The average enterprise, according to many estimates, has between 200-500 individual security products installed, ranging from multiple products deployed on user endpoint devices, all the way up to large scale network monitoring and protection software/appliances, as well as cloud-based service offerings.
Many products, especially those that have been installed for a while, are located on premises. But an increasing number are being deployed in the cloud as a service (SaaS) where many of the newest entrants are focused.
Why security is currently so hard to manage
There are numerous single-focused security-oriented products (e.g., network monitoring, data leak protection, anti-malware, VPN, user authentication, identity management, single sign on, and many more).