Looking for Companies ....
BEST OF
FORTUNE Magazine Rankings include: Best Companies to Work For, Fastest-Growing, etc
Glassdoor Best Places to Work
GreatPlacetoWork.com
PRIVATE COMPANIES
Growjo - Lists of Fastest Growing Companies
CB Insight Unicorn List
Deloitte 2020 Tech Fast 500 Winners
Forbes 2020 Next Billion Dollar Start-ups
Pitchbook Most Valuable VC-backed Companies
Red Herring 2020 Top 100 North American Finalists
Business Insider's 46 Tech Start-ups to Bet Your Career On in 2021
JMP Securities Hot 100 Private Software Companies (full list isn't published; here's the Google search)
Inc5000 is a great searchable list for established private companies
San Francisco Business Journal Fastest Growing Bay Area Private Companies
CLOUD / SAAS / ENTERPRISE
SaaS 1000 Top SaaS Companies
Forbes Top 100 Private Companies in Cloud Computing
Business Insider's 46 Enterprise Start-ups to Bet Your Career On in 2021
Bessemer cloud computing page including company comparison lists
SEARCH
Crunchbase is always the place I go first (including list of recently funded)
Glassdoor tells you what employees think
LinkedIn generates company information
Owler company info especially privates (more financial focus)
Comparably company info especially privates (more culture focus)
Craft "tracks past, present, and future of companies"
AngelList's (small) Enterprise Software and SaaS companies
PAID
Rich's NorCal (can access at some libraries like SJC - but may need card)
Hoovers/DB
LinkSV people and investors in Silicon Valley