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14 agents · use case

Best AI agents for deep research2026

競合・技術・業界などをテーマに、複数ソースを横断した多段階リサーチを実施します。アナリストが2日かけて行う調査を、30秒〜30分で完了するAIエージェントです。

Want the technical background? Read the ディープリサーチ glossary entry →

The 14 ranked agents

Frequently asked

What is the best AI agent for deep research in 2026?+

Our top picks for deep research are NotebookLM, OpenAI Deep Research, You.com. Rankings reflect community signal, editorial Agent Rank score, and capability match against the deep research workflow.

How should I evaluate an AI agent for deep research?+

For deep research, prioritize: (1) reliability on edge cases, not just demo workflows; (2) integration with the tools you already use; (3) audit trail when the agent acts on your behalf; (4) cost per successful outcome, not cost per token. Production-grade agents publish at least their evaluation methodology.

Are there free AI agents for deep research?+

8 of the ranked agents have a free tier or are open source: NotebookLM, You.com, Perplexity Labs, Manus.

Other use cases
Best AI agents for deep research in 2026: 14 ranked · AI Agent Rank