Slop.

That's what readers call writing a machine did for you. Co-span won't let that happen. Co-span sits in your margins, suggests edits and changes your draft only when you approve. And even then - it labels every word it added so you always know how much you wrote yourself. Start writing, free.

An AI editor that respects you as a writer.

• Nothing changes without your approval. Co-span only inserts suggestions - you decide what makes it to your final draft.
• Talk it through first. Push back, add more context, ask why, and go back and forth until Co-span's suggestion gets better. Your feedback creates a reliable context so suggestions improve as you write.
• It operates at the document level. Co-span catches inconsistencies, gaps and weak spots across your whole document, not just sentence by sentence. You can ask it to find specific patterns in an editorial pass on the entire document.
• Every word is accounted for. See exactly which words are yours and which came from Co-span.