Reviewer vs Markup.io: 2026 Comparison

Detailed Breakdown

Visual Annotations

Both Reviewer and Markup.io let reviewers pin comments on images. Reviewer uses a clean pin-and-comment system with support for arrows and rectangles. Markup.io offers similar annotation tools with additional markup options for websites.

For image-based feedback, both tools work well. The difference comes down to workflow: Reviewer requires zero signup for reviewers, while Markup.io needs accounts for full access.

A/B Comparison

This is where Reviewer stands out. Reviewer’s A/B comparison mode lets you upload multiple design variations and have reviewers pick their preferences from a side-by-side grid. Markup.io doesn’t offer this feature.

If you regularly present design options to clients or stakeholders, this is a significant advantage.

Approval Workflows

Reviewer has a dedicated approval workflow where reviewers approve or reject each asset individually. It’s straightforward: yes or no on each design.

Markup.io offers approval features within their paid plans, but the workflow is more integrated into their broader project management approach.

Website Feedback

This is Markup.io’s strength. Markup.io lets reviewers annotate live websites directly in the browser — clicking on elements, leaving comments on specific page sections. Reviewer doesn’t support website feedback; it focuses on uploaded images and videos.

If website feedback is your primary need, Markup.io is the better choice here.

Integrations

Markup.io connects with Slack, Trello, Asana, and other project management tools. Reviewer keeps things simple with a standalone feedback loop — no integrations, but also no configuration needed.

Pricing Comparison

Reviewer: Free. All features, no limits, no credit card. No signup required for reviewers.

Markup.io: Free tier available with limitations. Paid plans start at around $19/month for teams. Full features require a paid subscription.

Which Should You Choose?

Choose Reviewer if:

• You want a completely free tool with no limits
• Your reviewers shouldn’t need to create accounts
• You need A/B comparison for design variations
• Simplicity matters more than integrations

Choose Markup.io if:

• You need to annotate live websites
• You want integrations with project management tools
• Your team is already in the Markup.io ecosystem

For most designers and agencies doing image-based feedback, Reviewer gets the job done with zero friction and zero cost.