# Marketplaces

> Buyers on one side, sellers on the other, your cut in the middle.

A multi-vendor marketplace with separate portals for buyers, sellers and your team — catalogue, orders, commission and payouts — where every party sees exactly what is theirs and nothing else.

- **Price:** quoted per project after a call — er@epsilon-labs.co
- **What moves the price above that floor:** Number of roles, whether payments are split automatically, currencies, and how much of seller onboarding is self-serve.
- **Typical duration:** 6–10 weeks
- **Category:** Software
- **Page:** https://epsilon-labs.co/products/marketplace/
- **Enquiries:** er@epsilon-labs.co

## The problem

A marketplace is three products pretending to be one: a shop for buyers, a back office for sellers and a control room for you. Most are built as a shop with the other two bolted on, and it shows the first time a seller sees another seller's orders.

Isolation between parties is the hardest part and the one nobody demos.

## What you get

- Buyer storefront, seller portal and admin console as separate role-scoped apps
- Catalogue with per-seller listings, variants and media pipeline
- Orders, commission and seller payouts
- Multi-currency quoting with scheduled exchange-rate refresh
- Row-level security so no party can see another's data
- Seller onboarding and verification

## How it runs

- **Weeks 1–2** — Roles, commission model and data isolation designed first.
- **Weeks 3–7** — Storefront, seller portal and admin built in parallel.
- **Weeks 8–10** — Seed sellers onboarded, soft launch, then open.

## This is for you if

- Niche B2B marketplaces — materials, surplus stock, equipment, services
- Businesses turning a supplier network into a platform
- Founders who need a real first version, not a template

## This is NOT for you if

- Consumer marketplaces at national scale on day one
- A single-seller shop — you need a store, not a marketplace
- Regulated financial marketplaces

## Proof

Fabricport is a B2B surplus-fabric marketplace we built: four role-scoped portals — public catalogue, buyer, supplier and admin — over row-level-secured Postgres, with a 3D fabric-scan viewer and scheduled FX refresh for multi-currency quoting.

See: https://epsilon-labs.co/work/

## Questions

### Can sellers get paid automatically?

Yes, through a payment provider that supports split payouts in your market. Where that is not available we build the payout ledger and you settle.