Compare AI tools

	Lex A	Cline A	Hume AI A	Perplexity S
Tagline	Google Docs with an AI collaborator baked in.	Open-source VS Code agent. Reads + writes + runs.	Voice AI that reads + expresses emotion.	AI search done right. Cited answers, not chat theater.
Category	Writing	Coding	Voice	Research
Pricing	Free + $12/mo	Free (open source) + your API costs	Free tier + pay-as-you-go	Free + $20/mo Pro
Best for	Essays, long-form drafts, thinking on the page.	VS Code users who want agentic coding without changing IDEs.	Therapy apps, customer service, any voice agent where emotion matters.	Replacing Google for any question where you want a cited answer in seconds.
Strengths	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	Free extension for VS Code Plan + Act modes Model-agnostic (Claude, GPT, local) Sees terminal output and iterates	Detects + mirrors emotional tone EVI (Empathic Voice Interface) feels different Expressive voice output	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context
Weaknesses	Less feature-rich than Google Docs AI ceiling below dedicated tools	Can burn tokens fast if not watched Less polished than Cursor	Niche use case Pricing ramps fast	Not a general chatbot Answers can be shallow on complex topics
Kai's verdict	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	A-tier. Best free agentic option in VS Code. Use with Claude for best results.	A-tier in its niche. The only one that actually gets emotion right.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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