Best Deep Research AI tools
Runs long, multi-source investigations and returns a cited report rather than a single quick answer. The 10 highest-ranked of the 10 apps tagged Deep Research in the Onei AI catalogue.
Everything tagged Deep Research: apps, skills and MCP servers
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Manus AI
A general autonomous AI agent that executes multi-step tasks end to end in its own cloud environment.
Editor's pick
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Moonshot AI
Moonshot AI's assistant, known for very long context windows and strong agentic coding and research workflows.
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AI for systematic literature review — search 125 million papers, extract data into tables, and screen at scale.
Also: Citations, Literature Review, Research · Editor's pick
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Deep-research AI agent that builds cited reports or structured datasets, scaling depth to your budget.
Also: Citations, Research, Web Search · Editor's pick
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Consensus responsibly uses AI to help you conduct research faster.
Also: Citations, Literature Review
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Perplexity AI
A web search engine that uses a large language model to process queries and synthesize responses based on web search results.
Also: Chatbot, Citations, Web Search
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You.com sells web search, content extraction, answer and research APIs for AI agents; its consumer chat closed to new users in 2026.
Also: Web Search
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Advait Paliwal
Open-source AI research agent with a CLI and a local science workbench for deep literature review, paper retrieval and replication planning.
Also: Literature Review
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A deep-search research assistant that reads full papers, not abstracts, to find work others miss.
Also: Citations, Literature Review, Research
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xAI
Grok is a free AI assistant designed by xAI to maximize truth and objectivity. Grok offers real-time search, image generation, trend analysis, and more.
Also: Chatbot, Web Search
How this list is ranked
Ranked by editorial weight (0–100), plus 5 points per bookmark up to 10, plus or minus up to 20 for the average review rating; ties go to featured apps, then the most recently updated. Discontinued apps are never ranked.