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Megan SHAW Jun 25, 2022 12:48:00 AM 4 min read

A comparison of on-premises SIEM vs. Cloud SIEM

Security Information and Event Management (SIEM) is a critical component of an organization's security infrastructure, providing real-time analysis and alerting on potential threats and vulnerabilities. Traditionally, SIEM has been deployed on-premises, with the software and hardware being installed and managed locally. However, in recent years, the rise of cloud computing has led to the emergence of cloud-based SIEM solutions, which are hosted and managed remotely.

In this blog, we will compare on-premises SIEM and cloud SIEM, looking at the key differences between the two and discussing the pros and cons of each approach.

One of the main differences between on-premises SIEM and cloud SIEM is the deployment model. On-premises SIEM requires the installation and maintenance of hardware and software on-site, which can be a complex and costly process. This involves purchasing and installing servers, storage, networking equipment, and the SIEM software itself. Once installed, the on-premises SIEM must be maintained and updated by the organization's IT team, which can be time-consuming and labor-intensive.

In contrast, cloud SIEM is hosted and managed remotely by the provider, with the organization accessing the service via the internet. This means that there is no need to purchase and maintain hardware and software on-site, reducing the complexity and cost of deployment. The provider is responsible for maintaining and updating the SIEM software, freeing up the organization's IT team to focus on other tasks.

Another key difference between on-premises SIEM and cloud SIEM is the scalability of the solution. On-premises SIEM is limited by the hardware and software that has been installed on-site, making it difficult to scale up the system to accommodate an increase in data volume or the number of users. In contrast, cloud SIEM is highly scalable, with the provider able to quickly and easily add additional resources as needed to support the organization's growing security needs.

Another important consideration when comparing on-premises SIEM and cloud SIEM is the level of control and customization offered by the two approaches. With on-premises SIEM, the organization has complete control over the hardware and software, allowing for a high level of customization and flexibility. This can be beneficial for organizations with unique security requirements or those that want to fine-tune the SIEM to their specific needs.

In contrast, cloud SIEM is typically less customizable, with the provider offering a standard set of features and functionality. While this may be sufficient for many organizations, it can be a limitation for those with more complex security requirements.

In terms of cost, on-premises SIEM can be more expensive than cloud SIEM in the long run. While the initial cost of deployment may be lower, on-premises SIEM requires ongoing maintenance and support, which can add up over time. In contrast, cloud SIEM is typically offered on a subscription basis, with the organization paying a monthly or annual fee for access to the service. This can make cloud SIEM more affordable in the long term, as the provider is responsible for maintaining and updating the software.

Overall, the decision between on-premises SIEM and cloud SIEM will depend on the specific needs and requirements of the organization. On-premises SIEM offers greater control and customization, but can be more complex and costly to deploy and maintain. Cloud SIEM is simpler and more affordable, but may be less customizable and offer less control.


Megan SHAW

Product advocate to current customers, I am old school with a varied set of experiences.