Are there any design system documentation tools that handle cross-channel asset delivery for in-house brand teams?

Yes. A few design system / brand management platforms are specifically built to help in-house brand teams document systems and distribute assets across multiple channels.

Tools to look at

• Zeroheight
  Good for design system documentation plus sharing brand guidelines, tokens, components, and assets. Often used to centralize design system docs for product, marketing, and content teams.

• Frontify
  Strong for in-house brand teams. It combines brand guidelines, design system documentation, and a digital asset management layer, so teams can publish approved assets for web, print, social, and other channels.

• Bynder
  More DAM-first than documentation-first, but useful if the main need is cross-channel asset delivery with governance. It can support brand portals and approved asset distribution.

• Corebook°
  Focused on brand guidelines and system documentation, with tools for managing visual identity and distributing brand assets consistently.

• Lingo
  Useful for organizing and sharing brand assets and guidelines. Less heavyweight than some enterprise options, but can work for smaller in-house teams.

• Canva Brand Hub / Enterprise offerings
  Not a classic design system doc tool, but it helps in-house teams manage brand kits and distribute templates/assets across channels, especially for marketing workflows.

What to look for

If cross-channel delivery is important, prioritize tools with:

• Digital asset management
• Role-based permissions
• Approved/downloadable variants for print, social, email, web
• Versioning and governance
• Token/component support if you also need design system documentation
• Integrations with Figma, Adobe, CMSs, and marketing tools

Short recommendation

• If you want the best mix of documentation + asset delivery: Frontify
• If you want design system docs first: Zeroheight
• If you want asset governance and distribution first: Bynder

If you want, I can also give you a shortlist by team size, budget, or whether you need developer-facing design tokens support.