AI Search Engines (2026): Perplexity, Google AI Mode, Brave & Exa

What Are AI Search Engines?

4 entries

AI search engines retrieve web or document results and use a language model to write a direct answer, usually with citations to the sources. They sit between classic search, which returns a ranked list of links, and chatbots, which answer from model memory. A second group sells search APIs that give AI agents real-time web data. Google's Search Central documentation covers how AI features in Google Search relate to website content.

01AI features and your website (Google Search Central)Google's documentation on how AI features work in Search and how to approach content inclusion in them. 02AI AssistantsChatbots, AI search, writing and coding assistants, on this site. 03AI ChatbotsChatbot and conversational AI platforms, on this site. 04Agentic AI BrowsersBrowsers with built-in AI agents, on this site.

AI Answer Engines

7 entries

Consumer and business products that answer questions with cited web results. Descriptions follow each product's own pages and are not independent evaluations.

05PerplexityDescribes itself as a free AI-powered answer engine that gives real-time answers to questions. 06ChatGPT searchOpenAI's web search inside ChatGPT, which answers with links to sources. OpenAI's help pages return 403 to automated checks, so the link may need a manual click. 07Google AI ModeGoogle's AI-powered search experience, described on Google's Search pages. 08Microsoft Copilot SearchMicrosoft's Bing page describes Copilot Search as delivering AI-powered insights and instant answers. 09Brave SearchSearch from an independent index with AI-powered answers; its site says it does no profiling. 10KagiPaid search that its site says pulls from leading search engines, re-ranks results and has no ads. 11You.comDescribes itself as AI infrastructure for accuracy and lower latency; it also offers an AI search product.

AI Research and Academic Search

2 entries

Tools that search and summarise scientific literature. Check cited papers directly before relying on a summary.

12ElicitAI research assistant that its site says helps synthesize evidence from academic papers. 13ConsensusDescribes itself as an AI academic search engine for peer-reviewed literature.

Search APIs for AI Agents

6 entries

Services that give agents and RAG applications live web search and page extraction through an API.

14ExaDescribes itself as a search API for AI agents that need real-time web data, deep research and structured content. 15TavilyDescribes itself as a real-time search engine for AI agents, with APIs for web search and content extraction. 16ParallelDescribes itself as web infrastructure for AI to search, extract, monitor and reason over information. 17LinkupDescribes itself as a web search API for AI; its benchmark and customer claims are its own. 18Brave Search APISearch API that its site says accesses an index of more than 40 billion pages. 19FirecrawlDescribes itself as a way to supply AI agents with data from the web.

Open-Source Search and Research Tools

5 entries

Self-hostable engines and research agents. Release and activity facts are from each repository's GitHub page.

20SearXNGFree internet metasearch engine that aggregates results from other search services without tracking users; AGPL-3.0, with activity in October 2026. 21Vane (formerly Perplexica)Open-source AI-powered answering engine under the MIT licence; the repository moved from Perplexica to Vane, with its last push in September 2026. 22GPT ResearcherOpen-source autonomous agent for deep research with any LLM provider; Apache-2.0, with activity in October 2026. 23MindSearchOpen-source multi-agent framework for web search from InternLM; Apache-2.0, but the last push was in July 2025, so check its activity. 24Open Deep Research (LangChain)Open-source deep research agent; the repository was archived by its owner, so it is read-only.

Frequently Asked Questions

What is an AI search engine?

A search product that retrieves web or document results and uses a language model to write a direct answer, usually with citations, instead of only returning a list of links.

How is an AI search engine different from a chatbot?

A chatbot can answer from the model's training data, while an AI search engine retrieves current sources first and cites them, which makes answers easier to check.

What are search APIs for AI agents?

Services such as Exa, Tavily, Parallel, Linkup and the Brave Search API that return live web results and extracted page content to agents and RAG applications through an API.

Can I run an AI search engine myself?

Yes. SearXNG is a self-hostable metasearch engine, and Vane (formerly Perplexica) and GPT Researcher are open-source answer and research tools. Check each repository's activity first, as some, such as Open Deep Research, are archived.

How do I get my content cited by AI search?

Google's Search Central documentation explains how its AI features in Search relate to site content; the basics are crawlable, helpful pages with clear structure. No vendor guarantees inclusion.

How current is this page?

Links were checked on 31 October 2026. ChatGPT search returns 403 to automated checks and may need a manual click. Descriptions follow each product's own pages and are not independent evaluations, and products in this area change quickly.