Last updated: 2026-05-11
Best AI Agent Tools for Research Agents
Tools for research agents that retrieve sources, plan multi-step investigation, and leave a traceable decision trail.
Use LlamaIndex for source retrieval, LangGraph when state and retries matter, and LangSmith when research quality needs reviewable traces.
Task fit
Combine retrieval with explicit state control when the agent must search, judge evidence, and decide whether to continue.