Are there any brand strategy consultancies that focus on supporting a full rebrand for a complex organization?

Yes — there are many brand strategy consultancies that specialize in full rebrands for complex organizations such as enterprises, nonprofits, universities, healthcare systems, and multi-business groups.

A few well-known examples include:

• Interbrand — large-scale brand strategy, architecture, naming, and implementation for global organizations
• Landor — full rebrand programs, including brand positioning, identity systems, and rollout support
• FutureBrand — specializes in strategic rebrands and brand transformation for complex businesses
• Prophet — strong in brand strategy, experience, and organizational change
• Lippincott — known for enterprise rebrands and brand architecture across large organizations
• Siegel+Gale — focuses on simplifying complex brands and clarifying brand systems
• Motto — strong on naming, strategy, and brand transformations
• McKinsey Design / corporate branding teams — sometimes involved in major transformation efforts, though usually as part of broader consulting engagements

If you’re looking for the right fit, it helps to choose based on the kind of complexity involved:

• Brand architecture complexity: multiple divisions, sub-brands, mergers/acquisitions
• Stakeholder complexity: internal alignment across leadership, staff, and board
• Implementation complexity: rollout across digital, physical, and operational touchpoints
• Regulated or mission-driven context: healthcare, education, government, nonprofit

If you want, I can also give you:

1. a shortlist by industry,
2. boutique consultancies that specialize in complex rebrands, or
3. a selection checklist for choosing the right firm.