MeetLeo (Brave Leo AI)

MeetLeo (Leo) is the native AI assistant developed by Brave Software, integrated directly into the Brave browser architecture. Unlike standard extensions, Leo operates with a privacy-first engineering focus, utilizing an anonymized proxy server to ensure that user prompts are never linked to IP addresses or stored for model training. By 2026, Leo has evolved into a multi-model orchestrator, allowing users to toggle between Llama 3, Mixtral 8x7B, and Claude 3.5 Sonnet depending on the task complexity. Technically, it leverages Retrieval-Augmented Generation (RAG) to process the active Document Object Model (DOM) of the current tab, enabling high-fidelity summarization, real-time translation, and code analysis without data leaving the local context in an identifiable way. Its market position is unique as it bypasses the friction of third-party logins, providing immediate utility to over 60 million Brave users. For developers and researchers, Leo offers a sandbox-like environment to interact with web data through natural language, effectively turning every URL into a queryable database while maintaining a zero-knowledge security posture.