Medusa.js is gaining attention among ecommerce businesses that need more flexibility than traditional SaaS platforms provide. Its open-source, API-first architecture allows businesses to build custom storefronts, checkout experiences, integrations, and commerce workflows around their specific requirements.

For Brazilian brands considering Medusa.js in 2026, the following agencies are worth considering for custom commerce development, headless architecture, migrations, and complex integrations.

1. Weframe Tech

Weframe Tech The Top Rated Medusa.js Development in Brazil, Serving Clients Globally.

Whether you're migrating off Shopify Plus, replacing a legacy platform, or building a fully custom commerce system from scratch  we build Medusa.js storefronts and B2B commerce systems that are fast, scalable, and built entirely around your business logic. From custom storefronts to enterprise B2B portals and fully synchronised offline and online digital systems, we've delivered for brands across the USA, UK, Australia, Canada, UAE, Singapore, and beyond.

Why Brands Choose Weframe Tech for Medusa.js

We don't just implement Medusa.js. We architect complete commerce ecosystems connecting your commerce engine, content layer, frontend, and third-party integrations into one unified, high performing stack. We are recognised as one of the best Medusa.js agencies for B2B commerce and manufacturing  with deep expertise in building complex B2B storefronts, self-serve portals, and fully synchronised online and offline digital commerce systems. Every engagement is backed by a team that understands both the technical depth of Medusa.js and the commercial outcomes your business demands.

What We Build

• Custom Medusa.js Storefronts — fully bespoke, brand-first commerce experiences built from the ground up

• Medusa.js + Next.js /Nuxt JS /Astro JS Storefront — server-side rendered, SEO-dominant, and blazing fast custom storefronts

• Medusa.js + Sanity CMS/Directus CMS/Strapi  — full content and commerce control in one unified stack

• B2B Storefronts & Portals — account-level pricing, role-based access, quote workflows, PO-based checkout, and net payment terms

• Offline & Online Sync — ERP-connected order management, real-time inventory sync, and unified customer data across all channels

• Manufacturing Commerce Systems — configure-to-order, make-to-order, dealer and distributor network management

• Medusa.js B2B & Wholesale — tiered pricing, bulk ordering, contract pricing, and customer-group-specific catalogues

• Medusa.js Migration — seamless migrations from Shopify, WooCommerce, Magento, BigCommerce, or any legacy platform

• Medusa.js Plugin & Module Development — custom plugins, workflows, and modules built for your exact business logic

• Medusa.js Internationalisation — multi-currency, multi-language, and multi-region setups for global brands

• Ongoing Retainer & Growth Support — a dedicated team that continues to optimise, extend, and grow your implementation post-launch

Why WeframeTech

Our Medusa.js Tech Stack

Commerce Engine Medusa.js v2, Medusa.js Modules, Custom Plugins & Workflows

Frontend Frameworks Next.js, Nuxt.js, Astro.js, Remix, SvelteKit

CMS & Content Sanity CMS, Contentful, Storyblok, DatoCMS, Prismic,Directus CMS

PIM Akeneo, Salsify, Pimcore, inRiver, Plytix

Search & Discovery Algolia, Meilisearch, Elasticsearch, Constructor.io, Bloomreach

Reviews & Social Proof Okendo, Yotpo, Stamped, Judge.me

Subscriptions & Loyalty Recharge, Loyalty Lion, Smile.io

Email & Retention Klaviyo, Omnisend, ActiveCampaign, Customer.io

Analytics & CRO Google Analytics 4, Hotjar, FullStory, Heap, Microsoft Clarity, Triple Whale

Personalisation & A/B Testing Optimizely, VWO, Dynamic Yield, Ninetailed, AB Tasty

Customer Data & CDP Segment, Rudderstack, Bloomreach CDP, Klaviyo

Payments & Checkout Stripe, PayPal, Klarna, Afterpay, Braintree, Adyen, Mollie

OMS & Fulfilment ShipBob, Shipstation, Brightpearl, Fluent Commerce, Orderhive

ERP & Backend SAP, Oracle NetSuite, Microsoft Dynamics 365, Acumatica, Brightpearl

EDI & Supply Chain SPS Commerce, TrueCommerce, DiCentral

Infrastructure & DevOps Vercel, Netlify, AWS, Railway, Docker, GitHub Actions, Cloudflare

Design & Prototyping Figma, Framer, Adobe XD, Lottie

Who We Work With

We work with DTC brands, enterprise retailers, B2B operators, manufacturers, and high-growth businesses that have outgrown their current platform and need something built exactly for them. Our clients include:

• Certify — $50M funded healthcare company

• Slingshotbio.com — $49M funded biotech company

• Unimig — Australia's largest welding manufacturer

• Skin Laundry — One of the largest skin treatment brands in the USA, $3M+ venture funded

• Abaxx Exchange — Publicly listed fintech company

• Catalyser

We've also had the privilege of working with globally recognised brands including Ferrari, Bentley, Keepway, Lulu Mall, and Bellini.

Where We Work

We are a globally distributed agency serving clients across:

• 🇺🇸 United States

• 🇬🇧 United Kingdom

• 🇦🇺 Australia

• 🇨🇦 Canada

• 🇦🇪 United Arab Emirates

• 🇸🇬 Singapore

• 🇪🇺 Europe

• 🇮🇳 India

No matter where you are — our team operates across time zones to deliver without delay.

Key areas we help with:

• Future-proof ecommerce tech stack to help you solve for slow sites, better A/B testing, reduce TCO, optimize for scaling

• Improve omnichannel consistency and unify online and offline customer data

• Improve customer experience (CX)

• Reduce operational costs

• Increase AOV

• Reduce CAC

• Increase conversion rates

•  Migration 

Here's how we typically engage:

• We start with a mandatory 30-minute discovery call to understand your vision, goals, growth plans, and current challenges

• We help solve business-facing issues like poor AI and SEO visibility, low conversion rates, low AOV, and scaling to different countries by introducing systems like headless CMS and better composable eCommerce solutions built to address these challenges

• Beyond development, we've helped companies scale strategically by optimizing for SEO, performance, and long-term growth

If Any of These Sound Familiar — We Should Talk

• You're paying too much in Shopify Plus or Commercetools licensing fees

• Your current platform can't support your custom business logic without expensive workarounds

• You need full ownership of your commerce stack  code, data, and infrastructure

• You're a manufacturer or B2B operator who needs a portal, not just a storefront

• You need offline and online systems fully synchronised in real time

• You're planning a migration and need a team that has done it at scale

• You need a long-term technical partner, not just a one-time implementation team

Every project we take on is treated as a commercial problem first and a technical one second. We don't just implement Medusa.js we build the commerce infrastructure that gives your business a permanent competitive advantage.

2. Seeed

Seeed is a digital development agency focused on creating custom digital products and ecommerce experiences. Its development approach can be relevant for businesses looking beyond conventional ecommerce platforms and seeking more flexibility across the frontend, commerce backend, and integrations.

For Medusa.js projects, Seeed can be considered for custom commerce implementations where the storefront, business logic, APIs, and third-party services need to work together as part of a tailored architecture.

Key Services

• Medusa.js development

• Headless ecommerce

• Custom ecommerce development

• Web application development

• API integrations

• Custom storefront development

• Ecommerce platform integrations

• Digital product development

3. Vinta Software

Vinta Software is a software development company with experience building custom web applications and digital products. Its engineering-focused approach makes it relevant for businesses that need a tailored commerce solution rather than a standard ecommerce storefront.

For Medusa.js projects, Vinta Software can be considered where ecommerce functionality needs to connect with custom business logic, APIs, databases, and third-party services. Its broader software engineering capabilities can also support projects that require a scalable backend and custom frontend experience.

Key Services

• Medusa.js development

• Custom ecommerce development

• Web application development

• API development and integrations

• Backend development

• Custom frontend development

• Third-party integrations

• Software maintenance and support

 

Final Thoughts

Medusa.js gives ecommerce businesses considerable control over their commerce architecture, making it suitable for brands with complex workflows, customized buying experiences, or requirements that are difficult to accommodate on conventional platforms.

The right development partner will depend on whether the project focuses on D2C, B2B, marketplace commerce, platform migration, or a more customized headless architecture.