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Surveys · head to head

Formstack vs Postscript

Formstack logo

Formstack

Surveys

Form builder with document generation and e-signature

From
On request
Free plan
No
Full reviewWebsite
Postscript logo

Postscript

Marketing

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

From
$49/month
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: Formstack more expensive than form builders that only collect, which is the fair comparison for simple use; 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: Formstack covers Form builder, Postscript covers Shopify segmentation.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Formstack and Postscript actually diverge.

Attributes where Formstack and Postscript differ
AttributeFormstackPostscript
Starting priceOn request$49/month
Pricing modelTiered monthly subscription published on the vendor site; HIPAA-capable plans priced separatelyPer month plus per message sent
PlatformsWeb, CloudWeb, iOS
CategorySurveysMarketing

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

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 Formstack

  • Form builder
  • Document generation
  • E-signature
  • Workflow routing
  • Salesforce integration
  • Compliance features

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.

Formstack

  • Processes where a submitted form must become a signed documentnot Postscript
  • Regulated intake needing HIPAA-capable handlingnot Postscript
  • Salesforce shops wanting forms and documents inside the CRMnot Postscript

Postscript

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

Where each one falls short

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

Formstack

  • More expensive than form builders that only collect, which is the fair comparison for simple use
  • Document generation and signature sit in higher tiers, so the headline price is not the working price
  • The interface has accumulated features over a long life and shows it
  • Overkill where a form only needs to collect an answer

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

Formstack

On request

No published plan breakdown. See the Formstack 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 Formstack if

  • You need form builder.
  • You work on Web, Cloud.
  • You also want document generation.
Formstack review

Choose Postscript if

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

Questions people ask

Is Formstack or Postscript better?
Neither clearly leads. Formstack 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, Formstack or Postscript?
Formstack starts at On request and Postscript at $49/month.
Does Formstack or Postscript run on more platforms?
Formstack runs on Web, Cloud. Postscript runs on Web, iOS.
What is Formstack best used for?
Formstack is most often used for processes where a submitted form must become a signed document, regulated intake needing hipaa-capable handling, salesforce shops wanting forms and documents inside the crm. Of those, processes where a submitted form must become a signed document and regulated intake needing hipaa-capable handling are not what Postscript is typically brought in for.
What can Formstack do that Postscript cannot?
Formstack covers Form builder, Document generation, E-signature, Workflow routing. Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

Answered from the vendors’ own pages

Formstack: What does Formstack cost?

It publishes tiered monthly pricing; document generation and e-signature sit in higher tiers, and HIPAA-capable plans are priced separately.

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.

Formstack: What makes it different from a plain form builder?

It generates documents from submissions and collects signatures on them, which is the step that otherwise involves retyping form data into a template.

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.

Formstack: Is it HIPAA compliant?

It offers HIPAA-capable plans for regulated data. That is a plan-level feature, not the default.

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.

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