Shopify Plus Partner
From Shopify DTC to every major marketplace: one team, one stack.
Most Shopify agencies build the store and stop. Sequence connects your Shopify Plus storefront to Amazon, Walmart, and TikTok Shop, with catalog sync, unified attribution, and Klaviyo retention running on the same stack. $500M+ in revenue managed. Same team for DTC and marketplace, so the channels finally talk to each other.
What is a Shopify marketplace integration agency?
Not a Shopify dev shop. Not an Amazon agency. The team that connects the two and runs both as one stack.
A Shopify marketplace integration agency is a managed-service team that builds and operates your Shopify Plus storefront and simultaneously runs your presence on Amazon, Walmart, and TikTok Shop, with catalog sync, unified attribution, and shared creative across every surface. The differentiator isn't Shopify development. It's whether the team running your store also understands what happens when your customer leaves Shopify and shows up on Amazon two weeks later.
Most Shopify agencies sell the store build, the Klaviyo flows, and the theme customization, then hand off the marketplace question to a separate Amazon vendor. The result: two agencies arguing about whose attribution model is right, while full-funnel ROAS (return on ad spend across every channel) drops 20% to 40%. Sequence holds Shopify Plus Partner status alongside Amazon Ads Verified Partner, Walmart Connect Partner Network, and TikTok For Business partnerships.
Sequence is built for brands doing $1M to $100M in annual revenue who already run a Shopify store and want to scale beyond it. It also fits marketplace-native brands ready to launch DTC with the team that already runs their Amazon business.
One channel isn't enough. The agencies that pretend otherwise lose your data.
Separate DTC and marketplace vendors leave 30% to 60% of conversions attribution-orphaned, meaning no platform can credit the sale to the ad that caused it. The brand pays for both. Neither agency claims the result. The CFO sees flat ROAS. Here's what changes when one team runs both.
| Capability | Shopify-Only Agency | Marketplace-Only Agency | Sequence Integrated |
|---|---|---|---|
| Builds Shopify Plus stores | Yes | No | Yes |
| Runs Amazon & Walmart | No | Yes | Yes |
| Catalog sync (Shopify → marketplaces) | App-only | No | Managed sync |
| Klaviyo + retention | Yes | No | Yes |
| Unified DTC + marketplace attribution | DTC blind to Amazon | Marketplace blind to DTC | Triple Whale + AMC bridge |
| Same creative across both | DTC-only | Marketplace-only | Unified asset library |
| One point of accountability | For DTC only | For marketplaces only | For both surfaces |
Shopify discovers them. Amazon converts them. Klaviyo keeps them.
A four-stage loop compounds revenue across surfaces when one team runs all of it.
How Shopify and marketplaces feed each other under one stack
Nine services. One team. One invoice.
Everything you need to run Shopify and marketplaces in lockstep, without bolting on three more vendors.
Shopify Plus Development & Design
Theme customization, headless commerce, custom apps, checkout extensibility, B2B + retail location setup. We build for brands that plan to scale to marketplaces, so the architecture supports it from day one.
- Custom theme development on Shopify Plus + Online Store 2.0
- Headless Hydrogen storefronts for performance-first brands
- Checkout extensibility + Shop Pay optimization
- B2B + wholesale channel buildout
- Speed and Core Web Vitals work, targeting a Lighthouse performance score of 90+
Shopify → Amazon Sync
We manage the catalog feed, inventory sync, and pricing parity. Your Shopify SKUs flow into Amazon Seller Central without spreadsheet maintenance.
Catalog · InventoryShopify → Walmart Sync
Walmart Marketplace seller setup, fed directly from your Shopify catalog. Walmart Connect ads on top.
Walmart MarketplaceShopify → TikTok Shop
Connect your Shopify catalog directly to TikTok Shop. Run Spark Ads and manage creator affiliate campaigns from one dashboard.
TikTok Shop · Spark AdsKlaviyo + Retention
We run email and SMS automation, segmentation, lifecycle flows, and post-purchase nurture. Klaviyo Master Partner.
Klaviyo · SMS · PostcardsConversion Rate Optimization
We run A/B tests, build landing pages, optimize product detail pages (PDPs), and recover abandoned carts. We measure conversion rate (CVR) weekly and ship optimizations every two weeks. Target: a 15% conversion rate lift within the first 90 days.
CRO · A/B · CVRUnified Attribution
Triple Whale + Amazon Marketing Cloud bridge. See how Meta and TikTok ad spend drives Shopify conversions and downstream Amazon repeat purchases. Full-funnel ROAS measured against platform-reported conversions.
Triple Whale · AMC · GA4Shopify SEO + Content
Technical SEO, schema markup, blog content, collection optimization, AIO/GEO for AI search visibility. The same SEO team runs your Amazon organic ranking work, so keyword strategy stays consistent across both surfaces.
SEO · Schema · AIOAI-SEO for Shopify
Get your Shopify store cited by ChatGPT, Perplexity, Gemini, Claude, and Google AI Overviews when buyers ask AI for products in your category. Full eight-schema stack, entity graph engineering, off-page citation building, and content strategy for AI extraction. Honeybee Gardens saw a 200% lift in AI citations across five engines in 60 days on our stack.
Learn more →Official certifications across every surface your stack touches.
Platform partnerships give us access to APIs, beta features, and direct rep relationships that non-partner agencies do not get.
How Joe Boxer compounded Shopify + Amazon together.
Iconic American apparel brand. A legacy Shopify store was underperforming on marketplace. One team took over both surfaces on one stack.
Joe Boxer
The challenge: a legacy Shopify storefront with a declining conversion rate, paired with a fragmented Amazon presence run by a separate vendor. Cross-channel attribution was broken. Customer LTV was opaque. Sequence took over both surfaces, rebuilt the Shopify Plus theme, synced the catalog, and unified the attribution stack.
Sequence is the rare agency that runs our Shopify store and our Amazon presence as one program. Same dashboard, same standup, same accountability. Our cross-channel ROAS finally tells the truth. It tells a much better story than two separate vendors did before.
The four-stage Shopify and marketplace engagement.
The same flywheel pattern as every Sequence engagement, adapted for DTC and marketplace integration.
Audit
Full Shopify theme review, app stack audit, Klaviyo flow audit, catalog feed audit, marketplace presence review. We tell you what's working, what's broken, and what cross-channel money you're leaving on the table.
Plan
90-day integrated roadmap: Shopify Plus dev backlog, marketplace expansion priorities, Klaviyo + retention plan, attribution stack setup. You see exactly where every dollar goes before we ship.
Activate
Shopify theme work begins, catalog sync goes live, Klaviyo flows ship, marketplace listings published, attribution stack stitched. Single weekly dashboard across DTC + marketplaces.
Compound
Bi-weekly CRO ships, monthly Shopify SEO + listing updates, quarterly business reviews on the full-funnel ROAS. The flywheel gets faster every quarter. That is the entire point.
Shopify agency FAQs
What is a Shopify marketplace integration agency?
Is Sequence a Shopify Plus Partner?
Do I need to be a Shopify Plus brand to work with Sequence?
How does Shopify → Amazon catalog sync work?
Can Sequence migrate my existing store to Shopify Plus?
Can Sequence work with my existing Amazon agency if I just want Shopify help?
How does unified attribution work across Shopify and Amazon?
Does Sequence offer Klaviyo or just hand it off to another vendor?
What's the typical timeline from kickoff to seeing results?
Ready to run Shopify and your marketplaces as one stack?
We'll show you exactly what your current Shopify + marketplace mix is leaving on the table: the attribution gaps, the catalog sync issues, and the cross-channel ROAS you are not capturing.
Get a quote →