Key benefices of on-premise systems
Greater security and privacy: On-premise systems are installed and operated on your premises,

so your data is always kept secure and private, as long as you harden your platform and keep them up to date.
More control and customization: On-premise systems give you more control over your security

system. You can customize it to meet your specific needs and requirements, whereas Cloud- based systems are more limited in customization options.
Higher performance: On-premise systems typically have higher performance than Cloud-based

systems, as they don't rely on the Internet connection or power outages.
Increased reliability: On-premise systems are less likely to experience downtime due to Internet

connection issues, as they don't rely on the Cloud for their functionality.
Disadvantages of on-premise systems
On-premise or legacy access control systems are becoming less secure every day. Legacy

systems are outdated and vulnerable to hackers who know how much time it takes for each server location or firm's IT department to have access control capabilities. Hackers can exploit these vulnerabilities because they're already familiar with the decades-old technology used in these legacy security methods, making them an easy target.
They can be expensive to purchase and maintain

It would be best to have a dedicated IT staff to manage them.

They can be challenging to scale up or down to meet your organization's needs.

They are less flexible than cloud-based systems.