Compare AI tools

	Perplexity S	Sudowrite S	Taskade B	Lex A
Tagline	AI search done right. Cited answers, not chat theater.	AI writing tool built specifically for fiction writers.	AI project management with agents for each team.	Google Docs with an AI collaborator baked in.
Category	Research	Writing	Productivity	Writing
Pricing	Free + $20/mo Pro	$19-$59/mo	Free + $8-$20/user/mo	Free + $12/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	Novelists, screenwriters, fiction short-form writers.	Small teams wanting AI baked into project management.	Essays, long-form drafts, thinking on the page.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Brainstorm, expand, rewrite modes designed for fiction Story Bible for character + plot tracking Understands voice + tone better than generic chatbots	Custom AI agents per project Doc + tasks + kanban in one Affordable for teams	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Pricey for casual use Fiction-only focus — not for business writing	Feature sprawl AI agents need tuning to be useful	Less feature-rich than Google Docs AI ceiling below dedicated tools
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.	B-tier. Solid product but crowded market. Try it if Notion AI feels too generic.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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