Research & Knowledge.
AI agents designed to search, synthesize, and surface information from the web, academic papers, and large corpora. Ranked by aggregate score from 4 published community and editorial evaluations. Top of this catalog: Perplexity, ChatGPT Deep Research, Elicit.
8Agents
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3.9Median /10
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PerplexityEditor's pickPerplexity AI · Free (limited daily Pro searches); Pro $20/mo; Teams $40/user/mo · BrowserPerplexity is the leading AI-powered search engine and research assistant, combining real-time web search with LLM synthesis to answer questions with cited sources. Its "Pro Search" and "Deep Research" modes can autonomously browse dozens of pages and produce structured research reports. With over 15 million monthly active users, Perplexity has become the default research tool for developers, researchers, and knowledge workers.BrowserEasy setupClaude SonnetRelFitEaseCost9.01 reviews02
ChatGPT Deep ResearchOpenAI · Included in ChatGPT Plus ($20/mo) with limited monthly research queries · BrowserChatGPT Deep Research is OpenAI's autonomous research mode that browses the web, reads documents, and synthesizes multi-step analyses into comprehensive reports — often spending 5–30 minutes researching before responding. It excels at market research, competitive analysis, and literature reviews where breadth and synthesis matter more than speed. Integrated directly into ChatGPT Plus, it's the most accessible deep research tool for non-technical users.BrowserEasy setupo3RelFitEaseCost8.81 reviews03
ElicitElicit · Free (5000 papers/year); Plus $12/mo; Professional $50/mo · BrowserElicit is an AI research assistant specialized in academic literature, built to help researchers find, summarize, and extract data from scientific papers. Its "Elicit Notebook" enables systematic literature reviews by searching across 200M+ papers, extracting structured data into tables, and identifying research gaps. Elicit is the gold standard for academic researchers who need rigorous, evidence-based synthesis rather than general web search.BrowserEasy setupProprietary (Elicit models)RelFitEaseCost8.81 reviews04
GrokxAI · Basic Grok free (limited); Full access requires X Premium+ ($16/mo) or xAI API · BrowserGrok is xAI's AI assistant with exclusive real-time access to the full X (Twitter) firehose — making it uniquely capable for researching live events, trending topics, and social media sentiment. Its DeepSearch mode autonomously browses the web and X to produce comprehensive research reports. Grok's integration into X Premium has driven rapid user adoption, and its uncensored default personality makes it a polarizing but high-interest platform.BrowserEasy setupGrok 3RelFitEaseCost7.81 reviews05CConsensusConsensus · Free (20 searches/mo); Premium $8.99/mo; Teams $9.99/user/mo · BrowserConsensus is an AI search engine specifically designed to surface evidence from peer-reviewed scientific research, providing "Consensus Meters" that indicate how strongly the evidence supports a claim. Unlike general AI tools that may hallucinate citations, Consensus only references real papers and provides direct links to source documents. It is particularly valuable for health, nutrition, and science questions where evidence quality matters.BrowserEasy setupGPT-4oRelFitEaseCost0.00 reviews06
Exa AIExa · Free tier (1000 searches/mo); Pay-as-you-go $0.25/1000 requests; Enterprise custom · BrowserExa is a neural search API designed specifically for AI agents and developers, using embedding-based semantic search to find highly relevant content that keyword search misses. Unlike traditional search APIs, Exa excels at finding content that is conceptually similar rather than textually matching, making it ideal for research agents and RAG pipelines. Exa is increasingly embedded as the default web search tool in agentic frameworks like LangChain and CrewAI.BrowserEasy setupProprietary (Exa neural search models)RelFitEaseCost0.00 reviews07
Gemini Deep ResearchGoogle · Included in Gemini Advanced (Google One AI Premium $19.99/mo) · BrowserGemini Deep Research is Google's agentic research mode, leveraging Google's unmatched search index to produce detailed research reports with real-time web data. Its 1M-token context window allows it to synthesize far more source material than competitors in a single session. As a native Google product, it integrates seamlessly with Google Docs, Workspace, and Google Scholar for academic and professional research.BrowserEasy setupGemini 2.0 Flash ThinkingRelFitEaseCost0.00 reviews08
You.comYou.com · Free tier; Pro $20/mo; Team $25/user/mo · BrowserYou.com is an AI search engine and agent platform offering multiple research modes including Smart (fast web search), Research (deep multi-source analysis), and Create (content generation). Its YouAgent mode can complete multi-step tasks by combining web search, code execution, and data analysis. You.com differentiates with its privacy focus and ability to search specific apps like Reddit, GitHub, or StackOverflow.BrowserEasy setupClaudeRelFitEaseCost0.00 reviews
PerplexityEditor's pickPerplexity AI · Free (limited daily Pro searches); Pro $20/mo; Teams $40/user/mo · BrowserPerplexity is the leading AI-powered search engine and research assistant, combining real-time web search with LLM synthesis to answer questions with cited sources. Its "Pro Search" and "Deep Research" modes can autonomously browse dozens of pages and produce structured research reports. With over 15 million monthly active users, Perplexity has become the default research tool for developers, researchers, and knowledge workers.BrowserEasy setupClaude SonnetRelFitEaseCost9.01 reviews02ChatGPT Deep ResearchOpenAI · Included in ChatGPT Plus ($20/mo) with limited monthly research queries · BrowserChatGPT Deep Research is OpenAI's autonomous research mode that browses the web, reads documents, and synthesizes multi-step analyses into comprehensive reports — often spending 5–30 minutes researching before responding. It excels at market research, competitive analysis, and literature reviews where breadth and synthesis matter more than speed. Integrated directly into ChatGPT Plus, it's the most accessible deep research tool for non-technical users.BrowserEasy setupo3RelFitEaseCost8.81 reviews03ElicitElicit · Free (5000 papers/year); Plus $12/mo; Professional $50/mo · BrowserElicit is an AI research assistant specialized in academic literature, built to help researchers find, summarize, and extract data from scientific papers. Its "Elicit Notebook" enables systematic literature reviews by searching across 200M+ papers, extracting structured data into tables, and identifying research gaps. Elicit is the gold standard for academic researchers who need rigorous, evidence-based synthesis rather than general web search.BrowserEasy setupProprietary (Elicit models)RelFitEaseCost8.81 reviews04Exa AIExa · Free tier (1000 searches/mo); Pay-as-you-go $0.25/1000 requests; Enterprise custom · BrowserExa is a neural search API designed specifically for AI agents and developers, using embedding-based semantic search to find highly relevant content that keyword search misses. Unlike traditional search APIs, Exa excels at finding content that is conceptually similar rather than textually matching, making it ideal for research agents and RAG pipelines. Exa is increasingly embedded as the default web search tool in agentic frameworks like LangChain and CrewAI.BrowserEasy setupProprietary (Exa neural search models)RelFitEaseCost0.00 reviews07Gemini Deep ResearchGoogle · Included in Gemini Advanced (Google One AI Premium $19.99/mo) · BrowserGemini Deep Research is Google's agentic research mode, leveraging Google's unmatched search index to produce detailed research reports with real-time web data. Its 1M-token context window allows it to synthesize far more source material than competitors in a single session. As a native Google product, it integrates seamlessly with Google Docs, Workspace, and Google Scholar for academic and professional research.BrowserEasy setupGemini 2.0 Flash ThinkingRelFitEaseCost0.00 reviews08You.comYou.com · Free tier; Pro $20/mo; Team $25/user/mo · BrowserYou.com is an AI search engine and agent platform offering multiple research modes including Smart (fast web search), Research (deep multi-source analysis), and Create (content generation). Its YouAgent mode can complete multi-step tasks by combining web search, code execution, and data analysis. You.com differentiates with its privacy focus and ability to search specific apps like Reddit, GitHub, or StackOverflow.BrowserEasy setupClaudeRelFitEaseCost0.00 reviewsCompare ready. Start with the top 3 visible agents.Compare