Heida

Heida is a comprehensive AI interface designed for professionals to interact with multiple AI models through one elegant platform. It supports connection to 220+ AI models including OpenRouter models, Claude, and GPT-4 while allowing users to use their own API keys for cost control. The platform features document intelligence for analyzing PDFs and spreadsheets, interactive tools for visualizations and code execution, AI augmentation with web search capabilities, and a knowledge graph for persistent memory across conversations. Built with enterprise-grade security including end-to-end encryption.