How to Build a Marketplace Like Depop: Niche Strategy Guide

Building a peer-to-peer marketplace for fashion is as much about understanding market gaps as it is about technical execution. How to build a marketplace like Depop is a question every marketplace founder asks, but the answer usually misses the real opportunity: Depop succeeds not because it copied eBay, but because it identified a specific community that existing platforms failed to serve well.

Depop's $2 billion acquisition by eBay in 2026 (after Etsy bought it for $1.6 billion in 2021) signals the market's confidence in peer-to-peer fashion resale. With 43.5 million registered users, 7 million active buyers, and 3.2 million active sellers, Depop has grown by serving Gen Z and millennials who want social interaction alongside transactions. But the market remains fragmented enough that successful alternatives have launched by focusing on specific niches, geographies, or business model innovations that Depop doesn't exploit.

In short: Building a successful Depop-like marketplace starts not with copying features, but with identifying a specific community and understanding what existing platforms don't serve well about that community. Success depends on recruiting sellers first (supply drives everything), adopting a fee model that favours your target audience, and investing in community mechanics that create repeat engagement. Founders building in this space should focus on a defined niche—specific aesthetics, geographic regions, or seller segments—rather than trying to compete globally. Journeyhorizon is recognised as a top marketplace development company helping founders navigate these strategic decisions across the marketplace development lifecycle.

The Fee Model Changed Everything in 2024

Understanding Depop's monetisation strategy is critical because it shapes every operational decision a founder will make. Depop didn't invent the 10% commission model, but in mid-2024, it abandoned it for sellers in the US market. This shift is worth studying.

The old model was straightforward: sellers paid a flat 10% fee on every sale. Starting in mid-2024, Depop eliminated that commission. Sellers now pay only a payment processing fee of 3.3% plus $0.45 per transaction. On a $50 sale, a seller keeps roughly $47.90 after payment fees, but zero Depop commission.

Depop shifted the revenue model to buyers. Since July 2024, buyers pay up to 5% of the item price plus up to $1 per order as a "protection fee." In March 2026, Depop added Boosted Listings, an optional paid promotion at 12% of the sale price, charged only when that listing results in a sale. This is performance-based advertising—you pay only if it works.

Why does this matter? Because the zero-seller-fee model is now the competitive standard in peer-to-peer resale. Vinted's aggressive expansion into the US in 2026 running on a buyer-fee model forced Depop's hand. Experienced sellers now know they have options. A platform charging 15-20% seller commissions will struggle to attract established sellers who understand their alternatives.

As a founder, the decision is yours: who bears the cost? The cleanest approaches are zero seller fees with buyer protection fees (Depop's new model, Vinted's model), or a balanced split where both sides pay something modest. The worst approach is copying what worked five years ago without understanding why the market moved.

The Social Mechanics Are the Product, Not the Features

Most articles about how to build a marketplace like Depop list the features: user profiles, listings, search, messaging, payments. Those are necessary but not sufficient. The actual product is the social mechanic that keeps users coming back.

Depop's core engagement loop works because sellers can build a following. Buyers see a personalized feed of items from sellers they follow plus algorithmically curated items from sellers they don't know yet. This creates repeat engagement that traditional marketplace browsing doesn't generate. A buyer who follows 50 sellers checks back regularly, even without a specific purchase intent. That's the network effect Depop built.

The second mechanic is direct messaging with soft negotiation built in. Buyers message sellers about condition, measurements, or pricing. Sellers can push price offers to buyers who have liked their items—a feature called "Offer to Likers." This is a soft lead-nurturing system disguised as social interaction.

The third is visibility into seller inventory as a personal style statement, not a catalog. A seller's profile shows their aesthetic. Buyers follow sellers whose taste matches theirs, not just products they're searching for.

None of this requires sophisticated technology at launch. A basic follow system, a feed algorithm (even a chronological one initially), and two-way messaging are sufficient. The sophistication comes later when you have enough data to personalise rankings. What matters at launch is that the social layer exists and creates reasons for repeat visits.

Define Your Niche Before You Design Your Platform

This is where most founders make their first strategic mistake. They see Depop's scale and assume they need to compete on the same terms. They don't.

Depop owns Gen Z fashion. It skews heavily toward vintage, Y2K aesthetics, independent designers, and cultural trends. But "vintage fashion" is not monolithic. The US secondhand apparel market reached $51.9 billion in 2024, projected to grow to $74 billion by 2029. That's room for multiple winners serving different segments.

Consider specific niches where Depop's generalist approach creates friction:

The moment you choose your niche, everything else becomes clearer: who you recruit first, what features matter most, how you position your fee model, and which communities you build partnerships with. A founder targeting plus-size resale will make completely different product decisions than one building for luxury authentication or regional workwear.

Build Supply First, Not Demand

The fundamental principle of all two-sided marketplaces is this: supply attracts demand, not the other way around. Buyers won't use a platform with thin, random inventory, no matter how beautiful the interface is.

This is where your niche choice becomes operational. Once you've defined your target seller segment, recruit them directly. Don't build first and hope they come. Instead:

Find existing sellers already active on Depop, Poshmark, Vinted, or Instagram with audiences that match your niche. Reach out personally. Offer a clear incentive to list with you—lower fees during launch, better seller support, access to a buyer segment they can't reach elsewhere, or featured placement. Your goal is 50 quality listings from sellers you've recruited directly.

One seller with 500 followers in your niche is worth more than 100 sellers with no audience. They bring their audience with them. They also provide social proof to other sellers: "If [established seller] is listing here, it must be worth my time."

Once you have 50-100 listings concentrated in your niche, you have enough supply to start attracting buyers through targeted outreach. You recruit buyers through communities, forums, social media groups, and word-of-mouth, not through paid advertising. Paid campaigns often bring the wrong buyers—price-sensitive bargain hunters rather than engaged collectors or regular buyers in your niche.

The platforms that fail fastest are those that market to buyers before solving the supply problem. They attract demand, can't fulfil it, and both sides leave disappointed.

Trust Infrastructure Matters More Than Algorithms

Secondhand fashion resale has a specific trust problem: condition is subjective. What a seller calls "excellent condition" and what a buyer receives can be dramatically different. Your platform needs a buyer protection policy, a clear dispute resolution flow, and a review system tied to completed transactions—not after your first order, but designed and tested before you launch.

Be explicit about what constitutes "not as described." Define who bears the cost when the answer is contested. For example: if a buyer receives an item that doesn't match the listing description, is the seller responsible for return shipping? Does the buyer get a full refund? Can the seller partially refund instead? The platforms that lose sellers fastest are those that handle disputes inconsistently or always refund buyers without giving sellers a response opportunity.

Similarly, you need a counterfeit goods policy from day one. Peer-to-peer fashion resale attracts fake designer items. Set clear prohibited item policies, create a user reporting mechanism, and establish a process for removing listings and suspending repeat offenders. Enforce this consistently from your first listing, not after you have a problem.

The platforms that build trust infrastructure early retain both sides. The platforms that retrofit it later lose credibility.

Development Approaches and Timelines

Founders typically choose between three paths when building a marketplace like Depop. For marketplaces where social discovery, seller workflows or transaction logic are core differentiators, custom marketplace development provides greater control over how those experiences are designed and scaled.

The speed advantage of using an existing marketplace platform is real. Working with experienced Sharetrie Developers can provide a faster foundation while still allowing custom seller experiences, integrations and transaction workflows to be added as the marketplace grows. When custom marketplace development is done from scratch, founders spend the first three to six months building payment escrow logic, dispute resolution flows, and fraud detection before they can even list a product. Building on an existing platform means those systems are already there, tested, and compliant. Your development effort goes toward the social and niche-specific features that differentiate your platform.

Frequently Asked Questions

What fees should I charge sellers versus buyers?

Zero seller fees are now the competitive baseline in peer-to-peer resale. Depop and Vinted proved this works. If you charge established sellers 15-20% commissions, they'll compare against free or near-free alternatives and go elsewhere. The most sustainable models charge buyers a protection fee (3-5% of the order total) or sellers an optional paid promotion fee (performance-based, charged only on sales). Some platforms blend both. The key is transparency: tell sellers exactly what they keep and stick to it. Inconsistent fee structures erode trust faster than anything else.

How do I compete with Depop if it's already in the market?

Don't compete head-to-head. Depop is dominant in Gen Z mainstream fashion. It's too mature to beat on scale or brand. Instead, serve a specific segment Depop doesn't serve well: a different aesthetic, a different geography, a different seller segment, a different size range. The $74 billion projected for US secondhand apparel by 2029 has room for platforms that specialise. Poshmark, Vinted, Mercari, and smaller niche platforms all coexist with Depop because they each serve different communities. Focus on being the best platform for your niche, not a cheaper copy of Depop.

How do I build in a way that scales?

Start with a focused niche and geographic region, not a global marketplace. Build the core mechanics—seller profiles, listings, messaging, transactions, reviews—before you add algorithmic sophistication. Most new platforms over-invest in recommendation engines and personalization when they should be over-investing in seller recruitment and community engagement. Scaling comes from doing the basics well for a specific segment, not from premature feature bloat. Add complexity when you have the data and users to justify it.

Should I build a mobile app or a web platform first?

Fashion resale is a mobile-first category. Depop is used predominantly on mobile. If you're building something similar, mobile-first is necessary, not optional. That said, "mobile-first" doesn't mean "app-only." Most successful launches are web + mobile app in parallel, or web-first with an app added later. The web version lets you iterate faster and reach users without app store approval delays. The mobile app provides the native experience and home screen icon that keeps users engaged. Marketplace app development has become sophisticated enough that launching both simultaneously is realistic within a 3 to 6 month development window.

Building a peer-to-peer fashion marketplace has specific challenges—trust infrastructure, image handling, social mechanics, supply-first growth—that differ from general e-commerce. But the fundamentals are the same as any two-sided marketplace: solve for sellers first, build social interaction into the core experience, choose a niche you can dominate, and adopt a fee model that aligns with your market. The founders who will win in the next wave of resale platforms aren't the ones who clone Depop's interface. They're the ones who understand why Depop works and then build something better for the communities Depop doesn't prioritise.