Onyx (formerly Danswer)

Onyx is a leading-edge AI-powered search and knowledge management platform that leverages Retrieval-Augmented Generation (RAG) to provide direct answers based on an organization's internal data. As of 2026, Onyx has evolved into a robust middleware for enterprise intelligence, connecting natively to over 100 data sources including Slack, GitHub, Notion, and Microsoft SharePoint. Technically, Onyx distinguishes itself through its hybrid search architecture, which merges dense vector retrieval with traditional BM25 keyword matching, ensuring that both semantic intent and exact terminology are captured. The platform is designed for deep security compliance, featuring automatic permission syncing that ensures users only access information they are authorized to see in the original source systems. Positioned as the primary open-source alternative to proprietary solutions like Glean, Onyx allows for both cloud-hosted ease and self-hosted privacy, making it the preferred choice for organizations requiring high data sovereignty and model-agnostic flexibility. Its ability to swap LLM backends—from GPT-4o to locally hosted Llama 3 variants—provides a future-proof framework for enterprise AI strategy.