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GPT ResearcherDeerFlow
Free

Free and open source; you pay for any LLM or search APIs you connect.

 Free

Free to self-host; model API costs depend on the provider you use.

Web, Self-hosted, Command line Self-hosted
  • Writes cited reports from web and local sources
  • Works with many LLM providers
  • Handles long multi-step tasks with subagents
  • Sandboxes and memory built into the harness
  • Requires API keys and some setup
  • Report quality depends on the model and sources used
  • Requires running and maintaining your own deployment
  • Depends on an external or self-hosted LLM
Downloadable app, Self-hosted Self-hosted
Open source Open source
License not stated License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 26, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.