Shopify Plus Agency · USA
The Shopify Plus agency for brands that outgrew their stack
A full-service Shopify Plus ecommerce agency: checkout extensibility, Shopify Functions, B2B + DTC from one instance, Magento migrations, and ERP integration. Not on Plus yet? We'll tell you honestly whether you need it.
- Shopify Plus Partner · direct line to launch engineers
- Checkout extensibility + Shopify Functions shipped in production
- Pay-on-results growth model after launch

Trusted by 50+ D2C brands · Google, Meta & Shopify partners












A Shopify Plus ecommerce agency that ships the hard parts
San Francisco, USA
In-house team
Conversion is a full-service Shopify Plus ecommerce agency headquartered in San Francisco. We're a Shopify Plus Partner, building enterprise storefronts for DTC and B2B brands across the US, Canada, UK, and Australia. Our Shopify Plus development team covers checkout extensibility, Shopify Functions, and multi-store international expansion. We build Shopify B2B and wholesale catalogs on the same instance as DTC, and run migrations to Shopify Plus from Magento, Salesforce Commerce Cloud, and WooCommerce.
Plenty of agencies sell 'Shopify Plus services' and have never shipped a Checkout UI Extension or a delivery-customization Function. We build the parts of Plus that justify its price tag: the checkout, the automation layer, and the B2B engine. Every build ships with an experimentation harness and a 90-day optimization roadmap. If you're still weighing the upgrade, our Shopify Plus pricing guide breaks down platform fees and build costs, and a Shopify Plus consultant can advise before you commit to a build. We also build headless Shopify Plus on Hydrogen, recommended only when a theme build can't deliver the experience.
Most agencies sell Plus. Few can build it.
We regularly inherit stalled Plus projects. The failure patterns are consistent, and avoidable.
Plus features left on the shelf
Brands pay for Plus and use it like standard Shopify: no checkout extensibility, no Functions, no Flow automations, no B2B catalogs. You're paying an enterprise license for a theme install. We build the features that justify the tier.
Checkout treated as untouchable
The checkout is where money is won or lost, and most agencies won't touch it. Checkout UI Extensions, Branding API, and Functions let us add upsells, trust content, custom fields, and bespoke discount logic, measured with A/B tests.
B2B bolted on with apps
Wholesale run through duct-taped apps and duplicate stores creates catalog drift and support chaos. Plus-native B2B (company accounts, price lists, net terms, quote-to-order) runs both channels from one instance with one source of truth.
There's a reason why people rave about us
Real recommendations from founders, managers, and teammates our founder has worked with over 12+ years in performance marketing.
Tarun is a brilliant professional. If you want to invest in online advertising, you can trust his work with your eyes closed. He has done an amazing and high quality job on our ad accounts. It has been a pleasure to work with and learn from him.

I rarely come across real talents who stand out like Tarun. I had the pleasure of working with Tarun for three years at GroupM, collaborating on several project teams. Tarun's ability to handle multiple projects was unlike any I've seen before and made a dramatic increase in the productivity level of our company. No matter how tense a meeting, Tarun made sure everyone left with a smile. As a team member or a leader, Tarun earns my highest recommendation.

Tarun is simply amazing at social media marketing. He single-handedly managed big accounts and gave amazing insights due to which he was able to earn appreciation from his clients.

Tarun has the best domain knowledge and is a true professional. I am glad we got connected. I highly recommend him.

Tarun lives and dies with Facebook and Twitter. He thinks in a different way than other strategists I know and that makes him a special professional. The kind of results he has given to his clients is simply awesome and unbelievable. I would say that he can easily compete with people with 6-7 years of experience in his domain and expertise.

Tarun is one of the smartest guys I know — because he works harder than anyone else, makes smart decisions, and is willing to take calculated risks from his forward-thinking mindset. I would recommend hiring Tarun for your business if you want it to reach the level of success you are striving for. His psychological knowledge & expertise from a business point of view drives the brand forward!

Tarun is an expert at driving the strategic visions and tactical execution of online marketing campaigns that drive demand for the business. Analytic and adept at collecting intelligence on channel effectiveness and other key metrics. Identifies marketplace trends and recommends strategy changes to improve conversions. Experienced in all leading market platforms.

Tarun was extremely helpful during the testing of one of our new social media tools here at Buffer. His deep knowledge of social ads best practices helped us nail down how we should approach this product. He proved just how much he knows about social media and I'm looking forward to working with him again.

I've known Tarun for a number of years and if there's one thing I know about him it's that once he sets his mind on something, he goes after it and keeps going until it gets done. Keep it up!

Everything the Plus tier can do, put to work
Full-service Shopify Plus development, from checkout extensibility to B2B to multi-store international expansion. We work in Liquid, TypeScript, React, Remix, and the full Plus API surface.
Checkout Extensibility
Custom checkout built on Checkout UI Extensions, the Branding API, and Shopify Functions. Upsells, trust content, custom fields, address validation, and delivery logic inside Shopify's checkout.
- Checkout UI Extensions
- Branding API design systems
- Post-purchase extensions
- A/B tested checkout upsells
Shopify Functions
Custom backend logic without apps: discount stacking rules, delivery and payment customization, cart validation, and B2B pricing engines, deployed as Functions with full CI/CD.
- Discount + promotion logic
- Delivery customization
- Payment customization
- Cart + checkout validation
B2B & Wholesale on Plus
Plus-native B2B: company accounts, customer-specific catalogs and price lists, quantity rules, net-terms payment, and quote-to-order workflows, running DTC and B2B from a single instance.
- Company accounts + locations
- Price lists + quantity rules
- Net terms + payment terms
- Quote-to-order workflows
Multi-Store & International
Expansion stores, Markets Pro, multi-currency, localized checkout, hreflang, and geo-routing. One brand, many markets, without catalog drift or SEO cannibalization.
- Up to 9 expansion stores
- Markets Pro + multi-currency
- hreflang + geo-routing
- Localized content + checkout
Migrations to Shopify Plus
Replatforming from Magento 1 & 2, Salesforce Commerce Cloud, WooCommerce, BigCommerce, and Shopware. Catalog, customer, and order history migration with zero-ranking-loss SEO preservation.
- Magento to Plus
- SFCC (Demandware) to Plus
- One-to-one 301 mapping
- 90-day GSC monitoring
ERP, PIM & 3PL Integration
NetSuite, SAP, Microsoft Dynamics, Akeneo, Salsify, ShipBob, and custom middleware. Real-time inventory, order sync, and financial reporting that survives an audit.
- NetSuite + SAP + Dynamics
- PIM (Akeneo, Salsify)
- 3PL + WMS integration
- Custom middleware (Node/TypeScript)
Flow & Launchpad Automation
Shopify Flow automations for fraud, tagging, inventory, and VIP workflows. Launchpad for scheduled drops, flash sales, and BFCM, tested and rehearsed before the traffic spike.
- Flow automation library
- Launchpad drop scheduling
- Fraud + risk workflows
- BFCM load rehearsal
Headless Shopify Plus (Hydrogen)
Hydrogen and Oxygen storefronts for brands that need fully custom front ends, content-heavy experiences, or composable commerce with Commerce Components. Recommended only when a theme build can't deliver it.
- Hydrogen + Oxygen builds
- Headless CMS integration
- Commerce Components
- Theme vs headless TCO review
Subscriptions, POS & Omnichannel
Subscription commerce, Shopify POS for retail, and unified inventory across DTC, wholesale, marketplaces, and stores, so every channel sells from one catalog.
- Subscription programs
- Shopify POS rollout
- Marketplace + retail sync
- ADA / WCAG accessibility
Performance & CRO on Plus
Core Web Vitals engineering at the theme level, experimentation harness setup, and a post-launch CRO roadmap run by our Shopify CRO team.
- Core Web Vitals greens
- A/B testing harness
- Post-launch CRO roadmap
- Pay-on-results growth option
What you get in the free audit
A free 30-minute call with the engineers who'd build your store, not a salesperson.
The Plus capabilities you're not using
Which Plus capabilities you're paying for and not using, and what each is worth in revenue.
Plus modeled against your current plan
Whether Plus pays for itself at your GMV. If standard Shopify is the better call, we'll say so.
Your migration path mapped
For Magento or SFCC replatforms, we map your catalog, integrations, and SEO risk on the call.
A fixed-scope quote within 48 hours
A fixed-price quote with a week-by-week roadmap, before you sign anything.
From scoping to launch in 12 to 20 weeks
- Step 01
Discovery & fixed-scope quote
30-minute discovery call, technical audit of your current stack, and a fixed-scope quote within 48 hours. You get a week-by-week roadmap before you sign anything.
- Step 02
Architecture & design
Data model, integration map, checkout extension plan, and conversion-led design. Every template is tied to a conversion hypothesis with a measurable lift target.
- Step 03
Build & integrate
Theme or headless build, Functions and checkout extensions, B2B configuration, ERP/PIM hookups, and migration dry runs, with weekly status calls and a shared sprint board.
- Step 04
Launch & compound
Zero-downtime cutover, 301 verification, 90-day Search Console monitoring, and a post-launch CRO program. Most clients move to pay-on-results growth from here.
Shopify vs Shopify Plus: is the upgrade worth it?
Shopify Plus starts at $2,300/month (3-year term) or $2,500/month (1-year term). Here's what that buys you over standard Shopify. Full numbers are in our Shopify Plus pricing guide.
Platform fee
- Shopify (Advanced)
- $399/mo
- Shopify Plus
- From $2,300/mo
Checkout extensibility (UI Extensions, Branding API)
- Shopify (Advanced)
- Limited
- Shopify Plus
- Yes
Shopify Functions (custom discounts, delivery, payments)
- Shopify (Advanced)
- Public apps only
- Shopify Plus
- Custom Functions
Native B2B (company accounts, price lists, net terms)
- Shopify (Advanced)
- No
- Shopify Plus
- Yes
Expansion stores
- Shopify (Advanced)
- No
- Shopify Plus
- Up to 9
Flow + Launchpad automation
- Shopify (Advanced)
- Flow only
- Shopify Plus
- Yes
API rate limits
- Shopify (Advanced)
- Standard
- Shopify Plus
- Higher
Best fit
- Shopify (Advanced)
- Under ~$1M GMV
- Shopify Plus
- $1M+ GMV, B2B, or international
The Plus partner brands switch to
Shopify Plus Partner
Direct access to Shopify's launch engineers, early access to Functions, checkout extensibility, and Commerce Components. Your build benefits from the roadmap before it ships publicly.
We build the hard parts
Checkout UI Extensions, Shopify Functions, B2B engines, ERP middleware. These are the features that justify the Plus license, and we ship them in production.
Fixed scope, week-by-week roadmap
A fixed-price quote within 48 hours of discovery, a published week-by-week roadmap on day one, and a weekly status call for the duration. No hourly-billing black holes.
Zero-loss migrations
Every replatform ships with one-to-one 301 mapping, structured data preservation, and 90-day Search Console monitoring. Zero ranking loss is the bar and the metric we report against.
Conversion-led builds
Every template ships tied to a conversion hypothesis. In-house designers, Liquid devs, React engineers, and CRO analysts in one room, with no subcontracting.
Pay-on-results after launch
Post-launch growth work runs on our pay-on-results model: fees track incremental revenue instead of a flat retainer.
Shopify Plus agency questions
What is Shopify Plus?
How much does Shopify Plus cost per month?
Shopify vs Shopify Plus: what's the difference, and is the upgrade worth it?
What is a Shopify Plus agency?
How much does a Shopify Plus development company charge?
What's the difference between Shopify Plus, Premier, and Platinum partners?
How do I choose between Shopify Plus agencies?
Can you migrate us to Shopify Plus from Magento, Salesforce Commerce Cloud, or WooCommerce, and how long does it take?
Do I need headless or Hydrogen on Shopify Plus?
Do you build B2B and wholesale on Shopify Plus?
What is checkout extensibility and why does it matter?
Retainer vs project vs pay-on-results: how do Shopify Plus agencies charge, and do you support stores after launch?
More ways we grow Shopify Plus brands
Shopify CRO Agency
Every Plus build ships with an experimentation harness, and the CRO team runs the post-launch testing roadmap on it.ExploreShopify Checkout Optimization
Checkout extensibility and Functions only pay back when the checkout changes are tested, which is this team's job.ExploreShopify Plus SEO Agency
Expansion stores and Markets need hreflang and migration SEO handled alongside the build.ExploreShopify SEO Agency
Technical SEO and collection page optimization keep organic traffic growing once the new store is live.ExploreShopify Plus PPC
Paid search for larger catalogs and multi-market stores depends on feeds and tracking the Plus build sets up.ExploreShopify Development Agency
If Plus isn't worth it for you yet, the same team builds on standard Shopify, ready to move up as you grow.ExploreShopify Plus Cost
What Plus costs in 2026: the monthly fee, variable fee, card rates, full TCO, and the GMV where Plus pays off.ExploreShopify Plus Consultant
Not sure Plus or a replatform is the right call? Independent advice on upgrades, architecture, and proposals, priced separately from any build.Explore
Put the Plus in your Shopify Plus
Book a free 30-minute scoping call with the engineers who'd build your store. We'll audit your current Plus setup or migration path and identify the unused capabilities worth the most revenue.
What happens next
- 1Pick a time for a 30-minute scoping call.
- 2Bring your current Plus setup or migration path: platform, catalog, and integrations.
- 3Get a fixed-scope quote within 48 hours, with a week-by-week roadmap.
Prefer email? tarun@conversion.is









