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Linkup

Linkup builds a production-grade web search API that grounds LLM responses in live web content with citations, with offices in Paris and New York.

Linkup is a search-infrastructure company founded in 2024 that builds a production-grade web search API for AI applications. The company's product, the Linkup Web Search API, is designed to serve as the search layer beneath large language models, letting them ground responses in live web content with proper citations. It returns results in under a second, and supports customizable indexing and source control.

The technology sits at the intersection of several domains: web search infrastructure, LLM grounding and retrieval, and search APIs built specifically for AI. Customers use it in legal AI, research copilots, sales agents, voice applications, financial services and enterprise AI more broadly. The company reports that its customer base includes AI labs and Fortune 500 firms, and it holds SOC 2 Type II compliance, with an emphasis on reliability, accuracy and trust.

Linkup raised $10m in seed funding. The company is headquartered in Paris and maintains an office in New York. It describes its ambition as becoming foundational infrastructure for AI-native applications.

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