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ConvertKit vs Postscript

ConvertKit logo

ConvertKit

News

The creator platform for digital professionals

From
Free
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

  • Only ConvertKit has a free tier, so it costs nothing to try first.
  • Each has a real cost: ConvertKit the free Newsletter plan allows only one basic visual automation, so sequences beyond a single flow require paying; 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: ConvertKit covers Email marketing, Postscript covers Shopify segmentation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which ConvertKit and Postscript actually diverge.

Attributes where ConvertKit and Postscript differ
AttributeConvertKitPostscript
Starting priceFree$49/month
Pricing modelfreemiumPer month plus per message sent
Free tierYesNo
PlatformsWebWeb, iOS
CategoryNewsMarketing
Founded2013Unknown

Identical on both: 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 ConvertKit

  • Email marketing
  • Landing pages
  • Subscriber tagging
  • Automation workflows
  • Digital product sales
  • Broadcast emails
  • Subscriber segments
  • Email templates

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.

ConvertKit

  • Sending newsletters and email sequences to an audiencenot Postscript
  • Selling paid subscriptions and digital products to a mailing listnot Postscript

Postscript

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

Where each one falls short

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

ConvertKit

  • The free Newsletter plan allows only one basic visual automation, so sequences beyond a single flow require paying
  • The free plan is a single user, and the Creator plan at $33 a month allows two
  • Subscriber signals, engagement analytics and paid recommendations are Pro only, at $66 a month
  • A/B testing is capped at 2 subject lines below Pro, which allows 5
  • Paid pricing is banded by subscriber count, so the published figures apply only at the smallest band

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

ConvertKit

Free
  • FreeFree
    • Up to 10,000 subscribers
    • Unlimited landing pages and forms
    • Unlimited email broadcasts
  • Creator$33/month
    • Up to 1,000 subscribers
    • Unlimited visual automations
    • Email sequences
  • Pro$66/month
    • Up to 1,000 subscribers
    • Everything in Creator plan
    • Subscriber engagement scoring

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 ConvertKit if

  • You need email marketing.
  • You want to start without paying.
  • You also want landing pages.
ConvertKit review

Choose Postscript if

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

Questions people ask

Is ConvertKit or Postscript better?
Neither clearly leads. ConvertKit starts at Free and Postscript at $49/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ConvertKit or Postscript?
ConvertKit has a free tier; the other does not. Paid plans start at Free for ConvertKit and $49/month for Postscript.
Does ConvertKit or Postscript run on more platforms?
ConvertKit runs on Web. Postscript runs on Web, iOS.
Can I use ConvertKit for free?
Yes. ConvertKit has a free tier, so you can try it without paying. Postscript starts at $49/month.
What is ConvertKit best used for?
ConvertKit is most often used for sending newsletters and email sequences to an audience, selling paid subscriptions and digital products to a mailing list. Of those, sending newsletters and email sequences to an audience and selling paid subscriptions and digital products to a mailing list are not what Postscript is typically brought in for.
What can ConvertKit do that Postscript cannot?
ConvertKit covers Email marketing, Landing pages, Subscriber tagging, Automation workflows. Postscript covers Shopify segmentation, Automated flows, Subscriber acquisition, Two-way conversations.

Answered from the vendors’ own pages

ConvertKit: How much does ConvertKit cost?

ConvertKit offers a free tier and two paid plans: Creator at $33/month (annual $390/year saving $78) and Pro at $66/month (annual $790/year saving $158). All plans include unlimited landing pages, email broadcasts, and audience management features.

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.

ConvertKit: What does the free ConvertKit plan include?

The free plan supports up to 10,000 subscribers with unlimited landing pages, forms, email broadcasts, audience tagging, and digital product sales. No credit card required to start.

Source
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.

ConvertKit: What are the subscriber limits on ConvertKit plans?

The free plan supports up to 10,000 subscribers. Both Creator and Pro paid tiers support up to 1,000 subscribers. This creates a subscriber limit decrease when upgrading from free to paid plans.

Source
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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