Quora

Quora is an online question-and-answer platform that enables users to pose questions, provide answers, comment on responses, and vote content up or down based on usefulness. The service covers a broad range of topics, from technology and science to personal advice and entertainment, and is accessible via web browsers and mobile applications. Users can follow specific topics, individuals, or spaces to curate a personalized feed of content. The platform emphasizes real‑name participation and community‑driven moderation to promote reliable information. Quora serves a global audience, with content available in multiple languages though English remains the primary language of interaction.

The company was founded in 2009 by Adam D'Angelo, former Facebook CTO, and Charlie Cheever, and is headquartered in Mountain View, California, United States. Over its history Quora has attracted significant venture‑capital investment from firms such as Peter Thiel’s Founders Fund, Benchmark, and Tiger Global Management. These investments have supported product development, infrastructure scaling, and international expansion. While exact user numbers are not disclosed in the provided sources, public reports indicate that the platform reaches hundreds of millions of monthly visitors worldwide.

Quora distinguishes itself by focusing on depth and expertise rather than brevity, encouraging long‑form answers that cite personal experience or authoritative sources. The platform employs a combination of algorithmic ranking and human moderation to surface high‑quality content and to reduce spam or misleading information. Its reputation system, based on upvotes and downvotes, helps surface credible contributors and allows users to build expertise profiles within specific niches. These design choices position Quora as a knowledge‑sharing community rather than a simple social network.

Regarding the security incident noted in the context, on November 30, 2018 Quora disclosed that an unauthorized third party accessed its systems, compromising data of approximately 100 million users, including names, email addresses, encrypted passwords, and both public and non‑public interactions. The breach prompted immediate containment, forensic investigation, and user notification, underscoring the company’s ongoing emphasis on protecting user information. Quora remains a privately held company, with ownership retained by its founders and early investors, and it has not undergone an initial public offering or been acquired by another entity.