# AIKO > Free open-source AI companion with Live2D animations, voice synthesis, memory, and custom personas. ## The App - [AIKO Web App](/app) — Browser-based AI companion: Live2D character rendering, real AI chat via the free AIKO Cloud gateway (BYOK: OpenRouter / Groq / OpenAI-compatible), local Kokoro TTS + TikTok TTS + browser fallback voice, conversation memory with rolling summaries, and fully customizable personas. - [Documentation](/app/docs) — Guides for models, voice, providers, memory, settings, and troubleshooting. ## Key Facts - No sign-up, no email, no login. Conversations and settings live in your own browser. - 56 built-in Live2D models, all served locally — no external CDNs. - Free AI model and free text-to-speech included for guests. - 50+ response languages with UI translation. - Ambient mode: the AI speaks unprompted during silence. - No backend for your data: conversations, settings and memory stay in your browser's own storage. - Guest chat is answered through the free shared AIKO Cloud gateway; add your own OpenRouter / Groq / OpenAI-compatible key to talk directly to your chosen provider. ## Useful URLs - Web App: /app - Docs: /app/docs - Models guide: /app/docs/models.html - Voice guide: /app/docs/voice.html - Providers guide: /app/docs/providers.html - Help & Tutorial: /app/docs/help.html