Exa

Exa started from the idea that search engines built for humans are a poor fit for AI systems that need precise, token-efficient context. Its core product is a search API with a large independent index, where queries can be semantic, keyword-based or configured for latency versus depth, and results come back with clean text, highlights and grounded citations rather than noisy page markup.

On top of search, Exa offers a contents endpoint for extracting page content, an agent endpoint and websets for finding sets of entities that match a description, along with monitors and integrations such as an MCP server. Search runs in tiers (roughly fast, balanced and deep) so developers can trade latency against research quality, and the same API supports verticals like code, finance, companies, people and news.

Exa markets itself to teams building AI assistants, coding agents, GTM and sales tooling, recruiting and finance research, and reports very large indexed document volumes and heavy token savings from its highlight-based content extraction. The company emphasises enterprise readiness with SOC 2 Type II, GDPR, CCPA and HIPAA-aligned controls and zero data retention options.