In this article
Title
Annot and Markup.io solve the same core problem: how do you get clients to leave contextual feedback on a live website without asking them to install a browser extension, create an account, or watch a tutorial first?
Both use a proxy approach — paste a URL, get a shareable review link, clients click anywhere on the page to leave a comment. Neither requires anything from the client before they can start. On the surface they look like the same tool.
The differences matter when you look at what happens around that core workflow: how well each tool renders complex sites, where feedback goes after a client leaves it, what you can do at each price tier, and how each fits into the way a web agency actually works.
How they both work
The setup is identical in both tools. You paste a public URL, the tool wraps your live site in a shareable review layer, and you send the link to your client. They open it in any browser, click anywhere on the page to drop a pin, and leave a comment. No login, no extension, no friction on the client side.
Both tools capture the URL and page context alongside each comment. Both support desktop and mobile review. Both show comments in a dashboard you can work through and resolve.
That's where the overlap ends.
Where they differ
Rendering on complex sites
Markup.io loads your site through its own server — which works cleanly on standard HTML pages but can produce degraded rendering on sites with custom JavaScript, WebGL, or scroll-driven animations. If your Webflow animations don't fire, or your Framer interactions don't respond, your client is commenting on a broken version of the site. The feedback you get back reflects that.
Annot renders your live site as-is. Custom code runs, WebGL loads, animations fire. Clients see and interact with the real thing, which produces more accurate feedback and fewer "is this intentional?" questions on review calls.
Breakpoint review
Both tools support reviewing at different device sizes. Markup.io lets you switch between desktop, tablet, and mobile views. Annot does the same — clients toggle between breakpoints within the same review session and leave comments at each size, so responsive feedback arrives in one place rather than scattered across separate emails.
Integrations
This is the most significant practical difference for agencies.
Markup.io connects to Slack and Zapier. Any team working in Asana, Jira, ClickUp, Linear, or Notion has to build and maintain a custom Zapier automation to get feedback into their actual workflow. That's a workaround that requires maintenance when connections break — and at $79/month, most agencies expect feedback to flow natively into their tools.
Annot integrates natively with Slack, Notion, and MCP. Comments arrive as formatted tasks in the tools you already work in, without a Zapier bridge. The MCP integration is worth calling out specifically: it connects Annot directly to AI-powered development tools like Claude Code and Cursor, so client feedback flows into your build environment rather than sitting in a separate dashboard.
Pricing structure
Markup.io has a single paid tier at $79/month with a 30-day trial that requires a credit card. There's no free plan and no lower tier for freelancers or small agencies running one or two projects.
Annot has a free plan and three paid tiers. The free plan covers one project with unlimited guest reviewers — no credit card, no time limit on comments. The Freelance plan at $9/month covers all pages on one project with Slack integration. Pro at $29/month covers three active projects with all integrations. Agency at $59/month is unlimited projects. Guest reviewers are free and unlimited on every tier.
File type support
Markup.io supports 30+ file types — websites, PDFs, images, video, and slides. If your workflow involves reviewing brand assets, campaign PDFs, and video content alongside live websites, that breadth is a genuine advantage in having one platform for everything.
Annot is focused on live website feedback. It doesn't support PDF or video review. If website feedback is the primary need, that focus keeps the experience clean. If you need multi-format review in one place, Markup.io covers more ground.
Password-protected staging
Neither tool supports password-protected URLs. Both are proxy-based, which means they can load any public site but can't authenticate through Basic Auth. If your staging workflow uses password protection, both tools have the same limitation — you'd need a script tag or extension-based tool like BugHerd or Marker.io for that use case.
Side-by-side comparison
Annot | Markup.io | |
|---|---|---|
Setup | Paste a URL | Paste a URL |
Client login | Not required | Not required |
Password-protected sites | Not supported | Not supported |
Rendering: custom JS / WebGL | Yes | Limited |
Breakpoint review | Yes | Yes |
Native PM integrations | Slack, Notion, MCP | Slack, Zapier only |
File types | Websites only | 30+ (web, PDF, video, images) |
Free plan | Yes — 1 project, unlimited guests | No |
Starting price | Free · $9/mo | $79/mo |
Trial | Free plan, no credit card | 30 days, credit card required |
Who each tool is built for
Annot is the better fit if:
Your clients are non-technical and need zero friction to leave feedback
You build on Webflow, Framer, or any stack with custom JavaScript, WebGL, or complex interactions
Your team tracks tasks in Slack, Notion, or AI-powered dev tools and you want feedback flowing there natively
You're a freelancer or small agency that needs a free plan or a lower entry price before committing
Website feedback is the primary review need and you don't need multi-format asset review
Markup.io is the better fit if:
You review multiple asset types — PDFs, images, video, and websites — and want one platform for all of it
Your sites are standard HTML without complex custom code or WebGL
You're already comfortable with Zapier for workflow automation
The $79/month price is justified by replacing multiple review tools rather than sitting alongside them
Frequently asked questions
How does Annot compare to Markup.io for Webflow builds? Annot renders Webflow's custom JavaScript, CMS-driven content, and WebGL correctly — clients see the live site as it was built. Markup.io's proxy can struggle with complex Webflow builds, producing a degraded view where interactions don't fire correctly. For Webflow teams specifically, Annot is the stronger fit.
Does Markup.io have a free plan? No. Markup.io removed its free plan in 2025. The current offering starts at $79/month with a 30-day trial requiring a credit card. Annot's free plan covers one project with unlimited guest reviewers and no time limit.
Can clients leave feedback without creating an account on either tool? Yes, on both. Annot and Markup.io both allow clients to leave feedback via a shareable link with no account or extension required.
Which tool has better integrations? Annot has native integrations with Slack, Notion, and MCP. Markup.io connects to Slack and Zapier — any other PM integration requires building a custom Zap. For agencies working in Asana, ClickUp, Linear, or Notion, Annot's native connections remove the maintenance overhead of a Zapier workaround.
What if I need to review PDFs and videos alongside websites? Markup.io is the stronger option for multi-format review — it supports 30+ file types in one platform. Annot is focused on live website feedback and doesn't support PDF or video review. If your workflow involves reviewing multiple asset types, Markup.io's breadth is a genuine advantage.
Do either of these tools work on password-protected staging? No. Both are proxy-based tools that can only load public URLs. For password-protected staging support, BugHerd (via script tag) or Marker.io (via browser extension) are the tools to evaluate — though both come with their own tradeoffs on client friction and pricing.
Looking at more options? See Website annotation tools compared: which is right for your team? for a full breakdown across six tools.