ConceptCool: Multiplayer App-Building with Real Backend Infrastructure
philhchen · x · 2026-09-01
ConceptCool is a multiplayer app-building tool built on Railway infrastructure. Users can edit the same prompt live with teammates, and the resulting app scales automatically from 1 to 1000 users. Unlike simple CRUD apps or Claude Artifacts, it features real queues, containers, and background jobs, reflecting actual production tool capabilities, and supports integrations with Gmail, Slack, Stripe, and hundreds more.
Related event: ConceptCool: Collaborative Prompt-Based App Builder(2 posts)→
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