The shift is already happening. 94.6% of teams that went mobile-first say it outperforms their email-first strategy, and 91.9% of marketers plan to pilot WhatsApp, RCS, or LINE in the next 12 months. But the teams winning aren't just adding channels — they're getting three harder things right: orchestrating across a fast-growing mobile stack, building compliance in from day one, and matching the right transactional-vs-promotional mix to every audience they serve.
The "email-first" era is visibly ending. Only 30.6% of marketers still run email as their primary channel — and nine out of ten of them say they're actively planning or exploring a move to mobile-first. The teams that have already made the jump aren't second-guessing it.
Mobile-first isn't a bet — it's a performance story. Among teams that have already shifted, 35.1% report a 25%+ lift in engagement or conversion, and another 59.5% see a 10–25% lift. And the lift isn't concentrated in one place: promotional campaigns, transactional alerts, and loyalty programs are all being won on mobile. Combined with 89.5% of email-first teams planning to move, the 2026 default for customer engagement is mobile.
SMS still anchors mobile messaging for most teams — but it's no longer the only game in town. WhatsApp is now the second most-used channel, RCS is emerging fast, and in-app messaging is already in active use at 70.2% of teams.
Each card is one respondent's self-reported campaign from the past year — individual data points, not synthesized averages. Together the five span SaaS, Fintech, and Construction, and mix single-channel, multi-channel, promotional, and transactional plays.
We asked all 124 respondents: "What's the biggest change you expect to make to your mobile messaging strategy in the next 12 months?" These are the five most-cited themes in their answers. The remaining responses described smaller themes or company-specific plans — so the shares below don't sum to 100%.
The mobile stack is broadening, not consolidating. WhatsApp is now in active use by 72.6% of marketers — second only to SMS — and of those who've gone live with WhatsApp, RCS, or LINE, 91.8% say performance has met or exceeded expectations. And the way in-app and rich push are being used — 47.6% for onboarding walkthroughs, 36.3% for surveys and NPS, 33.1% for images and media in push — shows the shift from one-way broadcast to two-way relationship-building. For marketing teams, the question in 2026 is no longer "should we add another mobile channel?" but "which ones, and how do we orchestrate them together?"
More channels, more data, and more expectation from customers — but most teams are still stitching it together by hand. Only 1 in 3 marketers have a documented cross-channel playbook. Only 17.8% have reached 1:1 personalization. And the #1 challenge holding everyone back is the same: the data isn't good enough, and the channels don't talk to each other.
We asked all 124 respondents: "What is your biggest frustration with your current mobile messaging setup?" These are the five most-cited patterns — each one a direct symptom of the orchestration gap. The remaining responses were unique to specific setups or too brief to cluster, so the shares below don't sum to 100%.
Channel sprawl is outrunning orchestration maturity. 64.5% of marketers lack a documented cross-channel playbook, and 82.2% haven't reached individualized, 1:1 personalization. The #1 blocker isn't tools — it's data quality (cited by 38.7% as the top personalization barrier). And while 51.6% say they're "very confident" in attribution, nearly as many (47.6%) admit they can see trends but not the full picture. The teams winning on mobile aren't the ones running the most channels — they're the ones with unified customer data, real-time triggers, and a single orchestration layer that can decide the right channel in the moment.
Compliance used to be something marketers worked around. In 2026, it's increasingly something they buy for. For nearly 3 in 10 marketers, compliance is either the primary constraint on their strategy or actively limiting their programs today — and when asked what would help most, the top answer isn't more regulatory guidance. It's built-in compliance features in the messaging platform itself.
29.8% of marketers say compliance is either the primary constraint on their mobile strategy or actively limiting what they can do. And when asked what would help most, the #1 answer — from 31.5% of respondents — is built-in compliance features inside the messaging platform itself. Marketers don't want more regulatory PDFs; they want the guardrails baked into the tool. For teams operating in regulated industries, the compliance capabilities of the messaging platform have quietly become a buying criterion.
Here's where most mobile strategies quietly break down: teams treat mobile as one channel when it's really three different jobs at once. B2B marketers use it as a transactional utility. B2C teams use it as a marketing megaphone. Hybrid businesses need both — and most businesses are hybrid. Getting the transactional-vs-promotional mix right for each audience isn't a nice-to-have; it's where mobile strategies win or lose.
The teams winning on mobile aren't forcing one playbook onto different audiences. They're running distinct lifecycle logic for B2B accounts, B2C consumers, and hybrid segments — on a single platform, with one view of every customer. That's the real mobile-first capability gap: not sending more messages, but sending the right mix, to the right audience, on the right channel, at the right moment. That's the work.
Customer.io unifies SMS, push, in-app, WhatsApp, and email in a single platform — with the real-time data, behavioral triggers, and cross-channel orchestration today's marketing teams need to move beyond email-first. With HIPAA-eligible infrastructure and built-in compliance controls, Customer.io is trusted by regulated industries and consumer brands alike. Whether you're piloting RCS, scaling WhatsApp, or rebuilding your lifecycle program around mobile, Customer.io is where the mobile-first playbook comes to life.
See Customer.io in Action →This report is based on an original survey of marketing leaders actively managing mobile messaging programs at companies with $10M+ in annual revenue, fielded in April 2026.