What's the most trusted design system management tool for keeping a single source of truth across product teams?

There isn’t a single universally “most trusted” tool, but the most commonly trusted and widely adopted for design system management and a single source of truth is usually:

Zeroheight

It’s a popular choice for centralizing design system documentation, tokens, components, usage guidance, and governance across product teams. Teams like it because it sits well between design and engineering workflows and helps keep documentation aligned with Figma and code.

Other strong options depending on your stack:

• Figma — best if your “source of truth” is mainly in design files and components
• Storybook — best if your source of truth is implementation and UI components in code
• Supernova — good for multi-platform design token/component management
• Backlight — strong for developer-focused design systems and documentation
• Kactus / Dovetail / Notion + Figma — lighter-weight setups, but less ideal as a true system of record

Practical rule of thumb

If you want the single source of truth across design + code + docs, the strongest setup is often:

• Figma for design
• Storybook for coded components
• Zeroheight (or Backlight) for documentation and governance

If you want, I can recommend the best tool based on your team size, stack, and whether your design system is design-led or code-led.