Show HN: Metcalfe – private network for marketplace operators

Metcalfe is a curated, invite-only network for founders and senior operators of online marketplaces. A space to connect, exchange hard-won lessons, and support each other — under Chatham House Rules.

What is Metcalfe about?

Operator-first conversations. Get honest input from people who've scaled marketplaces — what actually worked, what didn’t, and what they'd do differently.

Trusted recommendations. Whether you're hiring, raising, or picking a tool, get intros and referrals from peers who've been there.

High signal, low noise. Carefully curated members, thoughtful discussions, and no performative posting — just meaningful exchanges.

Who it’s for

Role: you are an operator or senior leader at an online marketplace.

Business model: your company is an online marketplace or platform business (B2B, B2C, or P2P) with network effects at its core.

Reputation: you’re known as thoughtful, driven, and collaborative. You share knowledge generously and value integrity.

Membership principles

You respect the Chatham House Rule, value privacy, and are here to contribute - not to pitch or sell.