Barterri

Marketplaces

Swap goods and services without money — direct deals and 3-4 party chains.

A money-free barter marketplace: a user posts a listing, receives offers, negotiates through offer revisions and closes the deal right in chat.

The standout feature is 3-4 party exchange chains: when a direct swap does not add up, the system finds a closed loop across the favourites graph — keeping the marketplace liquid without a single payment.

Stack

Django NinjaVue 3PostgreSQL 17ChannelsCeleryMapLibreTailwind

What's inside

✓ Exchange chains for 3-4 participants
✓ Realtime chat and notifications over WebSocket
✓ Listings map with clustering
✓ Negotiation via offer revisions