60 companies are featured in the Build it book with a full "play" or case study/explanation of a tool or project – they are :

3M
Adobe
American Express
Atlassian
Bamboo HR
Basecamp
BetterCloud
Boston Consulting Group
BrewDog
Buffer
CarTrawler
Causeway Technologies
Citation
Coleman Group
Crawford & Company
GM Holden Ltd.
Goodman Masson
GreatCall
Halfords
Hershey Company Homeserve
ICC Sydney
Illuminate Education
Interface Carpets
LinkedIn
Drift
Dunelm
G Adventures
GAME
Gap Inc.
GE
Discovery Communications
KFC
Krispy Kreme
McDonald’s
money.co.uk
MVF
Pentland Brands
PhlexGlobal
Semler
SnackNation
Southwest Airlines
St. John Ambulance
Stonegate Pub Company
Talon Outdoor
The Estée Lauder Companies
Travis Perkins PLC
Valve Corporation
VaynerMedia
Venables Bell & Partners
Virgin Group
Vitsoe
Vocus Communications  Weebly
Wistia
Xero
Zappos
Zeel 

There are additional plays – which we call Bonus Plays – available on the book's website at www.rebelplaybook.com. Sometimes these are second plays from someone already featured in the book, sometimes they're a brand new company. New plays are uploaded regularly and include Home Group, Merlin Entertainment, LinkedIn, Zappos and McDonald's.

In addition to the companies featured in a play, a number of companies are referenced in the book and used to explain key points or as examples. They include Netflix, Amazon, and Slack.