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S
Cline
A
Devin
A
TaglineAI search done right. Cited answers, not chat theater.Open-source VS Code agent. Reads + writes + runs.Cognition Labs' autonomous coding engineer.
Categoryresearchcodingagents
PricingFree + $20/mo ProFree (open source) + your API costs$500/mo
Best forReplacing Google for any question where you want a cited answer in seconds.VS Code users who want agentic coding without changing IDEs.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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