Best component library builder for consultants

There are roughly 40-60 tools competing in the design-to-code component space (Storybook, Chromatic, Zeroheight, Backlight, and dozens of smaller players), but fewer than 10 are specifically optimized for consultants managing multiple client libraries at once. The core pain point isn't missing features—it's cognitive overhead. Consultants spend 20-30% of project time on library maintenance, governance, and handoff documentation instead of actual design work. Most tools treat libraries as a solo craft problem or an enterprise standardization tool; they miss the middle ground where consultants operate: rapid iteration across client contexts, version control without heavyweight Git workflows, and the ability to spin up a production library in days not months. The real gap is tooling that handles library versioning, client-specific theming, and cross-project component reuse without requiring developers to own the entire pipeline. A new shipper should focus on the handoff problem—making it trivial for consultants to lock in a library state, hand it to a client's dev team, and iterate independently post-launch.