CASB

CASB (Cloud Access Security Broker ) and the players
CSP ( Cloud Service Providers) Salesforce, GCP ,etc...
UEBA ( User Behavior Anlaytics )

• Palerra ( acquired by oracle )
• Perspecys ( Blue Coat )
• Netskope in campbell, CA raised $132 m
• Skyhigh Networks
• Bit Glass ( Campbell, CA ) 
• Cloud lock ( Waltham, MA)
• Elastica ( Blue Coat )
• Cipher Cloud
• Fire Layers  ( Acquired by ProofPoint )

References

http://www.esecurityplanet.com/network-security/slideshows/cloud-access-security-brokers-9-vendors-you-need-to-know.html

http://www.wsj.com/articles/cloud-security-startup-skyhigh-networks-raises-a-down-round-1474677341

https://www.skyhighnetworks.com/cloud-security-blog/forrester-ranks-casb-vendors-in-wave-report/

http://www.bitglass.com/casb-cloud-access-security-broker

http://info.skyhighnetworks.com/WP-Forrester-Wave-Q4-2016-Banner-Cloud-v2.html?Source=Website&LSource=Website