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Exa

Freemium
search apiaillmsemantic searchdeveloper toolragweb scrapingdata extractionapi

An AI-native search engine API that enables developers to build applications that understand complex queries and find relevant information based on conceptual meaning rather than just keywords.

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Exa provides a developer-focused search API designed to power AI agents and applications, formerly known as Metaphor Systems. Unlike traditional keyword-based search, Exa uses neural models to understand the semantic meaning behind complex, natural language queries. It serves developers and companies building AI products, particularly those utilizing Retrieval-Augmented Generation (RAG) workflows. Exa's unique value is its ability to find highly relevant content from specified domains or the open web and return it in a clean, structured format for LLMs to consume. This allows for the creation of more knowledgeable and capable AI systems that can reason with up-to-date information.

Pros

  • Performs semantic, meaning-based search instead of just keyword matching.
  • API-first design with clean, predictable JSON responses.
  • Specialized 'findSimilar' endpoint to find canonical content based on a single example URL.
  • Retrieves clean text and HTML content from links, removing boilerplate for easy LLM ingestion.
  • Allows searching within a predefined set of web pages or domains.

Cons

  • Pricing can become expensive for very high-volume applications.
  • The conceptual search model can be less predictable than traditional keyword search for certain queries.
  • Requires a developer to integrate; not a consumer-facing search engine.
  • As a relatively new company, it has a shorter track record than established search API providers.

Key features

  • Semantic Search API
  • Find Similar Pages API
  • Get Contents API for extracting clean text/HTML
  • Ability to search within specific domains or URLs
  • Autoprompt feature for query enhancement
  • Traditional keyword search mode available
  • Support for highlighting searched content in results

Integrations

Python Client LibraryJavaScript/TypeScript Client LibraryLangChainLlamaIndexREST APIGo (Community Library)Ruby (Community Library)

Target audience

Developers, AI engineers, and companies building AI-powered applications, especially those requiring advanced search and Retrieval-Augmented Generation (RAG) capabilities.

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Founded

2022

Headquarters

San Francisco, USA

Pricing Tiers

Wake

For hacking and personal projects. Includes 1,000 mixed API units (search/findSimilar/contents) per month.

Free

Soar

For production applications. Starting at $50/month which includes a number of queries and content calls. Pricing is usage-based beyond the initial included amount.

$50/mo

Enterprise

For large-scale needs. Includes custom models and limits, private deployments, and priority support.

Custom

Frequently Asked Questions

Top Alternatives to Exa

Tavily AI

Also built specifically for LLM agents, Tavily focuses on providing concise, optimized search results for fast and efficient RAG.

Perplexity API

Offers access to a powerful answer engine that synthesizes information from search results, providing direct answers rather than just a list of links.

Google Search API

A highly reliable and scalable API for traditional, keyword-based search, better suited for applications where precise keyword matching is the primary goal.

You.com API

Provides access to a multimodal search engine with specific modes for AI, offering a blend of web results, code snippets, and other data types.

Ready to get started?

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