#1 — IDEO
ideo.comSF, NYC, London, Chicago, Tokyo, Munich | Est. 1991 | $$$$ | 9.7/10
The firm that brought human-centered design into mainstream business practice — and the firm whose Palo Alto and San Francisco offices have shaped the West Coast design culture more than any other practice. IDEO's influence on how Silicon Valley approaches user research, prototyping, and design thinking is difficult to overstate, but what earns the ranking is current output, not historical importance. Their ability to operate upstream of a brief — mapping problem spaces before proposing solutions — remains unmatched. When an organization does not yet know what it should be building, IDEO is where you go before you go anywhere else.
Best for: Innovation consultancy, service design, healthcare, education, social impact, enterprise transformation
Services: Design thinking, UX research, service design, product strategy, organizational design
Notable clients: Apple (early work), Kaiser Permanente, Bank of America, Oral-B
Recognition: Fast Company Most Innovative Companies, Cooper Hewitt National Design Award





