Brave Search (Leo + Summarizer)

Brave Search is an independent search engine built by the team behind the Brave browser, designed to provide private, Big Tech–independent search with modern AI features on top of its own web index. Its standout capabilities include an AI-powered Summarizer that appears at the top of many result pages, giving a brief, citation-rich overview of answers grounded in Brave’s index rather than in third-party search backends. This summarization is integrated directly into the familiar search interface, alongside traditional web, image, video, and news tabs. The Summarizer and related AI features are powered by Brave’s own models trained over its web index and enriched by data from the privacy-preserving Web Discovery Project, where opted-in Brave browser users anonymously contribute aggregated browsing and search data to keep the index fresh and representative. This allows Brave to answer many informational queries with concise, sourced paragraphs, while still exposing the underlying links and letting users drill down into primary sources. Leo, Brave’s AI assistant available in the Brave browser, can build on this foundation by letting users ask follow-up questions, refine searches, or generate additional context using the same private-by-default approach. Privacy and independence are core differentiators. Brave Search does not profile users, does not rely on Google or Bing indexes, and supports Zero Data Retention in its developer-facing Search API. The search stack is powered by an index of tens of billions of pages that is continually refreshed, aiming to provide competitive quality without the typical tracking and ad-tech profile building associated with mainstream search engines. For users who want a cleaner experience, Brave offers Brave Search Premium: a paid subscription that removes search ads and financially supports the development of private, independent search. Brave Search is available for free on the web and as the default search option in the Brave browser on desktop and mobile. Users can access AI-generated answer summaries without creating an account, and can optionally sign in with a Brave account to manage premium subscriptions and sync settings across devices. Developers who want deeper integration with Brave’s AI-grounded answers can use the separate Brave Search API and its Answers endpoints, but for end users, the core experience is simply typing queries into Brave Search and receiving both traditional results and AI-generated summaries with citations.

• ✓Use AI summaries to quickly understand complex technical or academic topics with cited sources
• ✓Ask Leo follow-up questions on a results page to clarify concepts or reformat information into notes or outlines
• ✓Compare software tools, products, or services using grounded summaries that link back to original reviews and docs
• ✓Scan news events and controversies through multi-source summaries, then dive into primary articles via citations
• ✓Draft research starting points by combining traditional search filters with AI summaries and Leo-generated overviews

Start by entering a query at search.brave.com; when a Summarizer box appears at the top, scan the cited overview to get a quick understanding and click citations to verify or deepen reading. For more nuanced questions, open Leo from the search interface or Brave browser sidebar and ask follow-up questions that reference the current page or query (e.g., “Compare the top three options mentioned above”); phrase prompts clearly about what format you want (bullet list, pros/cons, study guide) to improve results. Use Brave’s normal search filters and Goggles with the Summarizer to narrow sources or perspectives before asking Leo to refine or explain them. For sensitive or confidential topics, avoid pasting private data into queries, as Brave is privacy-focused but still works over an external web index and models. If you need programmatic access or want to embed similar functionality into your own app, use the separate Brave Search API products rather than scraping the Leo or Summarizer UI.

Summaries and Leo answers depend on Brave’s index coverage and can miss niche or very recent information compared with larger incumbents; the Summarizer does not appear for every query, especially highly specific or low-signal ones. As with any LLM-backed system, Leo can hallucinate or overgeneralize and should not be treated as authoritative for medical, legal, or financial decisions; citations help but do not guarantee correctness. Heavy Leo usage and fully ad-free search require a paid subscription, and there is no public consumer API for Leo itself. Some advanced search features and AI behavior are optimized for use inside the Brave browser, so the experience can differ slightly in other browsers. Commercial reuse of structured outputs at scale generally requires using the Brave Search API under separate terms.