Felo

AI search engine that answers with inline citations.

Hybrid search engine that returns synthesized answers with inline citations rather than a list of links. Ships a consumer product and the Sonar API for adding cited search to your own apps and agents.

Multi-model AI search and enterprise research agents.

You.com is an AI search and answers product offering multi-model chat over OpenAI, Anthropic, and Google models on web and mobile. It has shifted toward enterprise with ARI, a research agent that synthesizes cited reports across hundreds of sources, alongside Search and Research APIs for developers.

Open-source AI answer engine with a generative UI.

A self-hostable answer engine that returns comprehensive, cited answers with a generative UI that adapts per query rather than a list of links. It offers a Quick mode and an Adaptive multi-step research mode, saves searchable history, and is provider-agnostic across LLM and search backends. Apache-2.0, deployable to Vercel in one click, with a free hosted instance at morphic.sh.

AI search and research copilot with cited answers.

An AI search and research assistant that returns cited, fact-checked answers across the web, YouTube, and PDFs, with dedicated modes for academic literature review (Liner Scholar) and professional writing (Liner Write). It grew out of a popular web-highlighting tool and now spans browser, mobile, desktop, and a browser extension. The free tier covers everyday search; Pro unlocks more models, file uploads, and unlimited copilot use.