Compare AI tools

	Perplexity S	Sudowrite S	GitHub Copilot B	Lex A
Tagline	AI search done right. Cited answers, not chat theater.	AI writing tool built specifically for fiction writers.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Google Docs with an AI collaborator baked in.
Category	research	writing	coding	writing
Pricing	Free + $20/mo Pro	$19-$59/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free + $12/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	Novelists, screenwriters, fiction short-form writers.	Teams with GitHub already. Devs who don't want to change IDEs.	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	Great enterprise story Works in your existing IDE Chat + autocomplete	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	Less agentic than Cursor/Claude Code Model quality varies	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 for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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