Fashion marketplace where each vendor manages their own stock levels outside the platform and manually updates listings when items sell out -- so buyers see available sizes that don't exist?
Returns policy that differs by vendor but the platform has a single returns flow, creating disputes every time a buyer returns an item to the wrong address?
Fashion Marketplace Development
A fashion marketplace has requirements that a generic marketplace platform cannot model well. Each vendor manages their own size runs, which means stock levels per size must be tracked per vendor. Returns policies differ by vendor. Buyers searching for a specific size need to see only the styles that are actually available in that size across all vendors -- not styles where their size is sold out.
We build custom fashion marketplaces with multi-brand vendor onboarding, per-vendor size run and inventory management, unified checkout with split payments, returns handling that respects each vendor's policy, and buyer-facing search with size, style, and brand filters applied against real-time stock data.
Multi-brand vendor onboarding with inventory management per seller
Unified checkout with split payment and vendor payout
Size and variant search with real-time stock filtering
Returns handling with per-vendor policy configuration
RaftLabs builds custom fashion marketplaces with multi-brand vendor onboarding, per-vendor size run and inventory management, unified checkout with split payments and automated vendor payouts, buyer-facing search with size and style filters, and returns handling that respects each vendor's policy. Most fashion marketplace projects ship in 12--16 weeks at a fixed cost.
100+Software products shipped
·FixedCost delivery
·10-14Week delivery cycles
·24+Industries served
Why fashion marketplaces need purpose-built software
Generic marketplace platforms handle the common case: one product, one seller, one fulfilment address. Fashion adds complexity at every layer. A single style has multiple size and colour variants, each tracked at the SKU level. Stock levels change as sizes sell. The buyer searching for a size 10 dress needs to see only results where a size 10 is in stock -- not results where size 10 is sold out but other sizes are available. Returns go back to the individual vendor, not to a central warehouse, and the vendor's policy may differ from the next vendor's policy.
When these requirements are handled through manual processes -- vendors updating a spreadsheet, the marketplace team manually routing returns, size availability shown from a cached stock level rather than a live count -- the operational burden grows with every new vendor and every order. A custom fashion marketplace models these requirements directly so the platform handles the complexity, not the team.
What we build
Vendor onboarding and profile management
Self-serve vendor application flow with brand profile creation, document upload for business verification, and an operator approval queue. Vendor dashboard with product listing tools, order management, stock level updates, and sales reporting. Policy configuration per vendor: return address, return window, accepted return reasons, and exchange availability. Vendor performance metrics visible to the operator: on-time fulfilment rate, return rate, buyer rating, and response time to buyer queries. Vendor communication tools for policy announcements and seasonal guidance. Operator tools to suspend, feature, or tier vendors without a code change. The onboarding layer that replaces email back-and-forth with a system vendors can use independently.
Size run and inventory management per vendor
Per-vendor product listing with full size run and colour variant management. Each vendor manages their own stock levels per size per style, with updates reflected on the marketplace in real time. When a size sells, the stock count is decremented immediately -- no manual update between sale and display. Low stock alerts sent to the vendor when a size drops below a configurable threshold so they can restock before the size sells out. Operator-level inventory visibility across all vendors so the marketplace team can see which styles and sizes are running low across the catalogue. Bulk import tools for vendors managing large catalogues -- CSV upload with size run mapping so vendors do not have to list each variant individually.
Unified checkout and split payments
Single checkout for the buyer across items from multiple vendors. The checkout collects payment once, then the backend splits the order into per-vendor orders with the correct items, amounts, and fulfilment details. Commission and fee deduction calculated automatically before vendor payout -- the vendor receives their net amount without the marketplace having to invoice them for commission after the fact. Stripe Connect integration for automated vendor payouts on a configurable schedule -- daily, weekly, or monthly -- with a holding period to cover return windows before funds are released. Vendor financial dashboard showing gross sales, fees charged, pending payout, and payout history. The checkout and payment layer that removes manual payment runs and makes commission collection automatic.
Buyer search and discovery
Buyer-facing search and browse built on real-time stock data. A buyer searching for a size 12 sees only styles where a size 12 is currently in stock -- across all vendors simultaneously. Filters for size, brand, style category, colour, price range, and delivery time applied against live inventory. Keyword search with fashion-specific relevance: a search for "linen midi dress" returns results ranked by style match, not just title match. Saved size filter so returning buyers do not have to set their size on every visit. New arrival and sale sections with size filtering applied. The search layer that makes the marketplace useful for buyers who know their size and are filtering for availability, not just browsing.
Returns and dispute management
Per-vendor return policy displayed on each product page so the buyer sees the relevant policy before they buy. Returns initiated from the buyer's order history with item selection and reason codes. Each return routed to the correct vendor automatically based on the item. Vendor notified of the return with the buyer's reason and item condition on receipt. Refund processed from the buyer's return, with commission reversal applied to the vendor's next payout for returns received before the payout date. Operator dispute resolution override: if a vendor is non-responsive on a return, the operator can issue a refund to the buyer and adjust the vendor's payout. Returns reporting by vendor so the operator can identify vendors with high return rates or unresolved disputes.
Vendor analytics and payout reporting
Vendor analytics dashboard with sales by style, size, and period. Sell-through rate per size so vendors can see which sizes are moving and which are sitting. Return rate by style and reason code so vendors can identify fit or quality issues. Buyer rating breakdown by order so vendors see which transactions generated negative feedback. Payout history with itemised commission and fee deduction per payout period. Operator-level analytics across all vendors: top-performing vendors by GMV, return rate, and buyer rating. Category performance by vendor so the operator can see which brands are driving the most sales in each style category. The reporting layer that gives both vendors and the operator the data they need to make stocking and commercial decisions.
Frequently asked questions
A general marketplace assumes one product, one seller, and standard fulfilment. Fashion adds size run complexity at the inventory layer, per-vendor return policies at the operations layer, and size-filtered search at the discovery layer. When a buyer filters by size, the platform needs to query live stock counts per size across every vendor simultaneously -- not a cached product list. When a return arrives, the platform needs to route it to the correct vendor, apply the correct policy, and reverse commission on the payout, all automatically. These requirements can be approximated with manual processes at small scale, but they require a proper data model and automation to work at any meaningful volume. Generic marketplace platforms either cannot model them at all or require significant custom development to approximate them, at which point you are paying for a platform you are also rebuilding.
Each vendor manages their own inventory inside the marketplace platform. When a vendor updates a stock level -- either manually through their dashboard or via a bulk import -- the change is reflected on the marketplace immediately. When a sale occurs, the platform decrements the stock count for the specific size and colour variant sold and updates availability across all search and browse surfaces in real time. Vendors do not manage stock in an external spreadsheet and manually update the marketplace -- that process is replaced by the vendor dashboard and bulk import tools. For vendors with an existing inventory system -- a standalone warehouse management tool or a small ERP -- we build a sync integration so stock levels are updated automatically without the vendor having to manage two systems.
Each vendor configures their return policy in the platform: return window in days, accepted return reasons, whether exchanges are offered, and the return address. This policy is stored against the vendor's account and displayed on every product page for that vendor. When a buyer initiates a return, the platform checks the policy for the vendor who sold the item and applies the correct rules -- return window check, reason code validation, and return address routing. The buyer sees the relevant policy for each item in a multi-vendor order. Refunds are processed per vendor order, not as a single transaction, so a return of one vendor's item does not delay the refund for another vendor's item in the same basket. If a vendor's policy creates a dispute -- for example, a vendor refuses a return the marketplace operator considers valid -- the operator can override and issue the refund, with the cost deducted from the vendor's next payout.
A full fashion marketplace -- vendor onboarding, per-vendor size run inventory, unified checkout with split payments, Stripe Connect payouts, size-filtered buyer search, and per-vendor returns handling -- typically runs $40,000--$100,000. A more focused build covering vendor onboarding, a product catalogue with size filtering, and checkout with split payments typically runs $20,000--$55,000. The range is driven by the number of vendor management features needed on day one, catalogue complexity, returns automation requirements, and whether a mobile app for buyers or vendors is included. We scope and price every project before development starts. Contact us with your vendor model, category type, and commission structure and we'll give you a specific fixed cost.
