPostscript
Starting priceOn request$49/month
Pricing modelquotePer month plus per message sent
PlatformsWeb, iOS, Android, REST APIWeb, 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 Insider

  • Architect journeys
  • Web and app personalisation
  • WhatsApp commerce
  • Predictive segments
  • InStory and InMobile
  • Experimentation

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.

Insider

  • A retailer in a WhatsApp-first market that needs conversational commerce rather than more email volumenot Postscript
  • Personalising category and product pages by segment without waiting for engineering release cyclesnot Postscript
  • A marketing team without in-house campaign operations that needs the vendor to build and run journeysnot Postscript
  • Unifying web, app and messaging targeting on one profile store after outgrowing separate point toolsnot Postscript

Postscript

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

Where each one falls short

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

Insider

  • Delivery depends heavily on the assigned account team, so results vary by region and a team change mid-contract can be felt immediately in campaign output.
  • The suite is licensed by module, so the platform fee quoted at the start typically excludes the channels and predictive features that make the business case work.
  • Template-driven web personalisation targets the rendered DOM, which breaks on single-page applications that re-render after the template applies unless a developer wires in the framework hooks.
  • Reporting exports are limited compared with warehouse-native tools, so teams that want campaign data alongside finance data end up pulling it through the API on a schedule.
  • Contracts are annual and negotiated per traffic band, so a seasonal spike in visitors can push you into a renegotiation rather than a metered overage.

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

Insider

On request
  • Insider Growth Management Platform$undefined/year
    • Licensed by module and by monthly traffic or user volume
    • Channels such as WhatsApp, SMS and email priced separately
    • Annual contract with an assigned delivery team

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 Insider if

  • You need architect journeys.
  • You work on Web, iOS, Android, REST API.
  • You also want web and app personalisation.
Insider review

Choose Postscript if

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

Questions people ask

Is Insider or Postscript better?
Neither clearly leads. Insider 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, Insider or Postscript?
Insider starts at On request and Postscript at $49/month.
Does Insider or Postscript run on more platforms?
Insider runs on Web, iOS, Android, REST API. Postscript runs on Web, iOS.
What is Insider best used for?
Insider is most often used for a retailer in a whatsapp-first market that needs conversational commerce rather than more email volume, personalising category and product pages by segment without waiting for engineering release cycles, a marketing team without in-house campaign operations that needs the vendor to build and run journeys, unifying web, app and messaging targeting on one profile store after outgrowing separate point tools. Of those, a retailer in a whatsapp-first market that needs conversational commerce rather than more email volume and personalising category and product pages by segment without waiting for engineering release cycles are not what Postscript is typically brought in for.
What can Insider do that Postscript cannot?
Insider covers Architect journeys, Web and app personalisation, WhatsApp commerce, Predictive segments. Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

Answered from the vendors’ own pages

Insider: Is WhatsApp actually usable at scale here?

Yes. It is a supported primary channel with catalogue and template message support, though WhatsApp conversation fees from Meta are passed through and are separate from the licence.

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.

Insider: Can we run it without vendor help?

You can, but the pricing assumes a managed relationship. Teams with strong in-house campaign operations often find they are paying for services they do not use.

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.

Insider: Does it work for B2B?

Rarely a good fit. The segmentation, recommendations and channel mix are built around high-frequency consumer behaviour.

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.

Share

Related pages

More on Insider

More on Postscript

Keep looking

Other head to heads