If you use Frontify, you'll love TotalCtrl.

Frontify hosts your brand guidelines and digital assets on its own platform. TotalCtrl matches both sides: the Standards Hub holds your glossary, style rules, and a visual Brand Kit — and actually applies them, styling emails, newsletters, journeys, and in-product messages and feeding AI writing as live context — while Digital Assets is a full DAM with AI auto-tagging, meaning-based search, approval workflows, shareable collections, and public Brand Portals. Guidelines, assets, and the tools that use them, in one place instead of a standalone silo.