Something is quietly fracturing the SMS marketing ecosystem — and the people closest to it say the fault lines run directly between Attentive and Postscript. According to multiple sources close to the matter, Attentive has been running what insiders are calling an “agency acquisition blitz” since at least Q1 2026, reportedly offering co-marketing funds, elevated commission structures, and dedicated partner success managers to agencies that have historically been aligned with Postscript’s platform. The alleged campaign is said to be targeting mid-market agencies generating between $2M and $8M annually in SMS-attributed revenue for their clients — precisely the tier where Postscript has held its strongest foothold.
What exactly is Attentive allegedly offering agency partners to switch?
Sources familiar with the outreach describe a tiered incentive package that is, by one agency principal’s account, “hard to ignore.” The reported terms include a 25–30% revenue share on new client introductions (up from a standard 15% range), guaranteed co-marketing placement in Attentive’s partner marketplace, and direct access to Attentive’s AI Journeys team for white-glove onboarding of migrated accounts. One growth agency owner based in Austin, who asked not to be named, told us the pitch landed in their inbox in February and included a migration playbook for moving Postscript clients with “zero downtime” during list transfer.
“The offer was structured more like an acquisition than a partnership conversation. They wanted exclusivity within 90 days. That’s not a partner program — that’s a land grab.” — Agency principal, Austin TX, identity withheld at request
Attentive did not respond to requests for comment by press time. Postscript co-founder and CEO Adam Turner, reached via a spokesperson, declined to address the partner poaching allegations directly but said the company had seen “no material change” in agency retention metrics through Q1 2026.
Is Postscript actually losing ground in the agency channel?
That’s where the picture gets complicated. Sources close to the matter say the defection rate is real but modest — somewhere between 8 and 12 agency partners representing an estimated $40–60M in combined client SMS spend have either switched platform allegiance or entered “evaluation mode” for Attentive since January, according to one person with knowledge of Postscript’s partner dashboard data. That number remains unconfirmed and Postscript disputes any significant churn. Still, the rumor has been enough to generate visible anxiety inside Postscript’s Slack channels and among agency operators who follow platform dynamics closely.
The alleged defections reportedly include at least two Shopify-focused retention agencies with significant eight-figure client portfolios, though none have publicly announced a platform shift. One agency leader who works primarily with DTC apparel brands said his team had completed a side-by-side benchmark of both platforms in March and found Attentive’s AI-generated send-time optimization outperforming Postscript’s comparable feature by roughly 11% on revenue-per-send in their test cohort. “That delta is real,” they said. “And when Attentive is also writing you a $30,000 co-marketing check, the math changes.”
How does this fit into Attentive’s broader 2026 enterprise strategy?
Industry observers say the agency push isn’t happening in a vacuum. Attentive CEO Brian Long has been vocal in investor circles about the company’s ambition to consolidate the retention marketing category — SMS, email, and push notifications — under a single AI-driven platform. The company’s reported $3.1B valuation, last pegged in its 2024 funding round, appears to be fueling an aggressive go-to-market posture that several insiders describe as “playing offense on every front simultaneously.”
“Attentive isn’t just competing with Postscript anymore. They’re trying to make themselves the Klaviyo of the SMS layer — and using the agency channel to do it fast.” — Director of ecommerce strategy at a mid-size DTC agency, identity withheld
Notably, Attentive hired a reported six new agency partnership managers between January and April 2026, according to LinkedIn activity reviewed by Ecommerce Times. Several hires came directly from Postscript and, interestingly, from Klaviyo’s partner ecosystem team — a detail that has not gone unnoticed by observers who track talent movement as a leading indicator of competitive strategy.
What does this mean for brands currently on Postscript?
For Shopify merchants running SMS through Postscript, the short-term operational risk is low — both platforms are stable, well-supported, and deeply integrated with Shopify’s checkout and Flow automation suite. But the longer-term concern, according to several retention marketers, is what happens to product velocity if Postscript is fighting a two-front war: defending its agency channel while also competing on AI feature development against a better-capitalized rival.
Sources say Postscript has responded internally by:
- Accelerating the rollout of its own AI send-time personalization feature, reportedly now in beta with approximately 60 agency accounts
- Offering quarterly business reviews (QBRs) to all agency partners managing $500K+ in monthly SMS revenue — a perk previously reserved for enterprise-tier clients
- Launching a dedicated “Postscript Certified Agency” badge program with SEO co-marketing benefits, announced quietly in late April
- Reportedly having preliminary conversations with at least two strategic investors about a growth round that would fund go-to-market acceleration
None of these moves have been officially announced. Postscript’s spokesperson confirmed only that the company had “expanded partner enablement resources in 2026” without providing specifics.
Are there other SMS players benefiting from the chaos?
Potentially. Sources say Klaviyo’s SMS product — long considered the “good enough” option for brands already on its email platform — has been quietly picking up evaluation calls from agencies caught in the crossfire. Klaviyo’s unified email-plus-SMS pitch becomes more compelling when an agency is questioning platform allegiances anyway. Meanwhile, newer entrants like Yotpo’s SMS product and the increasingly aggressive Sendlane have reportedly been stepping up outreach to agencies in the 10–50 client range, sensing an opportunistic window.
One Yotpo enterprise sales lead, who spoke on background, said inbound interest from agencies had increased “meaningfully” since March, though she declined to quantify the claim or confirm it was related to the Attentive-Postscript dynamic specifically.
What’s the broader implication for the SMS marketing vendor landscape?
The alleged agency poaching campaign — if it plays out as sources describe — signals something larger than a competitive skirmish between two well-funded startups. It suggests that the SMS marketing platform wars of 2024 and 2025, which were largely fought on feature benchmarks and pricing pages, have now moved into the agency channel as the decisive battleground. Whoever controls the agencies controls the mid-market merchant layer, and that’s where the majority of Shopify brand spend actually lives.
“Agency loyalty in this space has always been transactional, but the speed at which Attentive is reportedly moving is unusual. It feels like someone turned on a timer.” — Retention marketing consultant with clients on both platforms
For DTC founders and Shopify operators watching from the sidelines, the practical advice from agency leaders we spoke with is consistent: lock in multi-year pricing if your current SMS platform offers it, audit your list portability terms, and make sure your agency partner’s platform allegiance is disclosed — because in 2026, that disclosure matters more than it ever has. Whether Attentive’s reported agency blitz succeeds in fundamentally reshaping the SMS vendor landscape, or whether Postscript manages to stabilize its partner network, will likely become clear in the back half of the year, when Q3 contract cycles typically force platform decisions into the open.
