E-commerce breaks down into several distinct types based on who is selling to whom. The most common framework sorts e-commerce by the parties on each side of the transaction: businesses, consumers, and governments. Beyond these core models, newer categories have emerged based on how and where the transaction happens, such as mobile commerce and social commerce.
Business-to-Business (B2B)
B2B e-commerce involves transactions between two businesses. A manufacturer ordering raw materials from a supplier through an online portal, a software company selling licenses to another firm, or a wholesaler fulfilling orders from retailers all fall under this umbrella. These transactions tend to involve larger order values, longer sales cycles, and negotiated pricing rather than fixed sticker prices.
B2B is by far the largest segment of e-commerce by dollar volume. It accounts for roughly 80% of all e-commerce transaction value, and the global B2B e-commerce market is projected to reach $36 trillion by 2026, growing at a 14.5% compound annual growth rate according to the International Trade Administration. That massive size makes sense when you consider that a single business might place thousands of orders a year with dozens of vendors, each worth far more than a typical consumer purchase.
Business-to-Consumer (B2C)
B2C is what most people picture when they hear “e-commerce.” A company sells products or services directly to individual shoppers. Online retailers, streaming services, food delivery apps, and travel booking sites all operate in B2C. The defining feature is that one side is a business and the other is an individual buying for personal use.
B2C e-commerce covers the full range of marketing and fulfillment activities: product discovery, promotions, payment processing, shipping, and after-sale support. One of its key advantages is that businesses can interact with customers around the clock, without the constraints of store hours or physical locations. Competition in B2C is fierce, which has pushed companies to invest heavily in fast shipping, personalized recommendations, and seamless checkout experiences.
Consumer-to-Consumer (C2C)
C2C e-commerce happens when individuals sell to other individuals, typically through a platform that facilitates the transaction. Online auction sites, peer-to-peer marketplaces for used goods, and resale platforms for clothing or electronics are classic C2C examples. The platform usually handles payment processing and provides some level of buyer or seller protection, which adds a layer of trust that wouldn’t exist if two strangers simply exchanged money on their own.
E-commerce technology is what makes C2C viable at scale. Without it, you’d be limited to selling within your local area. With it, you can find buyers anywhere in the world. Payment intermediaries that hold funds until both parties are satisfied have become a standard feature of C2C platforms, reducing the risk of fraud for both sides.
Consumer-to-Business (C2B)
C2B flips the traditional model. Instead of a business offering products to consumers, individuals offer something of value to businesses. Freelance marketplaces where independent workers bid on company projects are one common example. Stock photography sites where individual photographers sell images to businesses are another. Influencer marketing, where individuals with an audience offer promotional services to brands, also fits this category.
The C2B model has grown significantly alongside the gig economy and the creator economy. Platforms that connect freelancers with companies have made it easy for businesses to tap into specialized talent without hiring full-time employees, and for individuals to monetize skills or content on their own terms.
Direct-to-Consumer (D2C)
D2C is a variation of B2C where a brand manufactures its own products and sells them directly to customers, cutting out retailers, wholesalers, and other middlemen. Instead of placing products on store shelves or selling through a large marketplace, D2C brands typically sell through their own websites and manage the entire process from production to delivery.
The trade-off is straightforward. D2C brands keep higher margins because there’s no retailer taking a cut, and they build direct relationships with customers, collecting feedback and purchase data firsthand. The downside is that they’re responsible for everything: manufacturing, marketing, warehousing, shipping, and customer service. Many well-known brands in categories like mattresses, eyewear, and skincare built their businesses on this model.
Business-to-Government (B2G)
B2G e-commerce covers transactions where businesses sell goods or services to government agencies at the local, state, or national level. This includes everything from office supplies and IT infrastructure to consulting services and defense equipment. Government procurement typically involves formal bidding processes, strict compliance requirements, and detailed contracts, which makes B2G fundamentally different from selling to private-sector customers.
Many governments now use online procurement portals where vendors can find open contracts, submit bids, and manage orders digitally. Success in B2G often depends less on marketing and more on meeting regulatory standards, demonstrating reliability, and navigating bureaucratic processes.
Mobile Commerce (M-Commerce)
Mobile commerce refers to any e-commerce transaction conducted through a smartphone or tablet. Rather than defining who is buying from whom, m-commerce describes the channel through which the purchase happens. It cuts across all the models above: you might buy shoes from a retailer (B2C), sell a used bike to another person (C2C), or place a wholesale order from a supplier (B2B), all from your phone.
M-commerce has become the dominant way consumers shop online in many markets. Mobile-optimized websites, dedicated shopping apps, and mobile payment systems like digital wallets have made buying from a phone as seamless as buying from a desktop. For businesses, this means that a clunky mobile experience can cost real sales.
Social Commerce
Social commerce is e-commerce that takes place within social media platforms. Instead of browsing a separate website, shoppers discover and purchase products directly inside apps they’re already using to scroll through posts, watch videos, or message friends. The key distinction is that social interactions, such as reviews, recommendations, and influencer content, are baked into the shopping experience rather than bolted on afterward.
Researchers describe social commerce as the intersection of three things: technology infrastructure, social interaction, and commercial activity. In practice, this looks like shoppable posts, in-app checkout features, and livestream shopping events where a host demonstrates products in real time while viewers buy with a few taps. Social commerce blurs the line between entertainment and shopping, which is exactly why platforms have invested so heavily in it.
Quick Commerce (Q-Commerce)
Quick commerce focuses on ultrafast delivery, typically promising to get orders to your door within 10 to 30 minutes. It’s most common for groceries, convenience items, and prepared food. Q-commerce companies operate networks of small, strategically located fulfillment centers (sometimes called “dark stores”) rather than shipping from large, centralized warehouses.
The model depends on keeping a curated inventory of high-demand items close to customers. That limits the product selection compared to a traditional online retailer, but for the items it does carry, the speed is the selling point. Q-commerce has gained traction in dense urban areas where the logistics of rapid delivery are more feasible.
Subscription Commerce
Subscription commerce is built around recurring payments rather than one-time purchases. Customers sign up and receive products or access to services on a regular schedule, whether that’s monthly deliveries of meal kits, weekly curated boxes, or ongoing access to software and streaming content. The model creates predictable revenue for businesses and convenience for customers who don’t want to reorder the same things repeatedly.
There are generally three flavors. Replenishment subscriptions automatically resend consumable products you use regularly, like razors or pet food. Curation subscriptions surprise you with a selection of items chosen by the company. Access subscriptions give you ongoing use of a digital product or members-only pricing. Many e-commerce businesses now blend subscription options with traditional one-time purchasing to capture both types of customers.