Deep Research

ChatGPT Deep Research

OpenAI's cited, multi-step research agent inside ChatGPT

Flowith

Infinite-canvas AI workspace where Agent Neo chains 1,000+ steps.

Gemini Deep Research

Autonomous web research baked into Gemini, not sold on its own

Parallel

Pay-per-query web research APIs built for AI agents

Undermind

Deep AI literature search that trades speed for near-total recall