Markup.io alternative
The Markup.io alternative that hands feedback to your code
Markup.io marks up websites and dozens of file types. Skyelight is built for websites and web apps: feedback is pinned to the element, carries the source file and line, and goes to Claude Code, Cursor or Codex to fix. There's a free plan, and Pro starts at $29 a month.
Free plan. Reviewers are free on every plan.
Why teams switch from Markup.io
A free plan, then $29 instead of $79
Markup.io has no free plan, and its 14-day trial needs a card. Pro starts at $79 a month for 50 MarkUps, each a website or file. Skyelight has a free plan, and Pro is $29 a month with unlimited projects and your seat included.
Code context, not just the browser
Markup.io records the reviewer's browser, operating system and screen size, with a screenshot. With Skyelight Build, every thread also carries the source file, line and commit behind the element, plus errors, console warnings and failed requests.
Built for coding agents
Markup.io has no MCP server or AI features. Skyelight's MCP server lets Claude Code, Cursor or Codex read a thread, fix it in the right file, open a pull request and reply on the thread.
Skyelight vs Markup.io
| Feature | Skyelight | Markup.io |
|---|---|---|
| Free plan | Yes, 1 project | No, 14-day trial with a card |
| Starting price | $29/mo, your seat included | $79/mo for 50 MarkUps |
| How the price grows | Per seat; unlimited projects on Pro | Per MarkUp; unlimited users |
| Free clients and reviewers | Unlimited, every plan; guests with no account on Pro | Unlimited guests with no account |
| Feedback without installing anything | Review badge, with Skyelight Build | Paste a URL |
| Source file and line on every thread | Yes, with Skyelight Build | – |
| Errors, console warnings and failed requests | Yes, with Skyelight Build | – |
| MCP server for coding agents | – | |
| Coding agent fixes it and replies on the thread | Investigate, plan or fix, with a PR | – |
| Integrations | Slack, Linear and GitHub | Slack and Teams; others through Zapier |
| Video, PDFs, Office and design files | – | |
| Sign-off from each reviewer | – |
Markup.io details are from its own website, checked October 16, 2026. A dash means we found no mention of it there. Spotted something out of date? Email support@skyelight.ai.
When Markup.io is the better choice
Markup.io is the better fit if you review videos, PDFs, Office and design files alongside websites, have a large team that would outgrow per-seat pricing, or need each reviewer to sign off separately.
Skyelight and Markup.io: common questions
For small teams, yes. Skyelight has a free plan, and Pro is $29 a month with unlimited projects, plus $9 for each extra seat. Markup.io starts at $79 a month for 50 MarkUps with unlimited users, so a large team reviewing a handful of sites may pay less there.
Yes. The Skyelight MCP server gives Claude Code, Cursor, Codex and other MCP clients each thread with its page, element and, with Skyelight Build, the source file and line. The agent can investigate, plan or fix, open a pull request and reply on the thread. Markup.io doesn't offer an MCP server.
No. Skyelight is built for websites and web apps, on the live page. If most of your reviews are PDFs, videos or design files, Markup.io covers far more formats.