Radiopaper bet reply-gated public chats could stop trolling; 2022 Show HN drew 346 points

Radiopaper was a bet that trolling is not a people problem but a design problem. Four developers built a public-conversation platform in which every thread is a one-on-one exchange and a message is not published until the person it addresses replies or accepts it — the author of a reply effectively consents to being seen to have answered. Their framing, which they called 'social skeuomorphism', was that a social network should behave like the best in-person events, where ignoring someone who has walked away is publicly rude.

The team (Evan, Dave, David Schaengold and youngnh) spent about 16 months building Radiopaper alongside jobs, then posted it as a Show HN on 2022-04-29. The thread drew 346 points and 323 comments, and the founders used it to defend the mechanism against the predictable attacks: sock puppets, echo chambers, and censorship by silent non-approval. They explained that published conversations cannot be blocked or unpublished by either party, that ignored messages sink rather than promote a thread, and that consent gating complements ordinary anti-spam and anti-bot filters.

The operation was engineered to survive without investors: a Vue/TypeScript app and Go API on Cloud Run with Firestore scaled to zero, and the whole stack plus SaaS tooling cost about $40/month. On days with a few hundred active users the founders said they were still inside the free tiers, so the project could run indefinitely without funding or revenue.

Radiopaper never announced funding or revenue, and the 2022 launch thread remains its most visible public record. As of 2026-09-05 the product's explore page still responded when crawled, more than four years after launch, but the conversation mechanism never spread beyond a niche following — evidence that a smarter social contract is hard to grow even when the design earns wide admiration.