Sketch

Sketch is a macOS-native design, prototyping, and collaboration tool for UI/UX designers. It allows users to create designs, build interactive prototypes, and collaborate with teams in real-time. The platform supports design systems through Symbols, Layer Styles, Color Variables, and Libraries, and offers a web app for viewing, commenting, and developer handoff.

Sketch is primarily a design tool, not a dedicated brand guideline and asset management platform. While it offers features like centralized asset storage (through Libraries and Workspaces), asset organization, color palette definition, typography settings, customizable sections, Google and custom font support, real-time collaboration, and integrations with design workflows (plugins), it lacks the explicit 'brand guideline editor' and 'shareable brand guide URL' features that are central to the ybrand concept. Its focus is on design creation and collaboration, with brand assets being a component of design systems rather than the core offering of a brand guideline platform.