Kiyub

Overview

A full-stack AI chat app that runs on one API key. Web client, native mobile client, and a real-time backend, all built around a single LLM gateway so a self-hoster can clone, set one env var, and have their own ChatGPT-alternative running in minutes.

Kiyub is an open-source chat product with productivity surfaces beyond plain conversation: Projects (scoped workspaces with their own files and system prompts), Canvas (a drag-and-drop card graph for non-linear thinking), and Tests (auto-generated quizzes from uploaded documents). No accounts, no analytics vendor, just the app.

Features

• Streaming chat with multi-step reasoning display and inline citations.
• Native web search via OpenRouter's :online suffix, no separate search key.
• Multimodal attachments (images, PDFs, Word docs, audio) processed through OpenRouter.
• Projects: system-prompt-scoped workspaces with per-project files and instructions.
• Canvas: drag-and-drop card graph with typed connections for spatial conversations.
• Test generation: upload a document, get a graded quiz with score tracking.
• Highlight-to-chat: select any text to open a contextual quick-question popup.
• Usage dashboard: token spend, cost, and breakdown by model and usage type.
• Native mobile app (iOS and Android) sharing types and chat pipeline with the web.

Highlights

• One API key, every feature: consolidated five external services into a single OpenRouter gateway, with routing decisions handled server-side in one provider abstraction.
• Refactored from multi-tenant SaaS to single-tenant OSS in a single coordinated pass: ~90 files touched, schema migrated, build kept green throughout.
• Real-time-reactive by default: Convex subscriptions keep conversations, canvas cards, usage metrics, and test progress live without websocket plumbing.
• Shared types across web, mobile, and server, so a schema change triggers compile errors everywhere instead of silent drift.

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