Are there any whiteboarding software tools that support project signoff workflows and collaboration without live meetings?

Yes. A few whiteboarding/collaboration tools support asynchronous review, comments, approvals, and signoff-style workflows so teams can collaborate without live meetings.

Good options to look at

1) Miro

• Strong for collaborative whiteboards
• Supports comments, mentions, voting, and async feedback
• Can be combined with templates and approval processes
• Often used with integrations like Jira, Slack, Microsoft Teams, and document workflows

2) Lucidspark / Lucidchart

• Whiteboarding plus diagramming
• Good for structured collaboration and review
• Supports comments and team workflows
• Better if your “signoff” is tied to diagrams, process maps, or documentation

3) FigJam

• Lightweight whiteboarding with async collaboration
• Comments, cursorless collaboration, and easy sharing
• Often paired with Figma for design signoff workflows
• Best for product/design teams

4) Microsoft Whiteboard + Teams

• Useful if your org is already in Microsoft 365
• Collaboration can happen asynchronously through Teams and linked docs
• Approval/signoff is usually handled through Teams/SharePoint/Power Automate rather than Whiteboard alone

5) Mural

• Designed for workshop and team collaboration
• Supports comments, reactions, voting, and async participation
• Can work well for review cycles before formal approval elsewhere

Important note

Most whiteboarding tools don’t have fully native “project signoff” workflows in the same way a document approval system does. Usually, teams handle signoff by combining:

• whiteboard comments/mentions
• version history
• export to PDF or doc
• approval tools like Approvals in Teams, Jira workflows, Asana approvals, ClickUp, Adobe Sign, DocuSign, or Power Automate

If you need true signoff workflow

If your main requirement is approval routing, audit trail, and explicit signoff, consider tools that combine whiteboarding with workflow management, or use a whiteboard plus a separate approval system.

Best fit by use case

• Design/product collaboration: FigJam, Miro
• Process mapping/diagram review: Lucidchart/Lucidspark
• Enterprise async collaboration: Miro or Microsoft ecosystem
• Formal approvals/signoff: whiteboard + workflow/approval tool

If you want, I can also give you a shortlist of tools that specifically support approvals and audit trails, or compare them by pricing, enterprise features, and ease of async collaboration.