Hackathon · 2026 · Fleek × a16z Hackathon · London 2026
SupConnect
An AI voice agent that answers buyer calls for secondhand clothing suppliers at any hour, qualifies the deal, and leaves a ready lead for the morning.
TypeScript · Next.js · ElevenLabs · WebSockets
The problem
Secondhand clothing suppliers sell across time zones. When a buyer calls at 3am and nobody picks up, the sale walks to whoever answers first.
What I built
We built a voice agent that picks up every call, answers only from the supplier's own catalogue, fills in the deal details live as the buyer talks, and leaves a structured lead in the dashboard by morning. The model does the talking, but deterministic code makes every decision.
What it does
- Never Misses a Call. It answers 24/7 in the browser, by voice or text, on the same pipeline.
- Sticks to the Catalogue. It only answers from supplier-approved knowledge. If it does not know, it says so instead of inventing a price.
- The Model Talks, the Code Decides. Lead status, escalations, and next actions come from a deterministic state machine, never from the LLM.
- Numbers You Can Trust. A guardrail rejects any number in the summary that did not come from the catalogue, and falls back to a plain template.
Photos
Gallery
The full engineering is on GitHub.