May 28, 2026 · 4 min read · Philip, founder
Redline vs Markup.io: which one is for you?
Both tools live in the design-feedback corner of the internet. They're built for different people. Here's how to tell which one fits.
Markup.io is one of the better-known feedback tools out there. It's been around for years, supports a long list of file types — websites, PDFs, images, video, design files — and is built for creative teams that need a single review layer across everything they ship. If you're at an agency running a quarterly campaign that spans a microsite, three videos, a brand book PDF and a stack of social cuts, Markup is built for that day.
Redline is built for a different person. You're a freelancer. You're not reviewing a campaign — you're reviewing a website. You have one or two clients in flight, you want to send a link, get pins, get approval, invoice, move on. The whole job is making the website-feedback loop disappear so you can get paid. Everything else is noise.
So the practical differences come down to three things: scope, pricing, and what the workflow assumes about you.
Scope. Markup handles a long menu of file types. Redline is a website tool. If you also need to review PDFs and video with the same tool, you'll outgrow Redline fast. If you mostly need clients pinning on the live site you just deployed, the broader tool is more surface area than the job calls for, and the website-review flow is one tab among many.
Pricing. Markup is tiered the way most SaaS is — plans that climb with seats, features and reviewer counts. Redline is a single $9/month tier, with a free tier for your first active project. No 'Pro vs Business vs Enterprise' ladder, no per-seat math when you add a second client. The reason for the difference is just who each tool is priced for. Theirs makes sense for a team. Ours makes sense for one person paying out of pocket between projects.
What the workflow assumes. Markup assumes a team — internal reviewers, external clients, role-based access, an approval chain. Redline assumes you. You send a link. The client opens it without making an account. They pin and comment directly on the live site. You fix and resolve. They hit one button to approve, and you get a time-stamped sign-off attached to the version they actually saw. No roles, no chain, no seats.
The honest read: if you're an agency running multi-asset reviews with internal stakeholders, look at Markup — that's the shape of tool they've built. If you're one person handing off a Webflow, Framer or custom site to a client and you want the feedback loop to take five seconds to set up, Redline is the simpler tool.
Either way, the worst option is the one most freelancers default to — screenshots in Slack, edits over email, 'this needs to be a bit more centered' with no one quite sure what got approved. Whichever tool you pick, picking one beats not picking one. — Philip