The redline is sacred.

Most software for design feedback is loud. Notification badges, comment counts, real-time cursors arguing over a button label, Slack threads sliding past midnight. Each one engineered to make you feel that someone is waiting on you.

Design doesn’t happen in chat. It happens when one person sits down with a problem and a canvas, and a client — once — says this part, here, doesn’t feel right.

Redline is built for that moment. One mark. One concern. One thread. The client doesn’t need an account, an install, or a tutorial. The designer doesn’t need a notification. Comments accumulate at the client’s pace; the designer reads them at their own.

The colour red appears nowhere else in this product. Not in errors, not in onboarding, not in CTAs. We’ve reserved it for the one gesture that matters: the redline a client leaves on your work.

Everything else is a hairline, a quiet typographic shift, a number set in mono. Studio software for studios that already know how to look at a thing and decide if it’s right.

Send the link. Get the redlines back. That’s it.