Exa

AI-powered search engine for developers and researchers.

Overview

Exa is an AI-powered search engine and API designed for developers who need better, cleaner, and more relevant web data than traditional search engines provide. It allows you to search, retrieve, and rank web content specifically optimized for use in AI applications like chatbots, agents, and retrieval-augmented generation (RAG).

Key features

Multiple search types optimized for different latencies (instant, fast, deep, deep-reasoning)
Token-efficient content extraction with AI-powered highlights
Structured output generation with JSON schema support
Specialized indexes for companies, people, publications, and code
Sub-200ms latency for real-time applications
Web-scale index with 580B+ documents and 1.4T+ URLs
Zero Data Retention option for enterprise privacy
Grounded citations and multi-step reasoning capabilities

Pros

Best-in-class accuracy on demanding retrieval benchmarks
Fastest latency in the industry (under 180ms for instant search)
10x token efficiency compared to full-page content
Purpose-built for AI agents rather than retrofitted for them
Comprehensive category-specific search (companies, people, code, publications)
Flexible pricing with pay-as-you-go and enterprise options
Strong developer experience with SDKs and integrations

Cons

Requires API key and integration work (though dashboard onboarding helps)
Pricing scales with usage, which can be expensive for high-volume applications
Specialized for AI use cases; less suitable for traditional web search needs
Enterprise features require contacting sales

Use this if

You're building AI agents, coding assistants, or LLM applications that need real-time web data, structured information extraction, or deep research capabilities. Ideal for applications requiring low-latency search, token efficiency, or specialized searches across code repositories, companies, or people.

Skip this if

You need traditional web search for human users, don't require real-time data, or are building applications that don't involve AI agents or LLMs. Also skip if you need a completely free solution without usage limits.

Best for

AI agents and coding assistants needing real-time web contextLLM applications requiring structured data extractionDeep research and multi-step reasoning tasksCompany and people enrichment at scaleCode repository and documentation search