Cyber threats are becoming more advanced, so organisations must have security tools that have the ability to scale quickly and work across modern IT environments. Traditional on-premises SIEM systems can struggle with high infrastructure costs, limited scalability, and complex management.
Microsoft Sentinel is a cloud-native SIEM and SOAR platform designed to solve these challenges. Built on Microsoft Azure, Sentinel delivers advanced threat detection, automation, and visibility across on-premises, hybrid, and cloud environments, minus the burden of managing physical infrastructure.
How Microsoft Sentinel works
Microsoft Sentinel collects and analyses security data from a wide range of sources, including Microsoft and third-party tools. It runs on Microsoft’s global cloud infrastructure, so organisations don’t need to manage servers or storage.
Microsoft Sentinel integrates with Microsoft’s threat intelligence ecosystem, which gathers signals from billions of devices worldwide. This allows faster detection of emerging threats as well as more accurate responses.
By using advanced analytics and machine learning, Microsoft Sentinel isn't just basic log collection. It identifies suspicious sign-ins, unusual data transfers, and abnormal behaviour patterns that are difficult to detect manually. By correlating events and prioritising serious incidents, Microsoft Sentinel reduces alert fatigue and helps security teams focus on what matters most.
Automation and integration
One of the core strengths of Microsoft Sentinel is its automation. It is a core strength of Microsoft Sentinel. With Azure Logic Apps, organisations can automate responses - isolating devices or resetting compromised accounts. This speeds up incident response and frees up security teams to focus on higher-value work.
Microsoft Sentinel integrates deeply with Microsoft Defender for Endpoint, Microsoft Entra ID, and Microsoft 365 security tools. It also supports third-party data sources, making it a central hub for unified security operations.
Industry use cases
Microsoft Sentinel supports a wide range of industries, including:
- Financial services benefit from better visibility into insider threats and compliance risks
- Healthcare organisations can protect sensitive patient data and support compliance with regulations like HIPAA
- Government agencies gain improved detection of advanced threats
- Enterprises undergoing digital transformation can manage hybrid and multi-cloud environments without the complexity of traditional SIEM systems
All of this is delivered without the capital expense and operational overhead of legacy platforms.
Microsoft Sentinel licensing and pricing
Microsoft Sentinel uses a consumption-based pricing model designed for flexibility and transparency. Pricing is divided into two main tiers.
The Analytics tier provides two options: Pay-As-You-Go (PAYG), which is a usage-based model, and Commitment Tiers, where users can reserve a specified daily ingestion capacity starting at 100 GB/day at a lower rate. Choosing certain tiers may offer cost reductions compared to PAYG pricing.
The Data Lake tier is an optional storage and analysis solution designed for large volumes of secondary or historical data, with compute and storage metered separately.
Microsoft has simplified billing by consolidating Microsoft Sentinel and Log Analytics charges into a single pricing meter for newer workspaces created after July 2023. This makes cost management easier and more transparent.
New workspaces also receive 10 GB/day of free analytics ingestion for the first 31 days. After 90 days of data retention, additional Log Analytics storage charges apply.
Pay-As-You-Go vs Commitment Tiers: Cost comparison
Using Microsoft’s published pricing, consider an organisation ingesting 100 GB of data per day:
- Pay-As-You-Go:
- Approx. $2.30 per GB
- Monthly cost: ~$6,900 (100 GB × 30 days × $2.30)
- 100 GB/day Commitment Tier:
- Approx. $1.96 per GB
- Monthly cost: ~$5,880
- Estimated savings: ~15%
Over a year, this can result in savings of more than $12,000.
For larger environments, pre-purchase options (Commitment Units or SCUs) can reduce costs. For example, a 200 GB/day commitment can deliver savings of up to 39% compared to PAYG, and when combined with pre-purchase discounts, total savings may exceed 50%.
Cost optimisation best practices
Organisations can control Sentinel costs without reducing security by following these strategies:
- Select the right pricing tier: Match Commitment Tiers to typical ingestion volumes
- Use simplified pricing: Take advantage of unified billing in newer workspaces
- Leverage Basic or Auxiliary Logs: Use lower-cost ingestion for high-volume, low-value data
- Separate non-security data: Store operational telemetry in separate workspaces
- Consider dedicated clusters: For ingestion over 100 GB/day, Log Analytics clusters can improve performance and cost efficiency
- Pre-purchase for long-term use: SCU commitments offer the deepest discounts at scale
Microsoft Sentinel - modernising security operations and controlling costs
Microsoft Sentinel allows organisations to modernise security operations while maintaining control over costs. By understanding data ingestion patterns, applying selective logging, and choosing the right pricing tier, organisations can align their security strategy with their financial goals.
With intelligent analytics, powerful automation, and transparent pricing, Microsoft Sentinel provides a scalable, cost-aware approach to enterprise security in today’s cloud-first world.
FAQ: Microsoft Sentinel and Cloud Security
Q1: What makes Microsoft Sentinel different from traditional SIEM?
Sentinel is cloud-native, scalable, and integrates advanced analytics and automation, removing the need for on-premises infrastructure.
Q2: How can I reduce Microsoft Sentinel costs?
Use commitment tiers, pre-purchase plans, simplified pricing, and dedicated clusters to optimise spend without compromising security.
Q3: Can Microsoft Sentinel integrate with non-Microsoft tools?
Yes. Sentinel supports third-party data sources, making it a central hub for unified security operations.
Q4: How does automation help my security team?
Automation via Azure Logic Apps allows tasks like device isolation or account resets to run automatically, freeing your team for high-priority security work.