The writing editor
that thinks with you.
Copen helps you find the idea, develop the thought and challenge your argument — so what you publish still sounds exactly like you.
I thought launching our product would be the hardest part. I was wrong.
Let's explore this idea
How it works
From a half-formed thought to a piece you're proud of.
Capture the thought
Start with a sentence, a hunch or something that happened today. No outline needed.
Find the angle
Copen shows you the interesting directions hiding inside what you wrote.
Write it your way
You write the piece. Copen stays quiet until you ask for a hand.
Challenge & polish
Weak claims get questioned, sentences get tighter — and your voice stays yours.
A thinking partner
Someone to think with, right beside your page.
Open the chat whenever you're stuck. Copen has read your draft, so you can ask it anything — without copy-pasting a thing.
- Ask about a highlighted sentence or the whole piece
- Get angles, questions and honest feedback
- Nothing lands in your draft unless you choose it
Challenge
It pushes back when it should.
Most tools just make your writing sound confident. Copen points out the claims that need proof and the logic that needs one more step.
- Unsupported claims, vague language, missing context
- Every note points to the exact words it's about
- Dismiss anything you disagree with
“Nobody” is doing a lot of work here.
How did you find out? A number — even a rough one — would make this land.
Version history
Every draft, safely kept.
Copen quietly saves versions as you write. Compare any two and see exactly what changed — then bring back the one you liked.
- Automatic versions, plus ones you name yourself
- See added and removed words at a glance
- Restoring never loses what you have now
Now
Editing
Before the rewrite
Yesterday
First draft
Mon
I thought launching would be the hardest part. It was fine. I was wrong. The hard part came after.
Restore this versionOrganised
Group your writing the way you think.
Keep a launch story, a newsletter and your half-finished ideas in their own folders. Drag a page in, and it's filed.
- Folders for every project
- Drag and drop pages between them
- Everything searchable from the sidebar
Documents
Launch story
The hardest part
Your rules
You decide how Copen helps.
Want to be challenged but not rewritten? Want angles and nothing else? Switch each kind of suggestion on or off — Copen only speaks up about what you asked for.
Suggestions
Fix mistakes
Spelling, grammar and wrong words
Challenge my ideas
Question claims and weak logic
Find stronger angles
Sharper ways into the idea
Spot what's missing
Context a reader would need
Suggest examples
Make abstract points concrete
Beyond the page
Think in pictures, too.
Whiteboards
Map an argument, sketch a structure or cluster your notes on an open canvas — right next to your pages, in the same folders.
“A small team crossing out job titles…”
Images, yours or generated
Drop in your own photos and screenshots — or describe the picture your piece needs, pick a style, and let Copen draw it. No stock-photo hunting.
Pricing
Write for free. Think further with Pro.
The editor is yours at no cost. Copen's AI is one simple plan — monthly or yearly, cancel anytime.
Free
A calm place to write.
$0/ forever
No card needed
- Unlimited pages and folders
- Whiteboards
- Upload your own images
- Version history and restore
- Export to Markdown
Copen Pro
All of CopenA thinking partner beside every page.
$12/ month
Billed monthly · cancel anytime
- Everything in Free
- Chat with Copen about any draft
- Suggestions that challenge your ideas
- Angles, gaps and clearer lines
- Spelling and grammar fixes
- Watch while you write
- Generated illustrations for your pages
Cancel anytime · Secure checkout by Polar
Our promise
Better writing that's still unmistakably yours.
You stay the author
The ideas, opinions and final words are yours. Copen helps you get there — it doesn't write for you.
Suggestions, never silent rewrites
Every change is proposed, never applied behind your back. You accept it, edit it or ignore it.
Quiet until you ask
No pop-ups, no ghost text. A clean page, and help one shortcut away when you want it.
Made for people with something to say.
Founders
“Why we almost didn't launch”
Developers
“What I learned rebuilding our API”
Creators
“The newsletter I rewrote five times”
Professionals
“The proposal that finally got a yes”
Questions, answered.
What's free, and what's in Copen Pro?
Writing is free: pages, folders, whiteboards, image uploads, version history and export. Copen Pro adds everything that uses AI — the chat, suggestions, challenges, angles, spelling and grammar fixes, watch-while-you-write and generated illustrations.
Can I cancel anytime?
Yes. Cancel from your account menu in a couple of clicks; you keep Pro until the end of the month you've paid for, and your writing always stays yours.
Does Copen write for me?
No — and that's the point. Copen helps you find what you want to say, questions weak spots and offers small edits you can accept or ignore. The piece stays yours.
Will my writing sound like AI?
Copen is built to protect your voice. Suggestions follow how you write, and you can ask it to flag any line that doesn't sound like you.
Can I go back to an earlier draft?
Yes. Copen saves versions as you write, and you can name your own. Compare any version with what you have now and restore it in one click — your current draft is kept too.
Can I choose what kind of feedback I get?
Yes. In Settings you switch each kind of suggestion on or off — fixing mistakes, challenges, angles, missing context, clarity, examples, voice and structure.
How do I get my writing out?
Copy it or export it as Markdown, ready for your blog, newsletter or LinkedIn.
“I wrote this. Copen helped me make it better.”
That's the feeling we're building for. Come write something you actually mean.
Start writing