E-commerce
April 8, 2026
In practice, people sometimes use « doing e-commerce » and « selling on a marketplace » as synonyms. They are not exactly the same thing: e-commerce (electronic commerce) refers to the sale or purchase made through digital channels to place an order; a marketplace is a type of service that connects buyers and third-party sellers, with rules, commissions and often a platform operator in between.
A single brand can therefore do e-commerce on its own site and at the same time on one or more marketplaces: both channels are e-commerce, but responsibilities, customer relationship and profitability differ greatly. This guide clarifies the vocabulary, operational implications and regulatory watchpoints in the European Union, without confusing them with the general overview of how an e-commerce business works.
Definition reminder: the OECD and official statistics rely on the ordering method via electronic means to classify e-commerce; see OECD: definition of e-commerce (2025). For the European framework on digital services and platforms, the European Commission presents the Digital Services Act (DSA) and the rules related to online commerce in the EU: e-commerce rules in the EU.
We do not give a universal « marketplace vs own site » percentage: the breakdowns vary by sector, country and brand maturity. The goal is to name things correctly in order to manage margins, support and compliance.
On the Qstomy side: a chatbot can help on your online store or supplement support when you redirect to processes hosted by a third party; what matters is knowing who speaks to the customer and which data you feed. See the section on Shopify and conversational AI below.
From the buyer perspective, the « everything in one place » experience on a marketplace can feel like a classic website: search, cart, payment. From the seller perspective, the hidden cost is dependence on the platform's rules (rankings, account suspensions, pricing changes) and the commoditization that occurs when your product is compared side by side with equivalents.
Finance and marketing teams must share a channel map: for each SKU or family, full channel cost, average payment time, return rate, and contribution to brand awareness. Without this framework, we decide « marketplace yes / no » based on impressions or a single revenue figure.
Finally, the vocabulary matters for recruitment and partners: an « e-commerce manager » profile often expects site, acquisition and funnel expertise; a « marketplace » profile assumes mastery of one or more platforms' rules, internal advertising and service indicators. Mixing up the titles creates hiring disappointments.
Summary
Short answer: no, they are not synonyms
E-commerce is a broad category: selling online, regardless of the channel (owned website, app, certain B2B integrations, etc.). The marketplace is an intermediation model: a platform hosts multiple sellers and facilitates the transaction on its own terms.
Useful wording internally
You can say: “we do e-commerce on our D2C and e-commerce on marketplace X” rather than “we do marketplace” if what you mean is “we are present on a marketplace”.
Why the confusion is common
Large marketplaces are visible everywhere; the general public sometimes associates “buying online” with “buying on a multi-seller platform”. Professionals must separate channel and business model.
Simple analogy
E-commerce is “selling over the internet”; the marketplace is “selling in a digital shopping mall where the owner of the place sets the rules for access and takes a commission”. You can also open your own online store outside this mall: both are still e-commerce.
What this article does not do
It does not compare marketplace A to marketplace B (pricing, algorithms), nor does it recommend a single channel: it clarifies the terms to align teams and reporting.
What is meant by e-commerce?
E-commerce covers sales where the order is placed through a structured digital channel. This includes a Shopify store, a B2B configurator, and sometimes system-to-system flows, depending on the statistical definitions in use.
Proprietary online store
In principle, you control the design, the funnel, the first-party data, the displayed return policy, and the SEO content. See the e-commerce product catalog and e-commerce SEO on your domain; for conversion, the dedicated blog guides.
Classic no-stock-display e-commerce
Subscriptions, ticketing, services: still e-commerce if the order is online, even without a physical product.
Assisted and conversational selling
Chat, messaging, and guided journeys are part of modern e-commerce: they influence conversion, especially on the site you control (see the AI chatbot e-commerce article at the end of the guide).
B2B
Customer portals, vertical or horizontal B2B marketplaces: electronic orders may pass through EDI or via a web interface; the principle “online selling” remains the same from a macro perspective, with longer cycles and internal approvals.
Multi-channel
A company may combine online sales, a physical store, and a marketplace: each channel has its own inventory plan, its own profitability metrics, and its own partially dedicated team. The “all mixed together” dashboards hide margin leakage.
Product consistency
Product pages must remain aligned with the promises (compatibility, dimensions) regardless of the channel: returns for “not as described” are costly on every front.
What is meant by marketplace?
A marketplace provides an aggregated catalog from several sellers. The operator sets access, commission, and rating rules, sometimes logistics; sellers manage pricing, listings, and often shipping according to the chosen program.
Intermediation
The customer buys “on the platform” but the sales contract may legally be concluded with the third-party seller depending on the information displayed (to be validated with your lawyer). The platform often collects payment and remits it after commission.
Types of marketplaces
General-purpose, specialized (fashion, auto parts), local or global; B2C or B2B. Constraints and visibility are not interchangeable from one platform to another. For a textbook example of a large third-party seller platform: Amazon and platform e-commerce.
1P vs 3P (common terminology)
On some major platforms, the detail “sold and shipped by the operator” (often marked as 1P or equivalent) differs from the “third-party seller” (3P) model: the rules, margins, and visibility issues are not the same. Do not confuse this with “simple” e-commerce on a proprietary site.
“Open” or selective marketplace
Some platforms filter sellers (invitation, enhanced KYC), while others make entry easier and then tighten policies: read the current terms before projecting your catalog over several years.
Key differences for the seller: contract, branding, data
On your own site, you generally control the brand experience end to end. On a marketplace, the visual environment, required fields and display order are imposed or heavily constrained.
Customer data
Data and remarketing policies differ: often less access to full contact details for the seller on a marketplace, depending on the platform's rules and user consents.
Return policy
Returns can be standardized by the platform or co-defined; see our returns guide for the internal reasoning, then adapt it to the channel's policy.
Intellectual property and counterfeiting
Marketplaces expose you to direct comparison with similar or questionable products: brand monitoring and reporting are part of the third-party seller's job, in addition to what the platform may remove according to its procedures.
Reviews and reputation
Public ratings on the marketplace strongly influence click-through rate and internal conversion; on your own site, you collect other signals (NPS, verified reviews). Both should inform the product roadmap.
Disputes
Card disputes or chargebacks may go through the platform: keep records of exchanges and shipping proof as you would on your own channel.
Economy: commissions, advertising on the platform, prices
On marketplaces, the channel cost combines variable commissions, subscription or optional fees, and often in-platform advertising to gain visibility. On a direct site, external acquisition cost (SEO, SEA, social) partly replaces these levers.
Pricing policy
Parity, MAP, sales: some platforms impose rules or algorithms that react to price differences with other channels. A “same price everywhere” strategy is not always optimal for margin if channel costs differ.
Interpreting the results
Compare gross revenue and net margin after all platform fees: a high figure on the marketplace can hide lower profitability than D2C.
Cash and payout delays
Marketplaces often hold funds while they cover returns and disputes: model your cash flow with the actual payment schedules, not just with order volume.
Bundled promotions
“Forced” sales or joint promotions: check the impact on margin and stock shared with your official site to avoid stockouts or inconsistent prices perceived by the customer.
Logistics: seller shipping, platform program, labels
Depending on the programs, you ship from your warehouses, from the platform's warehouses, or via an approved partner. The displayed delivery times and late penalties are often contractually set more strictly than on a site where you alone set the promise.
Allocated stock
Distributing stock across channels prevents stockouts on one channel and overstock on the other: the same SKU can have very different sales velocities.
Seller performance indicators
Marketplaces often score on-time delivery, cancellation rate, and customer service quality: a decline can reduce algorithmic visibility well before an apparent margin problem.
Parcel preparation
Labeling standards, required formats, imposed packaging suppliers: repeated non-compliance can cost more in penalties than in direct logistics on your own site.
Visibility: algorithm, listings, and on-site SEO
On a marketplace, internal visibility (search on the platform, Buy Box, rankings) depends on specific criteria: price, service, history, advertising. It is not Google SEO for your domain, even if the listing can also appear in external results.
Own site
You build authority and content on your domain; the work is different from optimizing a product listing within a third-party catalog.
Rich media content
Videos, guides, and detailed FAQs are often more flexible on your site; on a marketplace, templates and character limits require a different kind of creativity.
Remarketing
Owned audiences (email, SMS with consent) are in principle more accessible from your own site base than with certain platform restrictions: think synergy rather than blind duplication.
EU: platforms, transparency and the DSA framework (practitioner’s perspective)
Operators of digital services and online marketplaces are subject to a strengthened European framework of transparency, traceability of professional sellers and reporting mechanisms, in line with the Digital Services Act. Implementation details are evolving: keep up to date with your counsel on the obligations that apply to you as a seller or as an operator.
Key caution
Do not confuse the obligations of the seller (pre-contractual information, product compliance) with those of the platform: the two worlds intersect, but the roles do not automatically merge.
Useful link
European Commission: overview of the DSA and related digital policies.
Consumers and information
European rules on online commerce and consumer protection set information requirements; on a marketplace, the buyer must be able to identify the seller: your seller profile and legal notices must be kept up to date.
Monitoring
Public guides and Commission updates supplement occasional legal advice: build an annual review of obligations into your compliance calendar, especially if you operate in multiple countries.
Strategy: marketplace as a lever, D2C as an asset
Many brands use the marketplace for volume, discovery, or rapid international expansion, and their own site for margin, community, and data. The balance depends on the category and brand power.
Cannibalization
If the customer was searching for your brand, the coexistence of marketplace / site can fragment traffic: internal rules on pricing, product exclusivities, or bundles help provide structure.
Testing
Testing a channel with a sub-catalog or a pilot country limits risk before involving the entire organization.
Product Innovation
Launches can first go through the site to measure real demand before expanding to a marketplace, where comparison can erode price perception if positioning is not stabilized.
Community and CRM
Loyalty programs, UGC, post-purchase email: the owned site often remains the best hub for the long-term relationship; the marketplace sometimes serves as an entry point and then a relay to this hub via packaging or content included in the parcel (in compliance with channel rules).
Customer support and messaging: who responds, in what tone?
Buyers often contact the platform first for disputes or refunds; the seller receives tickets according to the channel rules. On your site, you define inbound flows and SLAs (see the inbound customer service blog guide).
Brand consistency
Prepare standard responses aligned with your positioning even when the channel limits customization: tone matters for the perception of quality.
Response time
Time requirements can be stricter on the platform than directly: incorporate them into your internal support schedules and inbound handling scripts.
Escalation
Knowing when the dispute is escalated to the platform's mediation avoids duplicate customer efforts and inconsistencies in refunds.
Hybrid: Shopify, connectors, and omnichannel
Solutions connect a proprietary store and marketplaces (inventory, orders): the benefit is to synchronize stock and prices; the risk is complexity if each channel has its own promotional rules.
Shopify
For the e-commerce site, the ecosystem Shopify with an AI chatbot for e-commerce (Qstomy) makes it possible to unify support and assisted selling on the channel you control best, then expand the playbooks across secondary channels.
Unified data
When connectors synchronize orders and stock, document the “conflict rule”: in the event of a discrepancy, which channel takes precedence to avoid overselling.
Technical roadmap
Prioritize integrations that reduce manual work (labels, statuses) before piling on marketing features: operational reliability comes first when multiple channels run in parallel.
FAQ, common errors and summary
“Are e-commerce” and “marketplace” interchangeable? No: the first is a family of online sales; the second is a form of distribution via a multi-seller platform.
Can I do marketplace only without a website? Yes, many sellers start this way; you depend more on the platform’s rules and algorithm.
Does the SEO of my marketplace listing replace my website? No: they are two different areas (internal visibility vs content ownership on your domain). Ideally complementary, not exclusive.
How does Qstomy fit in? By mainly assisting the channel where you control the experience (storefront), to answer questions about the catalog, policies, and product guidance, with intent tracking.
For further reading
Articles already mentioned: e-commerce operation, catalog, SEO, Amazon marketplace, returns, Shopify, AI chatbot. For measurement (conversion in Google Analytics, etc.), see the analytics blog guides.
Sources
Enzo
April 8, 2026
