Join.To.IT builds marketplace software for operators who sit between many sellers and many buyers. The work is onboarding, listing control, commissions, split payouts, and trust and safety — not a single-brand catalogue with a checkout theme.
A marketplace is a three-sided operation. You need seller applications that can be approved or rejected, listings that can be taken down, money that splits across parties, and a way to handle fraud and disputes without the office living in spreadsheets.
Hosted storefronts are built for a merchant who owns the catalogue. We build the operator layer: who may sell, what they may list, how fees are calculated, when funds release, and how buyers and sellers escalate a problem.
Start with onboarding and payouts — the two places multi-seller platforms leak trust — then extend into moderation and disputes.
Application, verification, and account states so new sellers do not appear on the marketplace until they meet your rules.
Seller-submitted products with operator rules for categories, required attributes, and what goes live.
Fee logic that can vary by category, seller tier, promotion, or fulfilment method — not a single percentage on every order.
Order money allocated to sellers, the marketplace, and any other party, with holds until delivery or dispute windows close.
Tools for the team that reviews sellers, listings, and orders when something looks wrong.
A structured path for buyers and sellers to raise issues, exchange evidence, and receive a decision.
Marketplaces generate more listings and messages than a small ops team can read. AI is useful on intake, policy checks, and first-pass dispute summaries — with a human still making the call that affects a seller’s livelihood.
Our Join.To.IT AI development team connects these capabilities to your seller records, listings, and dispute history.
Flag prohibited categories, missing attributes, and copy that looks copy-pasted from another seller before it goes live.
Surface unusual return rates, payout failures, or sudden catalogue spikes for the trust team to review.
Turn message threads and order events into a short brief so operators decide faster without missing context.
Draft answers from your marketplace policies and order status, then hand off when the case is not standard.
Find near-duplicate SKUs across sellers so the catalogue stays searchable instead of flooded.
We integrate payment providers that support marketplace splits, identity and document checks where you require them, tax calculation, carriers or 3PLs when the marketplace owns fulfilment, and messaging channels used in disputes.
Join.To.IT builds the marketplace software. The payment provider handles regulated money movement. We do not operate as a bank or payment institution.
A hosted store assumes one merchant owns inventory and takes the payment. Marketplace rules around who can sell, how fees work, and when funds release are commercial decisions. Custom software is warranted when those rules are the product.
Onboarding, permissions, and suspensions need their own lifecycle, not a second admin login on a brand store.
Commission, listing, and promotional fees rarely fit a single discount field in a standard checkout.
Holds, splits, and failed transfers need an audit trail operators can explain to sellers.
Moderation queues and disputes are not a plugin afterthought; they are how the marketplace stays usable.
Search, ranking, and policy have to work when no single brand owns every SKU.
The same Join.To.IT delivery process, applied to seller onboarding, commissions, payouts, and trust workflows.
Map how sellers apply, list, fulfil, get paid, and raise disputes today, including who currently decides each exception.
Define the data model for sellers, listings, orders, fees, and payouts, plus the payment provider and identity integrations.
Design seller, buyer, and operator interfaces so moderation queues and statements are first-class, not admin leftovers.
Build onboarding and listing control first, then commissions, split payouts, and dispute handling in releases operators can run.
Test approval paths, fee calculations, payout holds, and dispute deadlines with realistic multi-seller order scenarios.
Launch with a limited seller cohort, then open onboarding and tune moderation rules and payout calendars.
We choose technologies based on seller volume, listing velocity, payout cadence, and how much fulfilment you own versus sellers.
Practical answers for marketplace founders, operators, and product leads.
