Exa AI

What is Exa AI?

Exa AI (formerly Metaphor) is a semantic neural search API designed specifically for developers and AI applications. Unlike keyword-based search APIs, Exa uses neural embedding technology to find web content based on meaning and concepts — enabling AI agents and applications to retrieve the most relevant, high-quality web content for any topic or question.

Neural Web Search for AI Applications

Exa's primary value is as a tool for developers building AI-powered applications that need to search the web. While traditional search APIs return keyword-matched results, Exa finds content by meaning — making it significantly better at finding the most relevant sources for research tasks, AI agent workflows, and content discovery applications. It offers content retrieval, auto-search, and similarity search capabilities.

• Neural semantic search across the web by meaning, not keywords
• Developer-focused REST API
• Content retrieval with full-text extraction
• Similarity search to find content related to a given URL
• Auto-search for converting natural language queries to searches

Who Uses Exa AI

Exa AI is used by developers building AI agents, research tools, content discovery applications, and RAG (Retrieval-Augmented Generation) pipelines that require high-quality web search grounded in semantic understanding rather than keyword matching.