Add 20-40% more revenue with email & SMS in 90 days.
Fully managed Klaviyo email and SMS. We build the flows, send the campaigns, and grow your list. One system, one goal: more revenue from the customers you already paid to acquire.
Guaranteed minimum 30% attribution by month 3. No lock-in contracts.
Built by Ex-Klaviyo and an 8-figure DTC brand in-house email marketer.
Before founding Momentum, Charlie worked at Klaviyo, giving him an inside understanding of the platform. He then crossed the table to become an ecommerce operator, co-building an eight-figure DTC brand where retention became one of the company's largest revenue channels.
That experience shaped Momentum's philosophy: the best retention marketing doesn't come from theory. It comes from running a business where every email and SMS directly impacts profit.
Today, Momentum manages retention for 15+ brands, generating more than $6 million in email and SMS revenue in 2026 alone.
Charlie Yoo
Founder, Momentum Marketing Labs
Trusted by brands like
Revenue driven by email & SMS
Of clients hit 30%+ attribution by month 3
Generated for a single client
Days to results
Figures from recent client results, anonymized by request.
One system. Three engines.
Most agencies run email in a silo. We engineer list growth, automation, and campaigns as one machine, every piece feeding the next.
List Growth
Turn more of your traffic into owned audience.
- High-converting popups & opt-in offers
- Email + SMS capture, sequenced properly
- Offer testing, not set and forget
- Quiz & gamified capture where it fits
Automated Flows
Revenue that runs while you sleep.
- All pre-purchase flow sequences
- All post-purchase flow sequences
- Healthy deliverability & list hygiene
- Unlimited A/B testing
Campaigns
A consistent send engine, not random blasts.
- Unlimited campaign sends, no per-email fees
- Design + copy done for you
- Segmentation that doesn't annoy your VIPs
- Weekly reporting on what actually made money
You're paying for customers you never talk to again.
Your customer journey ends after checkout.
You spend thousands acquiring customers, then leave repeat purchases to chance. Every missed follow-up is revenue you've already paid to acquire.
You're buying customers instead of building them.
Most brands obsess over acquiring new customers while neglecting the people who have already bought. The cheapest sale you'll ever make is the second one.
Every repeat purchase lowers your CAC.
As acquisition costs keep rising, retention becomes your biggest profit lever. More repeat purchases mean more revenue without spending another dollar on ads.
Retention isn't a side project. It's the margin in your business.
Book a CallBrands don't stay for promises. They stay for numbers.
$2.4M+
generated
Our biggest client. A sustained retention engine driving 40-55% of total revenue through email & SMS, month over month.
30%
attributed revenue
From a standing start to 30%+ of revenue attributed to email within the first three weeks of onboarding.
4-5% → 35%+
attributed revenue
Inherited basic flows doing 4-5%. Rebuilt the program and scaled attribution to 35%+ in about five weeks.
35% → 40%+
attributed revenue
Hit 35%+ attributed revenue within five weeks, on track to close the month above 40%.
Clients anonymized by request. Named case studies, testimonials & video to be added with written permission.
The 90-day sprint.
- 01
Week 1
Deep-Dive Audit
We tear down your Klaviyo account, list health, flows, and past sends. You get a revenue roadmap before we build anything.
- 02
Weeks 2-4
Foundation Build
Core flows rebuilt and launched, opt-in capture overhauled. The always-on revenue layer goes live first.
- 03
Weeks 5-8
Campaign Engine
Monthly calendar, weekly sends, design and copy handled. Volume goes up without deliverability going down.
- 04
Weeks 9-12
Scale & Compound
We double down on what the data says is working. By day 90, email & SMS are driving 30-40% of your revenue, with a guaranteed 30% minimum.
Why brands switch to us.
Questions, answered.
We guarantee a minimum of 30% of your revenue attributed to email & SMS by the end of month three, and the 90-day sprint is built to push you toward 40%. It's a number we hold ourselves to: 100% of our clients hit 30%+, and 70% reach 40%+, by month three. We'll walk you through exactly how it works on the call.
We offer both a performance based structure and a flat retainer. The full details are discussed on your initial call.
No lock-in contracts. We earn the relationship month to month. If we're not making you money, you shouldn't be paying us.
Most setups run email as an isolated channel. We run list growth, flows, and campaigns as one system with one number that matters: revenue per subscriber. The audit will show you the gap in your first week.
Klaviyo access, brand assets, and roughly 30 minutes a week. Design, copy, strategy, QA, and reporting are all on us.
We're Klaviyo specialists for email and SMS. If you're on another ESP, we handle the migration inside the sprint.
Your list is already worth 30-40% of your revenue. Let's go get it.
Book a free strategy call. We'll audit your account live and show you exactly where the money is, whether you work with us or not.
Book a Call20 minutes. No pitch deck. Real numbers.