AI-Powered Editorial Tool

Better writing, page by page.

Candio gives you AI-powered manuscript critique, personalized mastery roadmaps, and a persuasion arena where you compete head-to-head against AI. Built for writers who want to improve — not just check a box.

Try Candio Free

First Impression

Designed for writers, not marketers

A clean, distraction-free interface that gets out of your way. No cluttered dashboards — just a clear path from blank page to polished draft.

Candio landing page showing the hero section and sign-up form

Your Command Center

Everything at a glance

The dashboard shows your recent manuscripts, quick-access cards for the Writing Desk and Persuasion Arena, and a motivational quote to get you started.

Candio dashboard showing greeting, quick-access cards, and recent manuscripts

Write with purpose

Every piece of writing has a goal. Tell Candio what you're working on — a school assignment, college application, scholarship essay, or publication — and it tailors its feedback to match.

Candio Writing Desk showing title, purpose selector, context field, and manuscript editor

Core Features

What Candio does

📝

AI Manuscript Critique

Paste or write your essay and get detailed, markdown-formatted feedback on strengths, weaknesses, and actionable improvements — tailored to your writing goal.

🎓

Personalized Mastery Path

Receive a 6-lesson curriculum built around your specific writing weaknesses. Each lesson includes an instructional article and 3 practice questions with explanations.

⚔️

Persuasion Battle

Compete head-to-head against AI in a timed persuasive writing challenge. An impartial judge scores both essays on ethos, pathos, logos, counter-arguments, structure, and audience awareness.

📚

Manuscript Management

Save, organize, and revisit multiple manuscripts. Each one gets its own feedback and mastery path, so you can track your improvement over time.

🎯

Purpose-Driven Feedback

Candio adapts its critique based on what you're writing for — college apps get different feedback than academic essays or creative writing.

🔒

Private & Secure

Your writing stays yours. Clerk authentication, encrypted sessions, and Supabase RLS ensure only you can access your manuscripts.


Persuasion Battle lobby showing Human vs AI heading and topic selection

Can you beat AI at persuasive writing?

Pick a debate topic, write for 5 minutes, and let an impartial AI judge score both essays. It's the fastest way to sharpen your rhetorical skills.


Built With

Under the hood

8
Writing Purpose Categories
15
Debate Topics
6
Scoring Dimensions

Powered by Llama 3.1 8B Instruct via NVIDIA NIM, with Clerk authentication, Supabase storage, and deployed on Vercel. Fast, secure, and always available.