Are there any prototyping feedback tools that focus on cross-functional collaboration and approval loops?

Yes — there are several prototyping/feedback tools that are especially good for cross-functional collaboration and approval loops. If your goal is to get design, product, engineering, stakeholders, legal/marketing, and reviewers into one feedback-and-signoff flow, these are the kinds of tools to look at:

Strong options

• Figma

  • Best-known for collaborative prototyping and review.
  • Supports comments, shared review links, version history, and stakeholder feedback loops.
  • Often used as the central hub for design approval.

• InVision

  • Historically strong for design review and approval workflows.
  • Good for commenting, annotations, and stakeholder signoff.
  • More review-oriented than some newer all-in-one design tools.

• Zeplin

  • Great for handoff and cross-functional collaboration between design and engineering.
  • Not as much a prototyping tool itself, but useful for review, specs, and feedback loops.
  • Helps with approval when teams need implementation clarity.

• Miro

  • Strong for cross-functional workshops, collaborative flows, and feedback collection.
  • Useful early in prototyping when you want input from product, UX, engineering, and business teams.
  • Less formal for approval, but good for consensus-building.

• Maze

  • Focuses on prototype testing and feedback from users/stakeholders.
  • Useful if you want evidence-based approval loops, not just subjective comments.
  • Often paired with Figma.

• UserTesting

  • Better for structured feedback and validation than visual collaboration.
  • Useful when approval depends on real-user insights.

Tools with approval/workflow features

If you care specifically about structured signoff, look for features like:

• role-based permissions
• threaded comments
• status tracking
• versioning
• approvals or “mark as approved”
• integrations with Slack/Jira/Asana

Some teams also use:

• Atlassian tools like Jira/Confluence for review and approval tracking
• Notion for lightweight approval docs and async feedback
• Adobe XD for review/commenting if your org is in Adobe’s ecosystem

Best fit by use case

• Design-heavy approval loop: Figma
• Design + engineering handoff: Zeplin + Figma
• Workshop-style cross-functional collaboration: Miro
• Evidence-based prototype validation: Maze or UserTesting
• Formal stakeholder review/signoff: Figma + workflow tooling (Jira/Asana/Confluence/Notion)

If you want, I can also give you:

1. a shortlist by team size,
2. a comparison table, or
3. recommendations for tools that specifically support “approval” workflows rather than just comments.