Compare AI tools

	Claude Agent SDK S	Cursor S	Perplexity S	Fathom S
Tagline	Anthropic's SDK for building your own agents on Claude.	VS Code fork that made AI coding actually work.	AI search done right. Cited answers, not chat theater.	Meeting notes, free forever for individuals.
Category	Agents	Coding	Research	Meetings
Pricing	API usage + SDK is free	Free + $20/mo Pro + $40/mo Business	Free + $20/mo Pro	Free for individuals + $15-$29/user/mo teams
Best for	Developers building custom agents for their own company/product.	Developers. Non-developers who want to ship working code.	Replacing Google for any question where you want a cited answer in seconds.	Solo operators, freelancers, small teams on a budget.
Strengths	Production-grade agent primitives Built on Claude (best reasoning) Full control — build exactly what you need	Tab completion feels like mind-reading Composer for multi-file edits Runs Claude, GPT, Gemini — you pick	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Unlimited free tier for solo use Strong summaries + action items Works in Zoom, Meet, Teams
Weaknesses	Developer-only You build the UI	Can feel overwhelming for non-coders Expensive at scale	Not a general chatbot Answers can be shallow on complex topics	Bot-joining model Team features gated
Kai's verdict	S-tier for builders. The right primitives. What Kai is built on under the hood.	S-tier for coding. If you write code of any kind, this pays back the $20 in a day.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for solo + free. The best free option, hands down.
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