Postscript
Postscript is an SMS-first marketing and conversational commerce platform purpose-built for Shopify ecommerce brands. It serves 20,000+ DTC merchants with AI-driven list growth, two-way messaging, Shopper AI assistant, and optional managed services, backed by Twilio infrastructure and EIA-led TCPA advocacy.
- Company typePrivate
- Founded2018
- HeadquartersScottsdale, United States
- Headcount251–500
- GTM typeB2B
- OfferingSoftware
What Postscript does
Postscript is an SMS-first marketing and conversational commerce platform purpose-built for Shopify-based direct-to-consumer ecommerce brands. Founded in 2018 and headquartered in Scottsdale, Arizona, the company serves 20,000+ Shopify merchants with a stack that includes a visual Flow Builder (65+ event triggers and 45+ behavioral filters), a proprietary Onsite Opt-in Network spanning 130M+ recognized subscribers, and the Postscript AI suite (Brand Center, Infinity Testing, Shopper AI Shopping Assistant, and Conversation Insights). The platform runs on Twilio infrastructure under a preferred-partner relationship that provides 3x more sending bandwidth and 90% lower latency, supporting 97.6% (TFN) and 99.9% (DSC) U.S./Canada deliverability and 100% uptime during BFCM 2024. Compliance is hard-wired into the product via TCPA guardrails (Quiet Hours, opt-out traps), an in-house legal team, a TCPA Defense Force partnership, and Postscript's co-founding role in the Ecommerce Innovation Alliance (EIA), which filed a Quiet Hours petition with the FCC accepted for public comment in 2025.
The company monetizes through tiered SaaS subscriptions (Starter freemium with $49 monthly minimum, Growth at $100/mo, Professional at $500/mo, and custom Enterprise) layered with usage-based per-message fees ($0.007–$0.015/SMS, $0.024–$0.045/MMS) plus pass-through carrier fees. Additional revenue streams include Postscript Plus managed services (Launch, Essentials, and Signature tiers with dedicated SMS strategists), the Postscript AI add-on bundle, Fondue CashBack (a performance-based coupon alternative via the getfondue.com sub-brand), and partner referral commissions at 10% for 12 months via PartnerStack. Go-to-market is multi-motion: product-led growth via the Shopify App Store (1,900+ five-star reviews) with a 30-day $100-credit free trial, inside sales for mid-market via Book-a-Demo CTAs, and a higher-touch field-sales/managed-service motion through Postscript Plus for enterprise brands. Shopify's April 2026 developer-ecosystem profile described Postscript as a $100 million SMS marketing company; the firm is venture-backed across four rounds totaling approximately $106M, including a $65M Series C closed in June 2022 led by 01 Advisors with participation from Greylock, OpenView, and Twilio.
Postscript firmographics
Firmographics- Name
- Postscript
- Legal name
- Postscript
- Website
- https://postscript.io
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Postscript is an SMS-first marketing and conversational commerce platform purpose-built for Shopify ecommerce brands. It serves 20,000+ DTC merchants with AI-driven list growth, two-way messaging, Shopper AI assistant, and optional managed services, backed by Twilio infrastructure and EIA-led TCPA advocacy.
- Ownership category
- akta.pro rank
Postscript industry classification
Industry- Product category
- SMS Marketing Software
- NAICS
- Advertising, Public Relations, and Related Services (5418)
- SIC
- Services-Advertising (7310)
- akta.pro primary industry
- Social Commerce & Livestream Shopping Platforms (BPAMAGAJ)
Keywords
Where Postscript is headquartered
LocationHeadquarters
- HQ city
- Scottsdale
- HQ country
- United States
- HQ region
- North America
Markets served
Postscript business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Marketing or Sales, Personnel, Infrastructure, Operations, Supply Chain
Revenue model
- SaaS Subscription Plans: Tiered monthly subscriptions: Starter ($0/mo + $49 minimum), Growth ($100/mo), Professional ($500/mo, Most Popular), and Enterprise (custom). Plans bundle core platform features and include a per-month minimum spend on messaging.
- Usage-Based Messaging Fees: Per-message charges on top of subscription tiers: SMS ($0.009–$0.015) and MMS ($0.024–$0.045) plus pass-through US carrier fees (~$0.00418 SMS, ~$0.00841 MMS). Pricing scales down at higher tiers.
- Postscript Plus Managed Services: Premium managed-service add-on providing dedicated SMS strategists and full-service SMS program management across Launch, Essentials, and Signature tiers.
- Partner Referral Commissions: Affiliate/referral revenue through the PartnerStack-powered partner program, paying 10% commission per month for the first 12 months on referred brand accounts.
- Postscript AI Add-on Bundle: AI tier bundling Brand Center, Infinity Testing, Shopper, and Conversation Insights as a paid add-on to the core SMS Marketing subscription.
- Fondue CashBack Add-on: Performance-based CashBack coupon alternative (via subsidiary getfondue.com) where merchants pay out only when incentives are redeemed.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Starter: $0/mo with $49 monthly minimum spend; for brands just getting started with SMS |
| Subscription | Monthly | Growth: $100/mo; for brands building their SMS program |
| Subscription | Monthly | Professional: $500/mo (Most Popular); for brands scaling SMS as a top revenue channel |
| Other | Multi-year contract | Enterprise: Contact Sales; custom pricing for brands making SMS their #1 revenue channel |
| Usage-based | Pay-as-you-go | Usage-based messaging fees layered on every plan + optional Postscript AI and Plus add-ons |
Go-to-market motion6 records
Distribution channels7 records
Marketing channels11 records
Postscript product offering
Product offeringCore offering
Postscript is an SMS-first marketing and conversational commerce platform purpose-built for Shopify ecommerce brands. It combines subscriber list growth (popups, Onsite Opt-in, keywords, checkout collection, QR codes), segmentation, AI-driven campaign and automation tools, two-way conversational messaging, and a managed-service layer. Layered on top are Postscript AI (Brand Center, Infinity Testing, Shopper, Conversation Insights), Postscript Plus managed services, Postscript RCS rich messaging, and the Fondue CashBack coupon sub-brand.
Product overview
Postscript operates a focused, SMS-first platform-plus-modules architecture built specifically for Shopify ecommerce brands. The core product is Postscript SMS Marketing, providing list growth, segmentation, campaigns, automations, two-way messaging, and analytics. Layered on top are several modules: Postscript Plus (managed services with in-house strategists across Launch/Essentials/Signature tiers), the Postscript AI suite (comprising Brand Center, Infinity Testing, Shopper, and Conversation Insights), Postscript RCS (rich messaging), the Onsite Opt-in list growth suite, and Fondue CashBack (coupon alternative sub-brand). Supporting infrastructure includes a developer-facing API/SDK, a proprietary Subscriber LTV analytics framework, and a Compliance & Deliverability suite backed by Twilio infrastructure. The portfolio is tightly integrated, with Postscript Plus and Postscript AI directly extending the SMS Marketing core.
Differentiator
Problem solved
Functional benefit
Brands
- Postscript Plus: Managed SMS marketing service combining Postscript's AI-powered messaging platform with in-house strategists to maximize revenue from SMS.
- Postscript AI
- Shopper
- Fondue
Products and services
- Postscript SMS Marketing Flagship SMS marketing platform purpose-built for Shopify ecommerce brands. Enables subscriber list growth (popups, Onsite Opt-in, checkout collection, keywords, QR codes), segmentation, campaign sends, automated and behavioral SMS flows, two-way conversational messaging, and analytics. Reported to drive a 34x average ROI on SMS spend.
- Postscript Plus Premium managed SMS marketing service combining Postscript's SMS platform with dedicated in-house strategists. Available in Launch, Essentials, and Signature tiers, providing list growth strategy, automation audits, and conversational Shopper support for brands making SMS their primary revenue channel.
- Postscript AI Suite of revenue-driving AI features for marketers sold as a paid add-on to the SMS Marketing core. Bundles Brand Center (brand voice training), Infinity Testing (AI multivariate SMS copy optimization), Shopper (AI shopping assistant), and Conversation Insights (NLP-driven conversation analytics).
- Shopper Always-on AI shopping assistant for SMS that engages every subscriber in 1:1 personalized conversations, answers product questions, makes recommendations, and drives sales in the brand's voice. Responds within one minute and is positioned to scale conversational shopping without expanding headcount.
- Postscript RCS Rich Communication Services (RCS) messaging offering enabling brands to send rich messages from a branded profile for higher engagement and conversion versus standard SMS.
- Fondue CashBack Smart CashBack coupon alternative offered as a popup conversion driver and incentive for SMS list growth and offer optimization. Operated as a sub-brand at getfondue.com and reported to increase Welcome Series revenue by 37% when integrated.
- Postscript API & SDK Developer-facing API and SDK enabling custom integrations, Data Warehouse Pushes, and deployment of Postscript popups, opt-in checkbox, and TCPA-compliant language on non-Shopify and headless ecommerce stores. Available on the Professional plan and above.
Quantifiable outcome
- 34x Return on Investment on SMS Spend (average across Postscript brands)
- +14 more outcomes
Companies that use Postscript
Customer profileNamed customers41 records
Segments10 records
Ideal customer profiles2 records
Postscript technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration18 records
AI capability10 records
Feature9 records
Postscript partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and flagship.
- TiecorePostscript and Tie launched an integration enabling ecommerce brands to trigger 41% more SMS abandonment automations by matching anonymous website visitors to opted-in SMS subscribers using Tie's identity graph; solves cookie-blocking and cross-device tracking issues. Beta customers saw a 44% lift in SMS send volume on browse abandonment automations; Portland Leather Goods cited a 16% increase in abandonment revenue.
- ShopifyflagshipPostscript is a Shopify Plus Certified partner with deep integration into the Shopify ecosystem; one of the most successful apps in Shopify's $1.3B+ developer ecosystem, profiled by Shopify as a $100M SMS marketing company serving 20,000+ Shopify brands. Product features (Onsite Opt-in, Checkout collection, Short codes) are purpose-built around Shopify Plus.
- TwilioflagshipPostscript holds a preferred-partner relationship with Twilio, providing 3x more sending bandwidth and 90% less sending latency; enables 100% uptime during BFCM 2024. Joint engineering powers real-time visibility into carrier queues to proactively address deliverability issues.
- Ecommerce Innovation Alliance (EIA)corePostscript co-founded the EIA and offers free sponsored EIA memberships to all customers. The EIA filed a petition with the FCC to stop frivolous Quiet Hours lawsuits (accepted for public comment in 2025). Provides expert guidance and regulatory alerts to members.
- TCPA Defense ForcecorePartnership that gives Postscript customers access to a network of TCPA litigators with pre-negotiated discounted rates; helps Postscript track industry regulations, proactively notify customers, and answer compliance questions.
- GorgiascoreDirect integration with Gorgias helpdesk; appears on Postscript's partners page and integrations list, enabling brands to connect SMS responses to their support workflows.
- ZendeskcoreFeatured integration enabling brands to route SMS responses into Zendesk for unified customer support.
- KlaviyocoreListed integration allowing data sharing and cross-channel orchestration between Postscript SMS and Klaviyo email; commonly co-deployed by ecommerce brands.
- ReChargecoreFeatured integration supporting subscription-management SMS automations and trigger events for ReCharge-powered subscriptions.
- PartnerStackcorePartnerStack powers Postscript's Partner Program — handling applications, referral links, and 10% commission payouts for the first 12 months on referred brand accounts.
Scale indicators15 records
Recent moves6 records
Expansion highlights7 records
Postscript competitors and assessment
Company assessmentBroad incumbents
- Braze: Braze is an enterprise customer engagement platform with SMS, email, push, and in-app messaging. It overlaps with Postscript's Enterprise tier and Postscript Plus for large DTC and retail brands running lifecycle messaging across channels.
- HubSpot: HubSpot is a broad CRM and marketing-automation suite with SMS Marketing Hub. It competes indirectly by offering SMB ecommerce brands a single vendor for email, CRM, and SMS — putting pricing pressure on Postscript's Starter and Growth tiers.
- ActiveCampaign: ActiveCampaign is an SMB/mid-market email-first automation platform with native SMS. It is a comparable alternative for smaller Shopify brands that prefer an integrated email+SMS suite over a standalone SMS specialist.
- Iterable: Iterable is a cross-channel marketing platform with SMS, email, and push for mid-market and enterprise ecommerce and consumer brands. It overlaps with Postscript at the upper end of the market where brands run orchestrated multi-channel campaigns.
- Klaviyo: Klaviyo is the email-first incumbent for Shopify ecommerce and has built a strong native SMS offering that bundles email + SMS + reviews. It competes head-to-head with Postscript in mid-market and enterprise Shopify and represents the dominant all-in-one threat.
Others
- Twilio: Twilio is Postscript's underlying messaging infrastructure provider and preferred partner, supplying 3x more sending bandwidth and 90% lower latency. As a key technology partner (and a Series C investor), Twilio is comparable as the SMS backbone Postscript builds on rather than a direct competitor.
- Shopify: Shopify is Postscript's primary distribution channel and ecosystem partner (Shopify Plus Certified). It is comparable as the platform host — and potential competitive threat — for ecommerce SMS marketing rather than as a peer product.
Direct peers
- Attentive: Attentive is an SMS-first marketing platform serving many of the same DTC/Shopify brands (e.g., Steve Madden, Urban Outfitters). It is the closest direct competitor with comparable AI-driven personalization, two-way messaging, and Shopify Plus integration.
- Sendlane: Sendlane is a smaller ecommerce-focused marketing platform with email, SMS, and behavior-based automation. It directly competes with Postscript for Shopify brands in the SMB-to-mid-market segment and shares the SMS + email positioning.
Emerging players
- Tidio: Tidio is an SMB-focused conversational platform combining live chat, chatbots, and SMS for Shopify merchants. It overlaps with Postscript at the small/SMB end, particularly where conversational support and lightweight SMS are bundled together.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat7 records
Key risks6 records
Key highlights7 records
Customer concentration
Postscript social profiles
Digital presencePostscript compliance and trust
Trust signalCompliance6 records
Postscript financial estimates
Financial estimateRevenue estimate
Valuation estimate
Postscript leadership team
Management profileNumber of profiles
Profiles3 records
Postscript subsidiaries and ownership
Company hierarchySubsidiaries1 record
Postscript funding detail
Funding detailFunding overview
Funding rounds4 records
Investors18 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Postscript M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Postscript
What does Postscript do?
Postscript is an SMS-first marketing and conversational commerce platform purpose-built for Shopify ecommerce brands. It combines subscriber list growth (popups, Onsite Opt-in, keywords, checkout collection, QR codes), segmentation, AI-driven campaign and automation tools, two-way conversational messaging, and a managed-service layer. Layered on top are Postscript AI (Brand Center, Infinity Testing, Shopper, Conversation Insights), Postscript Plus managed services, Postscript RCS rich messaging, and the Fondue CashBack coupon sub-brand.
Is Postscript a public or private company?
Postscript is a private company. It is classified as venture growth investor backed and is currently operating.
When was Postscript founded?
Postscript was founded in 2018. It employs 251 to 500 people.
Where is Postscript based?
Postscript is headquartered in Scottsdale, United States, in the North America region.
How does Postscript make money?
Six revenue lines are on record. SaaS Subscription Plans are the primary driver. The others are usage-Based Messaging Fees, postscript Plus Managed Services, partner Referral Commissions, postscript AI Add-on Bundle and fondue CashBack Add-on.
Who are Postscript's main competitors?
Broad incumbents on record are Braze, HubSpot, ActiveCampaign, Iterable and Klaviyo. Others are Twilio and Shopify. Direct peers are Attentive and Sendlane. Tidio is listed as an emerging player.
Does Postscript have an API?
Yes. Postscript provides a developer-facing API documented at developers.postscript.io for custom integrations and advanced capabilities. API access is included with the Professional plan and above, enabling Enterprise customers to perform Data Warehouse Pushes and send personalized messages with custom product recommendations. A software development kit (SDK) is also available for merchants on non-Shopify/headless stores, including desktop and mobile popups, an opt-in checkbox for checkout, and TCPA-compliant language. The platform is built on Twilio infrastructure for SMS throughput. Developer documentation is at developers.postscript.io/docs.
What industry is Postscript in?
Postscript's product category is SMS Marketing Software. Its primary akta.pro industry code is BPAMAGAJ, Social Commerce & Livestream Shopping Platforms. Its NAICS code is 5418 and its SIC code is 7310.