Klaviyo Email Services

Turn Klaviyo into a revenue engine. As a Master Platinum Klaviyo Partner, OuterBox designs high-performing email and SMS programs for eCommerce brands—pairing advanced segmentation, lifecycle automation, and conversion-focused creative to grow sales and retention.

Klaviyo Master Platinum Partner

Deep platform expertise, priority support, and proven performance.

1,000+ Client Relatioships

Trusted by startups to Fortune 500s to scale revenue.

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Recognized Expertise & Trusted Partnerships

A Klaviyo Strategy Built to Win eCommerce

We build Klaviyo programs that go beyond basic email blasts. Our team sets up advanced segmentation, automated flows (welcome, abandoned cart, post-purchase, win-back), and A/B testing frameworks that tie every send to revenue. Whether you're migrating to Klaviyo or scaling an existing account, we handle the strategy, design, and optimization so your team can focus on running the business.

Advanced Segmentation & Personalization

Use real-time behavior, purchase history, product affinity, and lifecycle stage to deliver hyper-relevant messaging that increases conversions and LTV—personalized subject lines are 26% more likely to be opened.

Lifecycle Automations that Print Revenue

Deploy high-impact flows—Welcome, Browse Abandon, Cart/Checkout Abandon, Post‑Purchase, Cross‑Sell/Upsell, VIP/Loyalty, Birthday, Review Request, Sunset, and Transactional—optimized for timing, content, and offers.

Email + SMS Orchestration

Coordinate email and SMS in a single Klaviyo canvas to minimize overlap, cap send frequency, and trigger the right message on the right channel at the right time. SMS marketing generates 11-20% of total revenue for the average eCommerce store.

Creative That Converts

Conversion-focused copy, modular templates, and dynamic content blocks that scale across campaigns, automations, and segments—without sacrificing brand.

Continuous Testing & Optimization

Always-on A/B testing for subject lines, send times, offers, and layouts—backed by cohort analysis and holdout testing to validate incremental lift.

Deliverability & List Health

Proactive domain warming, segmentation by engagement, sunset policies, and preference centers protect sender reputation and maximize inbox placement.

Attribution & Reporting

Klaviyo analytics plus GA4 and ad platform data tie campaigns to revenue, repeat purchase rate, and subscriber growth—so decisions are evidence-based.

Seamless eCommerce Integrations

Shopify, WooCommerce, BigCommerce, and Adobe Commerce connect directly to Klaviyo, enabling product feeds, predictive analytics, and customer data sync.

Why Work With OuterBox for Klaviyo

Master Platinum Klaviyo Partner with deep platform expertise.
Proven revenue impact: automation-led lifts and targeted upsell wins.
Full-funnel focus: acquisition to retention, not just blast campaigns.
1000+ clients, 20+ years, and 150+ custom integrations handled.
Email and SMS under one roof—coordinated journeys, higher ROI.
Data-driven strategy: segmentation, testing, and clear attribution.
Flexible engagement: full-service management or in-house enablement.
eCommerce specialists across DTC and B2B—Shopify, Woo, BigCommerce, Adobe Commerce.

OBX Client Growth

Performance highlights from recent email and SMS engagements.

Automation Revenue Lift

+133%

Zerbee after implementing Welcome, Cart, and Browse flows with enhancements.

Incremental Campaign Sales

$75k in 2 Months

Elk Springs Resorts upsell email based on real‑time availability and custom events.

Klaviyo Open Rates (Email)

Benchmarked & Optimized

Testing-led improvements tied to deliverability and engagement segments.

SMS Engagement

98%+ Open
36%+ Click

Source: SimpleTexting; integrated with Klaviyo for unified orchestration.

From Start-Ups to Fortune 500 Companies, Our Clients Are Succeeding Online

Klaviyo Email Marketing

Are You Ready to Rank #1

We’ll get back to you within 24 hours, Monday–Friday. Prefer to talk now? Call 1-866-647-9218 (9–5 EST).

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Hear from our Clients

Client Results & Proof

VP of eCommerce

Company Confidential

“OuterBox transformed our Klaviyo program—automation revenue lifted fast, while campaigns became more targeted and on-brand.”

Case Studies:

Two examples of how strategic automations and targeted offers drive measurable revenue impact.

Zerbee

+133% Revenue

Implemented Welcome Series, Cart & Browse Abandon flows with optimization enhancements.

Elk Springs Resorts

$75K Sales in 2 Months

Triggered upsell emails using custom events and real‑time availability signals.

Meet OuterBox

OuterBox is a digital marketing agency specializing in SEO, paid media, eCommerce development, conversion rate optimization, and lifecycle marketing. Since 2004, our 250+ U.S.-based experts have helped 1,000+ businesses grow through data-driven strategies and integrated execution. Recognized by Clutch, the Inc. 5000, and as a Google Premier Partner, we bring transparency, expertise, and a relentless focus on measurable outcomes.

Work With Us

20+ Years

Digital Marketing Agency

1000+

Successful Client Partnerships

2M+

Page #1 Google Rankings

250+

USA-Based, In-House Experts

Awards & Partnership Recognitions

Unlock Your Business’s Potential

Send us your website for a free quote and strategy session from OuterBox, tailored to drive success.
Need an expert now? Call 1-866-647-9218

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Klaviyo Email Marketing FAQs

What makes Klaviyo ideal for eCommerce?

Klaviyo natively integrates with Shopify, WooCommerce, BigCommerce, and Adobe Commerce, syncing orders, browsing, and product data. This powers advanced segmentation, dynamic content, and lifecycle automations tied directly to customer behavior and revenue—email marketing generates $36-$42 for every $1 spent.

How does segmentation improve results?

Segmentation tailors messaging by engagement, lifecycle stage, product affinity, and past purchases—boosting relevance, improving deliverability, and increasing conversion and retention rates.

Can Klaviyo integrate with my existing tools?

Yes. Klaviyo supports robust integrations across eCommerce platforms, CRMs, review apps, loyalty programs, and payment providers, enabling efficient data flow and unified reporting.

What analytics can I expect?

Klaviyo tracks opens, clicks, conversions, revenue per recipient, attributed sales, and cohort performance. We enrich this with GA4 and ad platform data for full-funnel attribution and test validation.

How quickly will we see results?

Most brands see early gains within 30–60 days as foundational flows (Welcome, Abandonment, Post‑Purchase) go live and quick wins in segmentation and deliverability are implemented.

Do you manage SMS along with email?

Yes. We plan and orchestrate SMS within Klaviyo alongside email, using channel-specific frequency caps, compliance best practices, and coordinated testing to maximize incremental lift.

Which automations drive the most revenue?

Top performers typically include Welcome Series, Cart/Checkout Abandon, Browse Abandon, Post‑Purchase cross‑sell, and VIP/Loyalty flows—each tailored to your buying cycle and AOV.

How do you protect deliverability?

We use domain authentication, engagement-based sending, list hygiene and sunset policies, preference centers, and gradual IP warming—all monitored with inbox placement and spam trap checks.

Can you migrate us from our current ESP to Klaviyo?

Yes. We handle data mapping, consent and opt-in preservation, template rebuilding, automation re‑creation, and domain warming to ensure a smooth and safe transition.

How do you tie Klaviyo performance to revenue?

We combine Klaviyo attribution with GA4, ad platforms, and controlled holdout tests to isolate incremental impact, then report at the flow, campaign, and segment levels.