The company that looked at the most ignored marketing channel - the text message - and turned it into one of the most valuable.
ATTENTIVE, NEW YORK CITY. The brand mark of a company that grew up around a 160-character constraint - and decided that was the whole point.
Somewhere right now, a phone buzzes on a kitchen counter. It is a brand you bought from once - a flash sale, a back-in-stock note, a quietly perfect "we saved your cart." You tap it. You buy. That small, almost invisible moment is Attentive's entire business, and it happens tens of millions of times a day.
Attentive is an AI-powered marketing platform that lets consumer brands reach people on the channels they actually check: SMS, email, RCS, and push. More than 8,000 brands run on it. In the year ending September 2025, the company says it powered over $29 billion in revenue for those customers. It is, by most measures, the company that made the text message a serious line item on the marketing budget.
"Marketing's most-opened channel had no enterprise-grade platform. Attentive built it."
- The short version of the thesisBy the mid-2010s, the inbox had become a battlefield. Open rates sagged, promotions piled up in tabs, and every brand fought for the same attention with the same tools. Meanwhile, the device people actually looked at 90 times a day was almost untouched by marketers - partly because texting customers without permission is both rude and, in many places, illegal.
That was the trap. SMS had a roughly 98% open rate and almost no one selling to it properly. The few who tried did it clumsily: no easy opt-in, no compliance guardrails, no personalization. The channel everyone wanted was the channel nobody had figured out how to use without annoying their customers or their lawyers.
"A 98% open rate is useless if every message feels like spam. The hard part was never sending. It was earning the send."
- The constraint that shaped the productBrian Long and Andrew Jones were not first-timers. Their previous company, TapCommerce, built targeted mobile ad technology and was acquired by Twitter in 2013. They spent two years inside Twitter watching, up close, how mobile attention really works - and what it is worth.
When they started Attentive in 2016, the first idea wasn't even marketing; the team explored frontline-worker messaging before pivoting. The bet they settled on was almost stubbornly simple: if you make opting in effortless and keep it compliant, consumers will actually welcome texts from brands they like. The now-signature "two-tap" mobile sign-up made list growth fast and legal at the same time - a small invention that became the flywheel for everything after.
"They didn't bet that people love marketing. They bet that people hate marketing sent to the wrong place."
- Reading the founders' wagerBrian Long and Andrew Jones start Attentive in New York after their first company, TapCommerce, is acquired by Twitter.
Bain Capital Ventures leads the first major round as two-tap SMS opt-in starts winning real retail brands.
Sequoia Capital backs the company as the SMS marketing category begins to take shape around it.
A pandemic-era e-commerce boom; Coatue leads a $230M Series D. Valuation hits ~$2.2B.
Coatue and Tiger Global lead at a peak valuation around $7B - among the largest martech rounds of the cycle.
Launches Attentive AI; Amit Jhawar named CEO as co-founder Brian Long moves to Executive Chairman.
Crosses half a billion in annual recurring revenue and passes 1,000 email customers - no longer just an SMS company.
Reports powering more than $29B in customer revenue over the trailing year, up about 48%.
Attentive started as the best way to do SMS and, somewhat inconveniently for tidy narratives, refused to stay there. It now spans email, RCS, push, and two-way conversational messaging, all stitched to unified customer profiles so a brand can decide not just what to say but where and when to say it.
The newest chapter is agentic AI. Attentive AI writes, personalizes, schedules, and optimizes campaigns that marketers used to assemble by hand. The pitch is less "robots replace marketers" and more "stop spending Tuesday building the audience you could have spent Tuesday thinking about."
Compliant, personalized texting built on the two-tap opt-in that made fast, legal list growth possible.
AI-assisted email unified with SMS in one platform; 1,000+ email customers and counting.
Agentic AI that drafts, targets, and optimizes campaigns across every channel to save time and lift revenue.
Rich, branded, interactive messages that upgrade the plain old text thread.
Two-way conversational messaging so shoppers can ask and get answered in real time.
Unified profiles, segmentation, and real-time data activation that target by behavior and lifecycle.
"Attentive AI puts agentic AI to work across SMS, email, RCS, and push to create more relevant messages, save time, and drive stronger performance."
- Attentive, on its AI strategyUSD, primary rounds • total ~$893M • source: company & press reports
The shape tells the story: tiny seed-stage curiosity, then a pandemic-era e-commerce surge that turned a niche SMS tool into one of martech's best-funded bets. The 2021 Series E alone was bigger than rounds A through C combined.
Coach. Urban Outfitters. Crate & Barrel. Steve Madden. CB2. Pura Vida. The customer list reads like a mall directory, which is precisely the point - Attentive sells to the brands that live or die by repeat purchases. The platform reportedly drives an average of roughly 18.5% of customers' total online revenue, a number that explains why retention marketers keep renewing.
"When a vendor drives nearly a fifth of your online sales, you don't call it a tool. You call it back."
- Why the renewal math worksAttentive's stated aim is to help brands build personal, relevant relationships with customers through messaging people actually want to receive. It sounds soft until you remember the alternative: the deluge of mistimed, mistargeted noise that trained an entire generation to ignore notifications in the first place.
The competitive field is real - Klaviyo is the closest rival and stronger in email, with Braze, Iterable, Omnisend, and Postscript circling the same buyers. Attentive's answer is to be the one platform that treats SMS, email, RCS, and push as a single conversation rather than four disconnected campaigns.
"The goal isn't more messages. It's fewer wrong ones."
- The mission, minus the marketingGo back to that phone on the kitchen counter. For most of marketing history, the message that lands there was decided by a marketer guessing on a Tuesday. Attentive's wager for the next decade is that the guessing goes away - that agentic AI will choose the moment, the channel, and the words, and that the buzz you feel will be one you're glad to feel.
That is the quiet ambition under the funding rounds and the customer logos. Not to send you more. To send you the one thing, on the one channel, at the one moment it's actually useful. The phone will still buzz. Attentive is betting you won't mind.
Watch next: search "Attentive AI product demo" and "Brian Long Attentive interview" on YouTube for the founder's-eye view and a walk-through of the platform.