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Shopify Platinum Partner
Top-tier status earned by shipping for top-tier merchants. Headless, OS 2.0, Plus, B2B and Markets.
Shopify Plus Agency in Los Angeles / OC
Los Angeles runs on brand. From streetwear to beauty to CPG, the brands that define culture are built here and they demand a Shopify partner that can keep pace. SeedCMS is one of only 13 Shopify Plus Platinum Partners in the US, with offices in California and London and a 28+ person in-house team. We've shipped for KITH, Stussy, Kate Somerville, Anastasia Beverly Hills, and Orgain brands that are household names across LA and beyond. Whether you're migrating off Magento, scaling a DTC operation, or need a senior retained team, we've done it at your scale.
Platinum-tier Shopify development for LA's most ambitious brands.
15 years of experience across Consumer Goods, Apparel, Beauty, and Entertainment from cult DTC to global enterprise.
Built tooutrunbigger agencies.
A senior team across two cities, deep in Shopify and AI, working at startup speed without sacrificing the rigor enterprise clients expect.
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Leading AI integration agency
Production-grade AI for commerce: personalization, support agents, copilots, predictive segments.
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Lean and fast
A small senior team no juniors fronting your account. Discovery to launch in weeks, not quarters.
04
Two continents
16 hours of production per day. Offices in California and London cover your full workday from morning standup to last-light Slack.
What we ship.
Six practices, deployed by senior in-house teams in California and London. Every engagement combines the right mix.
Platform Migrations
Replatforming done right is a competitive advantage. Done wrong, it's a costly setback. Since 2018, Seed CMS has completed over 110 migrations to Shopify Plus a depth of experience no checklist can replicate. We migrate brands from Magento, Salesforce Commerce Cloud, WooCommerce, and BigCommerce, handling data mapping, redirect strategy, integration re-architecture, theme build, and go-live cutover. Our phased approach minimizes downtime, protects your SEO equity, and delivers a fully operational store from day one.
Development
For brands that have outgrown theme templates, our Shopify Theme Development practice delivers fully custom storefront builds engineered for performance, flexibility, and brand fidelity. We work exclusively in Online Store 2.0 building modular, merchant-editable sections that give your team full control without compromising design integrity. Our Liquid developers write clean, maintainable code with performance baked in: optimized asset delivery, minimal JavaScript overhead, and Core Web Vitals scores that support your SEO and paid media investment.
CRO Services
For Shopify Plus brands investing in traffic, small gains in conversion rate translate directly to significant revenue growth. We start with a full-funnel audit analyzing your analytics, session recordings, heatmaps, and checkout data to surface the friction costing you conversions. From there, we build a prioritized roadmap and run structured A/B and multivariate tests to validate improvements before they go permanent. Everything we do is measured, documented, and designed to compound.
Custom Apps
Every high-volume Shopify Plus store eventually hits a ceiling with off-the-shelf apps. We design and build private Shopify apps, custom API integrations, and backend systems that fit your business exactly. Our team works with the Shopify Admin API, Storefront API, Shopify Functions, and Checkout Extensibility to extend your store's capabilities without compromising platform stability. Common engagements include ERP and 3PL integrations, custom pricing and discount logic, and bespoke loyalty systems all built to Shopify's API versioning standards and designed for long-term maintainability.
UI/UX Design
Your storefront is your most powerful sales channel and first impressions are everything. Our UX & Interface Design team brings together brand strategy, user research, and interface craft to design Shopify experiences that convert without compromising on aesthetics. Every project starts with understanding your customer journey, then progresses through wireframes, design systems, and high-fidelity mockups that give developers a precise blueprint and your customers a seamless path to purchase.
Ongoing Support
The most successful Shopify Plus brands treat their storefront as a product one that requires a consistent, trusted technical team to evolve alongside the business. As your retained partner, we embed into your operation, learning your stack, integrations, and commercial priorities. Monthly retainer hours flex across new feature development, platform updates, A/B testing, performance monitoring, and rapid issue response. No account handoffs, no re-briefing just a senior team that's as invested in your store's performance as you are.
Selected work.
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07
Kith
Luxury Streetwear Icon
10+ YrsPartnership
CustomDevelopment
CustomMiddleware
Stussy
Streetwear Fashion Mainstay
MigrationAdobe to Shopify
CustomDevelopment
6+ YearsPartnership
Orgain
Full Support For A Nutrition Staple
MigrationAdobe to Shopify
CustomDesign + Development
CROOngoing Services
Kate Somerville
A skincare icon, replatformed in 30 days.
MigrationSFCC to Shopify
CustomDevelopment
CROOngoing Services
Golf Wang
From Album Drops to Converse Releases
MigrationBig Comm to Shopify
CustomDevelopment
6+ YearsPartnership
Design Essentials
From B2B to D2C, we covered it.
MigrationBig Comm to Shopify
CustomDevelopment
CustomApp Development
Anastasia Beverly Hills
Large Scale SFCC Migration
MigrationSFCC to Shopify
CustomDevelopment
CustomApps
Trusted Partners.
Seedcms uses the following platforms across our builds we trust what they do and we're subject-matter experts in implementation and execution.
Let's build
Tell us where you want commerce to go.
30-minute intro call. No deck, no sales theater just senior people, your roadmap, and an honest answer on whether we're the right fit.
Book an intro callCommon questions.
Is SeedCMS based in Los Angeles?
Our California studio is based in Orange County, about 45 minutes south of LA. We work with brands across the greater Los Angeles area — from Venice to Beverly Hills to Downtown and regularly meet clients in person. Our London office means we also cover your full workday across time zones.
What types of LA brands do you work with?
Our LA client base spans streetwear, apparel, beauty, CPG, and entertainment. We've worked with brands including Stussy, Kate Somerville, Orgain, Golf Wang, and Madhappy brands that are culturally significant in LA and require Shopify Plus builds that reflect that
What makes SeedCMS different from other Shopify agencies in Los Angeles?
We're one of only 13 Shopify Plus Platinum Partners in the US the highest tier Shopify awards. Most LA agencies are Plus or Premier tier at best. Platinum status means we've shipped consistent, high-volume work for enterprise merchants and are held to a higher standard by Shopify directly.
Can you migrate our existing store to Shopify Plus?
Yes migrations are one of our core specialties. Since 2018 we've completed over 110 migrations to Shopify Plus from Magento, Salesforce Commerce Cloud, WooCommerce, and BigCommerce. We handle data migration, redirect strategy, SEO equity preservation, integration re-architecture, and go-live cutover end to end.
Do you work with LA brands on an ongoing basis, or only project work?
Both. Many of our longest client relationships some over a decade are ongoing retained partnerships where we act as the brand's embedded Shopify technical team. We handle new feature development, platform updates, A/B testing, performance monitoring, and rapid issue response on a monthly retainer basis.
How do we get started?
A 30-minute intro call no deck, no sales theater. We'll ask about your stack, your roadmap, and your timeline, and give you an honest answer on whether we're the right fit. Book directly at seedcms.com/pages/contact.