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Category, industry and company size
Company size describes the employer. It does not establish access for a solo practitioner.
AI assistants
275 companies, 4 tools
About these numbers
Counts cover companies recorded on usedby. They are not market shares. All four proof levels count. Missing size data is excluded only from size-based views. Your requirements have not been evaluated.
Companies with known size: 67%. Vendor companies excluded from this category: 1.
Claude
181 companies
94 confirmed39 observed48 signals
Spellbook builds contract drafting, review, and management software for legal teams, using Claude-powered agents inside Microsoft Word to flag risks, negotiate terms, and draft redlines.
Original source text
Behind the volume, an agreement that took 10 hours of work now takes about one, what Stevenson calls “a true 10x efficiency improvement.”
Spellbook · Read the source 
Gemini
80 companies
75 confirmed1 declared4 signals
ChatGPT
55 companies
12 confirmed32 observed11 signals
Uses ChatGPT Enterprise and custom GPTs for routine employee tasks across banking functions.
Original source text
After seeing initial success, BBVA expanded its rollout to 11,000 employees, creating thousands of custom GPTs for collaboration and work, with people saving nearly three hours per week on routine tasks and more than 80% engaging daily.
BBVA · Read the source
