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Marketplace Development Company for Multi-Vendor Platforms

We build two-sided marketplaces: vendor onboarding, split payments through Stripe Connect, commission logic and the trust and safety tools a multi-vendor platform needs to run.

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Seller wrapping a cardboard box at a work table in a bright studio
NDA before discovery
You own the code and IP on payment
Code in your repository from day one
A working demo every two weeks
Senior engineers do the work
How we work

A marketplace is not a storefront with more sellers attached. It has to onboard and verify vendors, split a single payment between the platform and multiple sellers, calculate commissions correctly on every transaction, and give both sides enough trust in the system to keep transacting without a person mediating every dispute. As a marketplace development company, we build these mechanics as the core of the product, not as features added after a basic storefront ships.

Payment splitting is usually the hardest part to get right, and we build it on Stripe Connect or a comparable payment infrastructure so funds move to vendors correctly, platform fees are deducted automatically, and payouts, refunds and disputes are handled without your team reconciling transactions by hand. Vendor onboarding and verification run alongside it, since a marketplace's trust problem starts before the first transaction, at the point a new seller signs up.

What we deliver is a platform where buyers trust the vendors enough to transact, vendors trust the payout process enough to keep listing, and your team has the tools to intervene when trust breaks down, without that intervention being the only thing keeping the marketplace running.

What we deliver

Marketplace Development services

  • Vendor Onboarding and Verification

    Signup, identity and business verification, and listing approval flows designed to get legitimate vendors live quickly while catching the ones your platform shouldn't onboard.

  • Split Payments with Stripe Connect

    Payment infrastructure that splits each transaction between the platform and vendors automatically, handling platform fees, payouts, refunds and failed payments without manual reconciliation.

  • Commission and Fee Logic

    Commission structures that vary by vendor tier, category or promotion, calculated correctly on every transaction rather than approximated after the fact.

  • Trust and Safety Tooling

    Review systems, dispute workflows and vendor performance monitoring that give your team the tools to intervene before a bad actor damages buyer trust.

  • Vendor Dashboards and Reporting

    Self-serve tools for vendors to manage listings, track orders and view payout history without emailing your support team for basic information.

  • Search, Discovery and Ranking

    Listing search and ranking logic that balances relevance to the buyer with fair visibility across vendors, rather than favoring whoever joined first.

  • Dispute and Refund Management

    Structured workflows for buyer-vendor disputes and refunds, with a clear audit trail instead of every case being resolved ad hoc over email.

You receive

Deliverables

  • A deployed marketplace platform with buyer and vendor-facing interfaces
  • Stripe Connect or equivalent payment infrastructure configured for split payments and payouts
  • Vendor onboarding and verification workflows
  • Commission and fee logic matched to your actual business rules
  • Dispute and refund management workflows with an audit trail
  • Vendor-facing dashboards for listings, orders and payouts
  • The marketplace codebase in your own repository from the first commit

How we work

Our marketplace development process

  1. Marketplace mechanics design

    We define vendor onboarding requirements, commission rules and payout timing before building anything, since these decisions shape the entire data model and payment integration.

  2. Payment infrastructure setup

    Stripe Connect or a comparable payment provider is configured for split payments, with platform fees, refunds and payout schedules tested against your actual commission structure.

  3. Vendor and buyer experience build

    Onboarding, listing management and the buyer-facing discovery and checkout experience are built in parallel, since one side of the marketplace without the other has nothing to transact against.

  4. Trust and safety tooling

    Review systems, vendor performance monitoring and dispute workflows are built before launch, not added once the first dispute happens with no process to handle it.

  5. Payment and payout testing

    We test split payments, refunds, failed transactions and payout timing against edge cases directly, since a payment bug in a marketplace affects money moving to a third party, not just your own account.

  6. Launch with a seeded vendor base

    We help plan a launch with enough vendors and listings that early buyers see a real marketplace rather than an empty platform on day one.

Why Payment Splitting Is the Hardest Part to Get Right

A single marketplace transaction involves a payment collected from a buyer, a platform fee deducted, and a payout sent to one or more vendors, each with its own refund, dispute and tax implications. Getting this wrong shows up as delayed vendor payouts, incorrect fee calculations, or a reconciliation process your finance team dreads every month.

We build this on Stripe Connect or a comparable payment infrastructure designed specifically for split payments, so platform fees, vendor payouts and refunds are handled by infrastructure built for this exact problem rather than approximated with custom logic layered on top of a standard payment processor.

Solving Trust Before the First Transaction

A marketplace's trust problem starts at vendor signup, not at the first dispute. A platform that lets any seller list immediately will eventually onboard a bad actor, and a platform with too much friction at signup will lose legitimate vendors who give up before listing their first item.

We calibrate vendor verification to your actual risk profile, lighter for low-risk categories, heavier identity and business verification for higher-risk ones, and build review and performance monitoring so problems surface from buyer feedback before they require a support escalation to catch.

  • Verification depth calibrated to category risk, not a single blanket process
  • Vendor performance monitoring that surfaces problems from buyer feedback early
  • A dispute workflow with a clear audit trail instead of ad hoc email resolution

Designing Commission Logic That Doesn't Break at Edge Cases

Flat commission rates are simple until the business needs tiered rates by vendor volume, category-specific rates, or promotional periods with reduced fees, and a commission engine built only for the simple case usually has to be rebuilt when the first exception arrives.

We model commission logic as configurable rules from the start, tested against the exceptions your business already knows it needs, refunds after a payout has been sent, partial refunds, disputed transactions, rather than hardcoding a single rate and treating every exception as a special case handled manually.

Technology

Technologies we use

Industries

Marketplace Development by industry

Solutions

Systems we build with this service

Budget

What drives cost and timeline

  • Payment splitting and payout complexity

    A flat commission on every transaction is simpler to build than tiered commissions, promotional rates and staggered payout schedules across vendor categories.

  • Vendor verification requirements

    Basic email verification is quick to build; identity verification, business document checks and manual review queues take considerably more work.

  • Trust and safety scope

    Review systems and vendor performance monitoring add meaningful design and moderation-tooling work beyond the core transaction flow.

  • Search and discovery sophistication

    Basic category browsing is straightforward; ranking algorithms balancing relevance and fair vendor visibility take more design and testing.

  • Number of integrations

    Each connection to a shipping provider, tax engine or external vendor system adds its own integration and error-handling work.

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Compliance

Standards we design and build to

None of these is a certification or attestation held by this agency. They are the standards we design and build client systems to, so your own audit or assessment starts from a sound base.

  • GDPR / UK GDPR

    Personal data handled on a lawful basis, with data minimisation and a documented retention policy.

  • HIPAA safeguards

    Administrative, physical and technical safeguards applied where a system touches protected health information.

  • PCI DSS scope reduction

    Card payment flows tokenised through a certified processor so cardholder data never touches your systems.

  • SOC 2 readiness

    Access control, change management and audit logging built in from day one, ready for a client's own SOC 2 audit.

  • WCAG 2.2 AA

    Keyboard navigation, colour contrast and screen-reader labelling checked against the AA success criteria.

  • OWASP ASVS

    Authentication, session handling and input validation reviewed against the Application Security Verification Standard.

We list certifications only when they are real and current. See our security practices →

FAQ

Marketplace Development FAQs

How does split payment work between our platform and vendors?

We build this on Stripe Connect or a comparable payment infrastructure designed for marketplaces, which collects payment from the buyer, deducts your platform fee automatically, and routes the remainder to the vendor as a payout. Refunds, disputes and failed payments are handled by the same infrastructure rather than reconciled manually.

How do you verify vendors without slowing down onboarding too much?

We calibrate verification depth to the actual risk of the category: lighter checks for low-risk vendors so they can list quickly, and heavier identity or business document verification for higher-risk categories where fraud or safety concerns are greater. The goal is catching bad actors without losing legitimate vendors to friction.

Can you build commission rates that vary by vendor tier or category?

Yes. We model commission logic as configurable rules rather than a single hardcoded rate, so tiered rates, category-specific fees and promotional periods can be set without engineering changes each time your business rules change.

What happens when a buyer and vendor have a dispute?

We build structured dispute workflows with a clear audit trail, refund handling that accounts for payouts already sent to vendors, and status tracking your support team can act on, rather than every dispute being resolved ad hoc over email with no record.

Do vendors get their own dashboard to manage listings and payouts?

Yes. Vendor-facing dashboards for managing listings, tracking orders and viewing payout history are part of a standard marketplace build, since vendors emailing your support team for information they should be able to see themselves does not scale past a handful of sellers.

How long does it take to build a marketplace platform?

A marketplace with vendor onboarding, split payments and basic search typically takes sixteen to twenty-four weeks. Platforms with tiered commissions, heavier vendor verification or complex trust and safety tooling usually run seven to eleven months.

How do you handle marketplace launch when there are no vendors or buyers yet?

We plan the launch sequence with you, typically seeding a vendor base before opening to buyers, since an empty marketplace on day one damages trust with the first buyers who visit. The platform itself is built to support this staged rollout rather than assuming full scale from launch.

Insights

Guides for planning this work

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