The most profitable SMS programs are built here
For eight years, we focused on building the best SMS product on the market. Now, on an AI-native foundation, it's only getting better.
Why 20,000+ brands choose Postscript SMS
The foundation
Don’t just store your customer data, put it to work. The Agentic Context Platform (ACP) holds all of your brand and customer context, allowing AI agents to read from it and act on it at the individual subscriber level. Every message sent and subscriber action across every channel makes the whole platform smarter.
Shipping at AI speed
For years, we've been first to market with the biggest innovations in SMS. We invented Onsite Opt-in (patented, US 12,101,314) so brands could grow their lists without sending shoppers off-site. We invented Infinity Testing so brands could stop guessing which message wins. And we brought AI sales conversations to SMS while others still didn’t believe in conversational marketing. Now, as an AI-native platform, we build faster than ever before.
Strategy built on what works
You don’t need to be a celebrity brand to get treated like one. Our team is dedicated to giving you the guidance and strategy you need to make more money from your retention marketing program, no matter how small or large your brand is.
Dedicated CSM support: Get expert guidance from someone who knows your goals, your brand, and how to scale your retention program with confidence.
Postscript Plus: Work with SMS strategists who help you plan, launch, and optimize every part of your program.
"There are so many great things about Postscript, but the strategy and support is probably the number one thing I love. It's not comparable to any other vendor we work with."
Joanne Coffey
Senior Retention Marketing Manager
Lower cost of ownership
Lower rates and no profile fees: The most competitive SMS rates and zero profile fees—we don’t punish you for growing your list.
No hidden costs: Pay after you send. No prepaid balances, expiring credits, overages, or auto-upgrades. Carrier fees pass through at cost on their own line - so you know what you are paying for.
The data layer is included: The Agentic Context Platform comes with every plan. You pay to message your customers, not to store your data.
Every message earns more: Better strategy and the highest-performing products on the market put more revenue behind every send.
We have your back
We are the compliance and regulatory leaders in the space, going above and beyond built-in guardrails. In 2023, we founded the Ecommerce Innovation Alliance, a nonprofit advocacy group. They educate lawmakers, defend brands from harmful legislation, and publish resources to help ecommerce businesses like yours stay compliant and ahead of legal changes. Every Postscript customer gets a free EIA membership worth up to $50,000 annually.
Results to text home about
Powering agentic 1:1 marketing across every channel
Agentic 1:1 marketing only works if the agent actually knows the person it's talking to. That's what our data foundation is built for: every detail a customer shares, wherever they share it- a form, conversation, or a past purchase- becomes part of the same Unified Profile.
Customer Signals
A signal can be structured data - like what a subscriber views, purchases, or shares through an onsite form or popup. It can also be unstructured: anything they share about their shopping preferences in conversations.
Everything you need to send your next best message
Build flows with ease
Build automation and campaign flows in minutes with our drag-and-drop Flow Builder. Powerful enough for your most complex journeys.
Attribution, four ways
See your revenue across four attribution models side by side: last touch, linear, position-based, and time decay. You're never stuck with one way of counting.
FAQs
We maintain strategic partnerships with multiple top-tier aggregators to give merchants optimal speed to market, deliverability, reliability, and throughput. Our deep integrations give us real-time visibility into carrier queues, allowing us to proactively identify carrier delays and help you navigate them with as little impact as possible. Over BFCM 2025, we maintained 100% uptime and delivered 99% of messages successfully. Learn more ›
They're the three number types you can send from in the US, and the tradeoffs are throughput, cost, and branding. Short codes (5–6 digits) offer the highest throughput and are built for high-volume marketing. Toll-free numbers are lower cost with solid throughput. 10DLC uses a standard 10-digit local number, which feels personal but comes with tighter volume limits. Postscript helps you pick and register the right one for your list size and sending strategy.
All three. SMS is text, MMS adds images and GIFs, and RCS turns the thread into an app-like shopping experience: your verified brand profile, rich cards, swipeable carousels, and tappable buttons, with automatic fallback for devices that don't support it. Typical shops earn 18% more revenue per message on RCS than SMS. Learn more about RCS here ›
Faster than you'd think. Our patented Onsite Opt-in tools capture subscribers with a one-time passcode without ever sending shoppers off-site, the Opt-in Network recognizes known visitors across 130M+ subscribers to make subscribing one tap, and Opt-in Reminder re-engages shoppers who close the popup. Brands have seen 6x year-over-year list growth since we introduced Onsite Opt-in.
Easier than you think. Our team has handled thousands of migrations end to end, setting you up for success from the start:
Program build or replication. We recreate your existing setup — or build something better: popups and list-growth tools, customer journeys, transactional messaging, templates and content blocks.
List transfer support. Your subscribers and your segmentation come with you, intact.
Compliance review. A TCPA defense review plus best-practice recommendations, so you switch platforms without inheriting risk.
Carrier registration and go-live readiness. Number verification and website, Terms of Service, and Privacy Policy setup to get you approved to send.
Number transfers. Dedicated short code and toll-free number transfers, or new number requests if you're starting fresh.
Launch strategy. A new-number launch campaign and initial messaging plan, so day one on Postscript is a revenue day, not a rebuild day.
Integrations and technical support. We connect your stack and solve the technical edge cases with you.
Team training and enablement. Your team learns the platform before you start sending.