Open Source TypeScript eCommerce Software

Svelte Commerce is an open-source storefront framework built with SvelteKit that enables developers to create fast, modern eCommerce frontends using a headless architecture. The platform functions as a progressive web application storefront that can connect to various backend commerce systems through APIs. Because it is headless, the frontend can integrate with different eCommerce engines such as Medusa, Litekart, or other REST-based platforms. The project includes many core commerce features such as product browsing, shopping carts, checkout flows, authentication, and search capabilities. Built with a modern JavaScript stack, it emphasizes performance and responsiveness by leveraging Svelte’s reactive architecture and server-side rendering capabilities. Developers can deploy the project as a standalone storefront or customize it extensively to match their own eCommerce infrastructure.

Medusa is an open‑source, modular commerce platform that provides foundational commerce logic and tools—like product management, orders, payment flows—as a framework. It's designed for developers to build custom, scalable e‑commerce applications such as B2B, DTC stores, marketplaces, point-of-sale systems, and service businesses without reinventing core functionality. Medusa is a commerce platform with a built-in framework for customization that allows you to build custom commerce applications without reinventing core commerce logic. The framework and modules can be used to support advanced B2B or DTC commerce stores, marketplaces, distributor platforms, PoS systems, service businesses, or similar solutions that need foundational commerce primitives. All commerce modules are open-source and freely available on npm.

Shape the merchant experience for Shopify’s core product, the admin. Fundamental design guidance for creating quality admin experiences. Reusable elements and styles, packaged through code, for building admin interfaces. Coded names that represent design decisions for color, spacing, typography, and more. Over 400 carefully designed icons focused on commerce and entrepreneurship. The shopify/polaris repository is an intergalactic monorepo made up of NPM packages, VSCode extensions, and websites. Run commands across all workspaces.

It is a plug-and-play frontend application for AviaCommerce API built using Angular(7), Redux, Observables & ImmutableJs. It is not limited to via commerce and can also be used with any e-commerce solution with an API interface. Such as spree commerce, Magento, open-cart, etc. AviaCommerce is, and will always be open source. We believe that collaboration is a key ingredient for developing a stellar project. The open source community has played a key role in the software development industry ecosystem, promoting open collaboration and often maintaining a very low tolerance for compromise. AviaCommerce is written in Elixir and Phoenix framework. Thus, leveraging all the benefits of the battle-tested Erlang runtime, chiefly: high availability and massive scalability which results in blazing fast response times. According to the DB-Engines ranking, Elasticsearch is the most popular enterprise search engine.

Next.js Starter Medusa is an open-source starter template designed to help developers quickly build modern eCommerce storefronts using the Medusa headless commerce engine and the Next.js framework. The project provides a complete frontend architecture that connects to a Medusa backend, which handles core commerce logic such as products, carts, customers, and orders. By combining Medusa’s modular commerce APIs with the capabilities of Next.js, the template enables developers to build fast, scalable storefront applications while maintaining full flexibility over design and functionality. The template includes a preconfigured setup with technologies such as TypeScript and Tailwind CSS, allowing developers to customize styling and user experience while retaining a production-ready foundation. It also takes advantage of the latest Next.js features such as the App Router, server components, and modern data-fetching mechanisms to improve performance and maintainability.

Universal Commerce Protocol (UCP) is an open standard designed to unify how platforms, businesses, and payment providers interact across the modern commerce ecosystem. It provides a common language that eliminates fragmented, custom integrations and enables seamless interoperability between diverse commerce systems. Built for an increasingly agentic web, UCP supports AI-driven platforms that can discover products, manage carts, and complete transactions securely on a user’s behalf. Its modular, capability-based architecture allows businesses to expose only what they support while remaining flexible and extensible. By leveraging existing industry standards for payments, identity, and security, UCP avoids reinventing the wheel while ensuring reliability and trust. The result is a developer-friendly, future-ready protocol that simplifies commerce integration at global scale.

The Brill Framework allows React web applications to be built quickly using a "Low Code" approach. A Content Management System (CMS) supports editing of pages containing React components. The React components communicate with each other and the Server using a middleware that's based on WebSockets. With a "No Code" solution, there's always something you require that's not support. You spend ages bending the product to your requirements or pay the supplier to provide the components you need. The alternative is a "Full Code" solution using React. This involves a lot of coding and it's not always easy to update content without doing a release. There's the option of using a Headless CMS for the content and but that only increases the amount code required. The Brill Framework provides the best of both worlds. Quick building of the application using a CMS and a set of ready made components, with the ability to add your own React components and server side functionality.

Our design system helps us work together to build a great experience for all of Shopify’s merchants. Downloads, links, and third-party tools to help you and your teams learn, draft, design, and build products for Shopify. Use the API to build Figma plugins, text editor extensions, or even a completely new site. While we do offer a CSS-only version, we strongly recommend using the React versions of our components. It’s the version that we use at Shopify. It allows for rich, complex components like Tabs and Popovers, and will not have as many breaking changes as the CSS-only version. If React doesn’t make sense for your application, you can use a CSS-only version of our components. This includes all the styles you need for every component in the library, but you’ll be responsible for writing the correct markup and updating classes and DOM attributes in response to user events.

Stackpeek is a free, open-source browser extension that shows what any Shopify storefront is built on. Click its icon and a side panel names the theme -- with its version, creator and price -- the apps behind the store, grouped by the job they do, and the advertising and analytics pixels the page loads, each named rather than counted as a total. It also exports the store's public product catalogue to CSV in Shopify's own product-import format: every public product and variant, up to the first 10,000, assembled in your browser. Detection is reported honestly. Weak app matches are marked unverified rather than dropped, unknown hosts are counted so gaps stay visible, and a customized, bespoke or headless build is labelled as such instead of being guessed at. Four permissions, no account, no sign-up, and your browsing history is not collected. The full source is MIT licensed and published, so every claim here is checkable against the code. Not affiliated with Shopify Inc.

First and foremost, this service will not automatically buy for you. Runs 24/7, 365, looking for the items you want. Ability to add to cart when available and even opens the browser for you. When you're not by your computer, worry-free with notifications to most platforms and devices when an item comes in stock. You'll find most of the content on the left sidebar. The right sidebar will help you navigate a page. You do not need any computer skills, smarts, or anything of that nature. You are very capable as you have made it this far. Some basic understanding how a terminal, git, and or Node.js is a bonus, but that does not limit you to getting streetmerchant running! There is a lot of undefined behavior with using streetmerchant in the cloud. Some sites may block IPs from your cloud provider. It is possible that a VPN will help circumvent these problems.