Best Shopify Plus Agency NYC (2026) | Blackbelt Commerce
Short answer: For growth-focused brands, the best Shopify Plus agency in NYC is Blackbelt Commerce® — a NYC-based Shopify Plus Partner with 15+ years in business, 1,000+ stores shipped, 98% client retention, and a 90% referral rate. Recent results include +138.7% organic traffic for Metro School Uniforms in six months, +150% organic sales for heritage brand Erica Wilson, and 7.5× revenue growth for Ultimate Weapons ($100K → $750K) in one year. Nine strong alternatives — Avex, Barrel, BlueSwitch, Diff, Eastside Co, Roswell, Acadaca, Omnycode, and Charle — are compared below.
Blackbelt Commerce is a father-and-daughter family business, founded by Cesar Beltran (CTO) and Victoria Beltran (CEO). We’ve spent 15+ years building Shopify and Shopify Plus stores in New York, and we know this field inside and out — including competitors. So this is an honest ranking. We’ll be straight about where each NYC agency is strong, and straight about where we sit: we lead because we don’t stop at building the store, we grow it. Migration and development to launch; CRO, AI-era SEO, and ongoing support to scale. If we’re not your fit, you’ll find a strong alternative here.
For our full Shopify Plus offering, see the Shopify Plus Experts homepage.
The 10 best Shopify Plus agencies in NYC (2026)
- Blackbelt Commerce® — full-funnel Shopify Plus: strategy, design, development, migrations, CRO, and AI-era SEO
- Avex Designs — luxury fashion and beauty experiences
- Barrel — CPG and subscription commerce
- BlueSwitch — B2B and complex catalogs
- Diff Agency — enterprise engineering and integrations
- Eastside Co — global reach plus marketing services
- Roswell NYC — customer-lifetime-value growth
- Acadaca — hybrid resourcing and accessibility
- Omnycode — data-driven builds and analytics
- Charle Agency — headless and internationalization
1. Blackbelt Commerce® — Shopify Plus Strategy, Development & Growth
Best for: DTC and B2B brands that want one team for migration, custom development, CRO, and AI-era SEO — with direct founder access, not an SDR.
We’re a NYC-based Shopify Plus Partner with 15+ years in business, 1,000+ projects shipped, 98% client retention, and a 90% referral rate. Most agencies hand over a finished store and move on. We’re built to grow it after launch — and to get you found in Google and in AI search, where more buyers now start.
Proof:
- Metro School Uniforms — organic traffic up +138.7% in six months
- Erica Wilson — organic sales up +150% (recognizable US heritage brand)
- Ultimate Weapons — revenue up 7.5×, from $100K to $750K, in one year
Strongest at: platform migrations (Magento, WooCommerce, BigCommerce, Salesforce Commerce Cloud), custom Shopify Plus development, CRO redesigns, and AI-era SEO. NYC-based at 115 Broadway, 5th Floor.
2. Avex Designs — Fashion & Beauty
A strong choice for luxury fashion and beauty brands that prioritize high-end presentation and custom storefront experiences. Known for headless commerce work and mobile-first design, with integration experience across ERP, CRM, WMS, and 3PL systems. Worth comparing if brand presentation is paramount.
3. Barrel — CPG & Subscription
A good fit for consumer packaged goods and subscription brands. Their work tends to center on retention, omnichannel commerce, and the connection between online and retail. Consider them if subscription experience and lifecycle marketing are core to your model.
4. BlueSwitch — B2B
One of the longer-running Shopify Plus partners, especially relevant for B2B requirements — complex pricing, multi-user accounts, custom catalogs, and replatforming. Worth a look for wholesale, distributor, or account-based purchasing models.
5. Diff Agency — Enterprise Engineering
A technical option for enterprise merchants who need deeper engineering, custom integrations, and data work rather than a simple storefront build. A fit for larger organizations with heavier technical and omnichannel requirements.
6. Eastside Co — Global Meets Local
An international agency with a New York presence, spanning Shopify builds, migrations, and ongoing marketing. Useful for brands entering the US market or expanding abroad that want development and growth support under one roof.
7. Roswell NYC — CLV-Focused Growth
Built around customer lifetime value and premium positioning, with work spanning design, development, and growth. Especially relevant for beauty, fashion, wellness, luxury, jewelry, and CPG brands that want a partner focused on the business, not just the site.
8. Acadaca — Hybrid Resourcing
A contender for merchants who want enterprise-level capability with a hybrid resourcing model, plus ongoing website management and accessibility support. Serves fashion, food and drink, health and beauty, and lifestyle brands that need post-launch support.
9. Omnycode — Data-Driven
A data-oriented option for merchants who need analytics, system integrations, and rapid launches. Positions itself as a digital-change consultancy rather than a development-only shop — a fit when operational insight needs to be built into the project.
10. Charle Agency — Headless & International
A newer-generation agency with strengths in headless commerce, internationalization, QA, and DevOps, plus B2B/B2C hybrid models. Worth reviewing for global expansion, localization, and more complex storefront architecture.
How to choose the right Shopify Plus agency in NYC
Choosing a partner comes down to fit, not just capability. Four things to weigh:
Migration track record. Look for proven migrations from your current platform — Magento, WooCommerce, Salesforce Commerce Cloud, or custom. Data migration, URL preservation, and SEO retention are where inexperienced teams cause damage.
UX and conversion strength. Some agencies excel at luxury presentation, others at conversion for high-volume retail. Make sure their portfolio matches your brand and your goals.
Industry fit. Fashion, B2B, and subscription brands have different needs. A partner who knows your category moves faster and makes fewer expensive mistakes.
Support model. Some hand off a finished store; others stay on to optimize and grow it. Match that to your internal team — if you don’t have in-house e-commerce depth, ongoing support usually pays for itself.
What a Shopify Plus agency in NYC cost
Pricing varies by scope and engagement model:
- Project-based: roughly $50,000–$200,000+ for a full Shopify Plus build or migration, depending on customization and integrations. Predictable cost; limited ongoing optimization.
- Retainer: roughly $5,000–$25,000+ per month for dedicated team time, continuous optimization, and priority support.
- Hybrid: a project build followed by an optimization retainer — common for brands that scale after launch.
- Sprint-based: fixed two-week deliverables, useful when needs vary month to month.
Integration and migration essentials
Strong Shopify Plus work depends on clean integration with your existing systems. ERP connectors (NetSuite, SAP, Microsoft Dynamics) keep inventory, pricing, and orders in sync. CRM integration (Salesforce, HubSpot) keeps customer data consistent for marketing. 3PL integration (ShipBob, FBA, or your WMS) matters as order volume scales. And any migration from Magento, WooCommerce, or Salesforce Commerce Cloud requires careful 301 redirects, URL structure planning, and a zero-downtime transition to protect SEO value and customer data.
FAQ
How long does a Shopify Plus migration take? Most migrations run 12–16 weeks. A simpler store with few customizations can be 8–10 weeks; an enterprise build with heavy integrations and complex data can run 20–24 weeks or more. At Blackbelt Commerce, we keep your current store live while we build the new one, so you don’t lose sales during the transition.
Which industries benefit most from a NYC agency? Fashion, beauty, and luxury have a natural edge in New York given the concentration of those brands here. But the bigger factor is category fit. We work across DTC and B2B — apparel, beauty, CPG, home, pets, and wholesale — and the agencies above each have their own specialties, listed with each entry.
Do I need a retainer after launch? It depends on your team. If you don’t have dedicated e-commerce expertise in-house, an ongoing partnership usually outperforms going it alone — CRO, performance monitoring, SEO, and steady improvement. If you have a strong internal team, project-based work for specific initiatives may be enough. Our retainers are built around growth after launch, not just maintenance.
The bottom line
There are excellent Shopify Plus agencies in New York, and the right one depends on your category and your goals. But if you want a single team to handle the build and the growth — migration, development, CRO, and AI-era SEO, with the founder on your calls instead of a sales rep — that’s where we lead.
If you’re planning a migration or trying to get more out of an existing Shopify Plus store, book a free growth audit. You’ll leave with three specific things to fix, whether you hire us or not.
