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Postscript

The Loophole Whisperer

I already won the fight you didn't know you were in.

postscript.io

The verdict

Postscript wins trust by winning legal fights for merchants, but ROI math needs real scrutiny.

the laid-back friend who's surprisingly good at texting

Postscript is the chill one in the group who never overdoes it but somehow always sends the perfect text at the perfect time. No caps-lock hype, no forty follow-ups, just effortlessly good timing that makes everyone else's texting look desperate. Low-key smooth operator energy.

Tale of the Tape

Postscript vs The Field

Record
4-8wins - losses
Weight class
Email & SMS
Signature move
The Compliance Clinch

Combat Ratings

scientifically made up
Hand-to-Hand
81
Magic
63
Weapon Mastery
91
Footwork
63
Bravery
97
Aura
89

The scouting report

What real users say about Postscriptacross Reddit, X & LinkedIn.

Where it wins

Postscript's biggest differentiator isn't a feature — it's a fight. The company took on Texas's SB140 SMS law and won, carving out its customers from onerous registration and disclosure requirements. That kind of regulatory muscle earns real loyalty, and brands see it as Postscript "standing on business" while competitors told merchants to register and pay up. On the product side, the Onsite Opt-in Engage launch (one-time passcodes to keep brand numbers eligible for Known Sender inbox placement) shows the team building around deliverability, not just messaging volume.

Where it frustrates

The numbers aren't always as clean as they look. One teardown of a $1.6M/year brand found SMS revenue barely covering ad spend once messages-sent and subscriber counts were factored in — a reminder that raw "attributed revenue" can be misleading. Attribution windows are also a sore point: Postscript's default 7-day clicked attribution skews comparisons against platforms like Klaviyo, which use a 1-day standard. Anyone benchmarking channels needs to normalize this before trusting the dashboard.

The bottom line

Postscript is treated as a category leader for SMS-first ecommerce brands, especially those already leaning into Shopify and layering email via Klaviyo. Its growth past $100M in revenue and its willingness to litigate on merchants' behalf give it a credibility edge over rivals like Attentive. But brands should push past top-line "SMS attributed revenue" claims and verify performance with apples-to-apples attribution before scaling spend.</summary_md> <parameter name="reddit_md">## What the community says about Postscript Merchants and consultants generally rank Postscript as a top-tier SMS platform, especially praising its legal wins that shield brands from new compliance burdens. The main skepticism centers on attribution — people flag that Postscript's longer attribution window can inflate perceived ROI compared to other tools, and some teardown threads question whether SMS spend is truly paying off at scale.

What fans love

What Postscript brings into the ring.

  • Won a legal fight exempting customers from Texas's strict new SMS law
  • Onsite Opt-in Engage keeps brand numbers eligible for Known Sender inbox placement
  • Merchants report SMS outpacing email revenue in real campaigns
  • Hosts a Customer Advisory Board that brings top merchants into product roadmap talks

Where it takes damage

The complaints Postscript users bring up most.

  • Default 7-day attribution window inflates results vs industry-standard 1-day windows
  • Some SMS programs show thin margins once messages-sent volume is factored in

What people talk about

The recurring themes in Postscript chatter, most-discussed first.

Competitive Positioning & Comparison

13 mentions

Postscript's legal battles with Attentive and regulatory wins dominate comparison chatter, generally framed as a win for Postscript's credibility.

I have major news to share. But I wanted to let this play out in court before I spoke about it here. Over 2.5 years ago @attentiveHQ sued @PostscriptIO for patent infringement over their “two tap” technology. And in the years since, they’ve spent millions of dollars on lawfare, preferring to push a weak infringement case vs competing in the market with innovation. Well a few weeks ago, a US District Court in Delaware ruled against Attentive, concluding that “[a]ll of Attentive’s claims of patent infringement (of any type) have now been resolved in Postscript’s favor” and threw out all of Attentive’s claims. Pretty good 🙂 But that's not the end of the story… In an effort to defend ourselves against their lawfare, we countersued. And last week, a jury in Delaware found Attentive liable for infringement on our Campaign Flows patent, and awarded us over $1.5M in damages. Yep–you read that right. They sued us, and ended up being the liable party + paying us damages. Now that’s justice. Maybe the biggest Uno Reverse Card I can remember. But, I still have a sour taste in my mouth. Why? Well, Attentive wasn’t exactly silent about their allegations over the last few years. They’ve left the market with the impression that Postscript infringed on their IP, which a court found to be false. But is anyone really surprised they went this route? Unfortunately, it’s extremely on brand. Ever since we exposed their bullying antics with phone number list holding, or pushed back on some of their other aggressive tactics over the years, we haven’t exactly been Attentive’s favorite. So we figured something like this might happen. The funny thing is, we aren’t against the idea of protecting your IP, especially when it’s actually innovative and the facts are strong. Postscript has a bunch of patents. But, in our opinion, their litigation was never about protecting intellectual property. And so they sued us. Without merit, as the Court has now found. In fact, Onsite Opt In replaced Two Touch popups over a year ago and has shown superior results consistently for merchants. But Attentive wanted to keep the suit going, clearly prioritizing lawfare and bullying over building better products for customers. Did they learn their lesson from the list holding controversy? Nope. Because this was always about a larger company that’s raised enormous sums of money with a historical pattern of bully tactics trying to push around a smaller, more innovative competitor. One that's become a thorn in their side, that they're afraid to compete with in the market. It’s a bummer they behave this way, because (contrary to what you might believe) we do welcome healthy competition. We want brands to win, we want the market to win, and it’s been frustrating to have to correct the record that we did not infringe on Attentive’s IP. At the same time, they’ve been banging the drum for years that they had a unique, disruptive technology that was exclusive to Attentive that could only be used by Attentive customers. That’s why we felt it was so important to defend ourselves and our customers and prove that Attentive didn’t really own what they said they did. And of course along the way, we did what we are known for, we innovated and launched something WAY more performant for list growth - Onsite Opt In. We left the outdated technology behind while Attentive continued litigating, burning resources on the past rather than innovating for the future. I truly wonder what their calculus has been–they’ve spent millions on this meritless lawsuit, all to have a court and jury declare that (1) Postscript’s two touch popups did not infringe and (2) in fact Attentive has been the one infringing on Postscript’s IP. Has this been a good use of time and money? What is the strategy over there? Why do they behave like this? Whatever the reason, we are proud to be vindicated by the court in this way. We will continue to do what we always do - innovate on behalf of our customers to make their SMS program as performant as possible. In fact, we’ve been so successful at innovation, Attentive has had to use our patented technology to keep up. We’ll continue setting the pace on behalf of Postscript customers everywhere. More to come, I’m sure. We will keep fighting the good fight. Thanks for your continued support! @ringmybeller on X

SMS Channel & Strategy

13 mentions

Brands see SMS driving strong returns via Postscript, though at least one deep-dive questioned whether the revenue math holds up under scrutiny.

Postscript just saved sms for everyone… AGAIN @Seanfrank on X

Platform, Tech Stack & Integrations

13 mentions

New features like Onsite Opt-in Engage and common Klaviyo pairings show up frequently, alongside a caution about differing attribution settings.

I just got back from my favorite thing that we do at @PostscriptIO . It's truly the highlight of the entire year for me. Earlier this week, we hosted our 2nd annual, Customer Advisory Board in Napa, California at Stanly Ranch. 🍷 We brought over 40 of our top customers to talk about the future of SMS and Conversational, see some of our exciting new roadmap, and to network with their peers. When you put together an amazing group of people, with an incredible venue and accommodations - magic happens. ✨ Shockingly, many companies and marketing teams DON’T invest in a customer advisory board. I’ve even heard some CFOs say “We already got these people as customers, why would we spend MORE money on them?” 🤯Crazy, I know. The truth is that listening to customers and investing in ways to get that feedback directly is the lifeblood of all good companies. The more you can ensure the voice of your customers is ringing in the ears of your employees, the better the company will be. Customers make your marketing better. They make your products better. They make your strategy better. I have never heard of a company who ever regretted investing in their customers. One of my favorite sayings is “Whoever is closest to the customer, wins.” I don’t love it just because it's a pithy little quote, I love it because it's true. If you aren’t investing in your customers now, start building the case for it immediately. You won’t regret it. Thank you to all our customers who took the time out of their busy schedules to join us. It truly means the world to us. 🙏 Finally, cheers to our amazing best in class event organization led by the amazing Angel Kinard. Special shout out to Vanessa Smith, Ren Reed, Ryan Holmes, Ben Montalbano and a ton of others at Postscript that I am missing. Here are some pics from the event. Yes, that's a giant owl. Yes, I was scared. @mikemanheimer on X

Customer Engagement, Segmentation & Retention

11 mentions

Successful onboarding stories and an active customer advisory community suggest strong retention practices, tempered by one critical revenue teardown.

Champagne day at the Nashville Postscript office (my bedroom office) Another brand has joined the 1,000,000 SMS subscriber club 🍾 They onboarded in 2023. Never touched SMS marketing. Zero phone numbers. Our team has been deeply involved since day 1. 2 years later. 1 milly. @BryanDickey_ on X

SMS Regulatory Compliance

10 mentions

Postscript's Texas SB140 court win is the standout story, seen as protecting customers from costly registration requirements competitors pushed.

I am so pumped to share this... we WON in texas. This means all Postscript customers are carved out from SB140 (the new texas sms law). To be extra clear, if you are a Postscript customer or EIA member, no registeration, bonding, disclosures, waking hours, etc. If you aren't a PS customer or EIA member, or you already registered in Texas, your situation is more complicated and you'll want to do your diligence. Unfortunately there's been tons of misinformation and bad advice spread by other players around this topic. Stoked to secure the bag for all our customers! And if you aren't a PS customer but want to work with by-far the industry leading SMS platform, you know where to find me 🙂 More from me below and in the blog post. @ringmybeller on X

Performance, ROI & Attribution

8 mentions

Most performance mentions are positive, framing SMS as a high-return channel, though attribution methodology draws some scrutiny.

Every brand is different and is free to allocate their resources however they like. Of course. BUT, to cut out SMS entirely means you believe a few things. 1) You believe the value of a double opt in number from a customer or prospect is $0. 2) email is growing and likely to grow its engagement in the future with shoppers. 3) email has higher revenue per recipient than sms. Think what you like, but all three of those things are 100% false. Plenty (I’m talking thousands) of 8 and 9 figure brands have SMS programs on Postscript that are equal or bigger in terms of revenue to email. We’ve done the incrementality tests (as @codyplof says). If you don’t have that, hit me up. DMs are open. 🤙🏼 @mikemanheimer on X

Business Growth & Market Positioning

6 mentions

Postscript's growth past $100M in revenue is noted as a milestone, with mixed sentiment on broader market positioning.

When I joined Postscript 4+ years ago my thesis was: 1) Ecommerce would continue to grow even with potential headwinds 2) Brands would coalesce under Shopify as the top player 3) SMS was the next frontier for direct marketing. Now we've passed $100M with more to come! @SamMelnick on X

Straight from the feed

Actual posts about Postscript — unedited, good and bad.

Sidenote from the Yotpo news. Last week, former frenemy and now just friend @robinreplies, called Postscript the "craft brewer of DTC". She didn't mean anything by it (in fact she was trying to be complimentary), BUT it got me thinking - all the craft brewers went out of business 😳. A bunch of the sms entrants have also gone out of business, shut down, or sold off for one reason or another. The list is actually kind of long: Via, Voyage, Retention Rocket, Emotive, SMS Bump (probably more). Over that time, we've grown a lot - like A LOT. We're speeding way up not slowing down. We're not really like a craft brewer, we're something else. I'm the CMO. We've been heads down delivering for customers for so long now, we haven't done a good job of showcasing our size, scale, and success. That's on me. Challenge accepted.🫡
@mikemanheimeron X· Aug 13, 2025
Tore down a $1.6M/year athleisure brand's SMS strategy this morning. They were spending $1,840/month on Postscript. SMS attributed revenue: $4,200/month Seems decent until you look at the numbers. What I found: SMS subscribers: 18,400 Messages sent last month: 22,100 Revenue: $4,200 Revenue per SMS subscriber: $0.23/month Industry benchmark: $1.20-2.40/month They were leaving $17,800-$39,700/month on the table. Here's what was broken: SMS Automation Count: 3 1. Welcome SMS (10% discount) 2. Abandoned cart SMS (same 10% discount) 3. Order shipped notification That's it. For an $1,840/month platform spend. What they were missing: No back-in-stock alerts (they sold out weekly) No browse abandonment (high-intent signal) No post-purchase check-in (engagement window) No win-back SMS (different urgency than email) No VIP early access (product launches 2x/month) No restock reminders (repeat purchase trigger) 18,400 subscribers. Only 2,800 getting any non-transactional messages per month. The other 15,600 just sitting there. Opted in. Never messaged strategically. The campaign strategy: Sent 2 SMS campaigns last month. Both: "New drop + 15% off" Same message to entire list. No segmentation by: - Purchase history - Engagement level - Product preference - VIP status Blasting everyone with the same promo. The timing conflicts: Customer journey example: Day 1: Browse product (trigger browse abandonment EMAIL) Day 1, +2 hours: Add to cart (trigger cart recovery EMAIL) Day 1, +4 hours: Receive cart recovery SMS Day 2: Receive browse abandonment EMAIL Day 2: Receive cart recovery EMAIL #2 Five messages in 36 hours. All saying basically the same thing. No coordination between email and SMS. The suppression gap: Zero SMS suppression logic. Sending campaigns to: - People who unsubscribed from email (conflicting preferences) - Recent purchasers (just bought, don't need promo) - Active cart abandoners (already in recovery sequence) Wasting sends on people who shouldn't get them. What we'd fix: Immediate (Week 1-2): - Add back-in-stock automation - Build browse abandonment SMS (45+ second threshold) - Create post-purchase SMS (day 3: "how's everything?") Month 2: - VIP early access SMS (48 hours before launch) - Win-back SMS (different messaging than email) - Restock reminder (consumption-based) Month 3: - Segment campaigns by purchase behavior - Add email/SMS coordination logic - Build suppression rules Expected outcome: SMS attributed revenue: $4,200 → $18,000-24,000/month ROI on $1,840 platform spend: Current: 2.3x Projected: 10-13x They were paying for a Ferrari. Using it like a bicycle. Most SMS strategies aren't bad. They're just incomplete.
@beingecomon X· Mar 10, 2026
Always make a point to check attribution windows. I was bringing over a client from postscript to Klaviyo for sms, and postscript had some crazy 7 day clicked attribution window. That massively affects the way results are compared when Klaviyo’s standard is 1 day for sms.
@InsendoMicahon X· Aug 28, 2025

Postscript: people also ask

Is Postscript worth it?

For SMS-first ecommerce brands, yes — merchants report strong returns and value its regulatory advocacy, though ROI claims should be checked against normalized attribution windows.

What do people complain about most?

The biggest gripe is Postscript's longer attribution window making SMS performance look better than apples-to-apples comparisons would show.

Postscript vs Attentive: which do people prefer?

Postscript gets more favorable buzz recently, largely fueled by its legal win over Attentive's patent suit and its Texas SMS law victory, both seen as wins for merchants.

Does Postscript help with SMS compliance?

Yes — Postscript successfully fought Texas's SB140 law in court, exempting its customers from registration, bonding, and disclosure requirements that competitors told brands to comply with.

⚔ Arch Rivals

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Postscript reviews, pricing, and alternatives

Yes, this paragraph is for the search engines. Is Postscript worth it? What do users really think of Postscript? Is Postscript good for email & sms? Are there cheaper Postscript alternatives? We don't sell a verdict — we aggregate real Postscript reviews from Reddit, X, and LinkedIn, tally the praise and the complaints above, and then, with great maturity, make Postscript fist-fight its rivals. Shopping around? See the best Postscript alternatives, ranked by what users actually say.

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