PromptSkin — Swappable skin layer for LLM UIs

Gives every LLM product a truly differentiated, customizable chat interface

Problem

Developers complain all LLM interfaces look identical: conversations left, chat right, resources far right, same fonts. Building a branded, workflow-specific UI is hard because a from-scratch build is slow and error-prone.

Solution

A composable LLM chat component and theming layer so developers can quickly swap layout (canvas-style, multi-column, embedded), fonts, colors, and interaction patterns while keeping streaming, tool calls, and multimodality. It cuts differentiation from weeks to days.

Users

Indie devs building vertical AI products, teams customizing internal AI tools, design-driven AI startups

MVP

An open-source chat component library covering streaming and tool calls; 3–5 visually distinct preset layouts; an online theme editor that generates configs; export as React components

Revenue

Open-source core for adoption, subscription for advanced theme editor and hosting; enterprise licenses and custom theming services

Why now

LLM UIs are highly homogenized and differentiation pressure is growing; indie developers are more willing than bigcos to experiment with design, so a swappable UI layer fits the gap