| 💻 Free Trial: | Yes |
| 🏢 Head Office | 3370 North Hayden Road, Suite 123-251, Scottsdale, AZ 85251, USA |
| 📅 Founded | Not published |
| ⭐ Trustpilot Score: | No reviews yet (September 2026) |
| ↔ Two Way SMS: | Yes |
| 💰 Price Guarantee: | Not published |
| 📊 SMS Reporting: | Yes |
Postscript is an SMS marketing platform built for Shopify and Shopify Plus ecommerce merchants. Its per-message rate starts at $0.009 on the Starter plan, with carrier fees of $0.00418 per SMS billed separately. The platform offers a 30-day free trial with a $100 credit toward message fees. Pricing captured September 9, 2026.
Postscript pricing
Postscript publishes per-message pricing by plan tier: $0.009 per SMS on Starter, $0.008 on Growth, and $0.007 on Professional. Carrier fees are not included in these rates; Postscript states an average US carrier fee of $0.00418 per SMS, which pushes the real all-in Starter cost to roughly $0.0132 per message.
| Plan | Monthly Fee | Per-SMS Rate | MMS Rate |
|---|---|---|---|
| Starter | $0 (with $49 monthly minimum spend) | $0.009 | $0.045 |
| Growth | $100 | $0.008 | $0.03 |
| Professional | $500 | $0.007 | $0.024 |
| Enterprise | Contact us | Not published | Not published |
Rates captured September 9, 2026 from Postscript’s pricing page. International messages outside the US and Canada bill at a flat $0.25 per SMS on all plans.
Postscript pricing page, captured through a US proxy, September 9, 2026.
Postscript features
Postscript’s feature set centers on two-way SMS for ecommerce:
| Feature | Availability |
|---|---|
| Two-way messaging | Yes, via the Responses tab |
| MMS | Yes, US and Canada only |
| Toll-free numbers | Included free on every plan, with verification managed by Postscript |
| Short codes | Yes, at $750 per month carrier pass-through |
| US 10DLC | Not published |
| Email-to-SMS | Not published |
| SMPP | Not published |
The platform includes scheduled sending, templates, reporting, and a JavaScript SDK for headless or non-Shopify storefronts. API access is documented inconsistently: the pricing page lists API access on the $500 Professional plan, but developer documentation states custom API access has been Enterprise-only since April 2022. The public API reference lists six endpoints and no send-message endpoint.
Postscript reliability and compliance
Postscript does not publish a contractual uptime SLA; its Terms of Service disclaim all warranties. The customer-service page claims “over 99.99% uptime” as a marketing statement, and the public status page shows 100% uptime over the trailing 60 days as of September 9, 2026. The named upstream messaging partner is Twilio, and Postscript claims Twilio-preferred status.
On compliance, Postscript includes built-in TCPA tooling: automated double opt-in, a Quiet Hours strategy, and in-thread age verification for restricted categories. Toll-free verification is managed free on the merchant’s behalf, taking roughly 3 to 10 business days. Short codes require a compliance audit and take approximately 4 to 7 weeks. Postscript does not publish SOC 2 or ISO 27001 certification, and its Terms of Service expressly bar processing protected health information under HIPAA.
Postscript support
Live chat support runs Monday to Friday from 6:00 AM to 5:00 PM Pacific (9:00 AM to 8:00 PM Eastern). Email support is available at [email protected], with a separate [email protected] address for API questions. No US support phone number is published on any checked page. Live chat and email support are withheld from the Starter plan, which gets Help Center access only. Professional and Enterprise customers receive a dedicated Onboarding Specialist and Customer Success Manager. Documentation includes a searchable help center and a developer documentation site.
Postscript alternatives
Klaviyo bundles SMS with email marketing and customer data in one platform, useful for brands wanting unified messaging rather than Postscript’s SMS-only, Shopify-first product.
Attentive is an ecommerce SMS and MMS marketing platform built for large-volume DTC brands, with two-way conversational messaging as a named capability and an enterprise-scale positioning.
EZ Texting is a general-purpose SMS marketing platform not tied to Shopify, suited to retail, nonprofit, and service businesses outside ecommerce.
Postscript verdict
Pros
- Publishes full per-message pricing by plan, from $0.009 down to $0.007, without requiring a quote
- Toll-free number and verification included free on every plan
- Short codes passed through at $750 per month with no markup
- Built-in TCPA compliance tooling, including automated double opt-in and Quiet Hours
- 30-day free trial carries a $100 credit toward message and carrier fees
Cons
- No published US 10DLC or long-code option; only toll-free and short codes
- Carrier fees add roughly $0.00418 per SMS on top of every headline rate, pushing real Starter cost about 47% above the advertised $0.009
- Live chat and email support withheld from the Starter plan, and no US support phone number
- No SOC 2 or ISO 27001 certification published
- API access contradictorily documented between the pricing page and developer docs
Postscript suits Shopify and Shopify Plus merchants who want transparent, plan-tiered per-message SMS pricing and can start on the $0 Starter plan with a $49 monthly minimum spend. It does not suit non-ecommerce businesses needing gateway-level SMPP or email-to-SMS integration, high-volume senders needing US 10DLC or long-code numbers, healthcare businesses processing PHI, or buyers needing 24/7 or phone support.
Frequently asked questions
Does Postscript charge a monthly platform fee?
Yes. Starter is $0 per month with a $49 monthly spend minimum, Growth is $100 per month, and Professional is $500 per month.
Are carrier fees included in Postscript’s advertised per-message rate?
No. Carrier fees bill separately at an average of $0.00418 per SMS, on top of the plan’s per-message rate.
Can you use Postscript without Shopify?
Partially. Postscript is built around Shopify but publishes a JavaScript SDK for headless or non-Shopify shops.
Does Postscript support HIPAA-covered health data?
No. Its Terms of Service expressly forbid processing protected health information on the platform.
Does Postscript publish an uptime SLA?
No. It claims “over 99.99% uptime” as marketing copy, and its Terms of Service disclaim all warranties.