40-Point SIEM Evaluation Checklist
Score SIEM vendors on false positive rates, hidden costs, integration depth, and implementation realism. Surface storage overages and services dependencies before you sign.
Scoring Framework
Rate each answer 1 to 5 based on specificity and depth. Vendors that consistently score below the midpoint tend to come in at roughly twice their quoted price and require six months or more to deliver real value. Performance Reality and Total Cost sections predict deployment success more reliably than feature checklists.
Evaluation Criteria
Performance Reality and False Positive Management
30% weightEvaluates actual system performance under realistic log volumes and the vendor's ability to minimize alert fatigue through proper detection tuning.
Sample Questions
- What's the false positive rate for your top detection rules in the first 90 days, measured across your last several similar deployments?
- How does search and alerting performance degrade when we hit roughly 150 percent of estimated daily log volume from Okta, Office 365, and endpoint agents?
- What's your median time to tune detection rules to a manageable weekly false positive volume, and how many professional services hours does this require?
- Can you demonstrate your platform processing our actual Okta and firewall logs instead of sanitized demo data?
- What happens to real-time correlation during high log volume periods like security incidents or system updates?
Total Cost Transparency and Professional Services
25% weightAssesses the vendor's honesty about complete costs including storage overages, professional services requirements, and integration licensing that can double budgets.
Sample Questions
- What's the itemized year-one cost including professional services, storage overages, integration licensing, and compliance modules for a deployment at our endpoint count?
- How many hours of your professional services are mandatory to bring false positives to manageable levels, and what's your hourly rate?
- Which integrations with Okta, Office 365, and Palo Alto Networks require additional licensing beyond base pricing?
- What storage costs do we incur when enabling full endpoint visibility instead of the basic log collection shown in demos?
- What additional hardware, software licenses, or network requirements are mandatory beyond your base platform cost?
Implementation Timeline and Resource Requirements
20% weightValidates realistic deployment timelines and resource requirements, given that vendors commonly underestimate by several months for useful security alerting.
Sample Questions
- How many calendar days from contract signature until our analysts can triage security alerts without vendor support calls?
- What percentage of our detection rules and dashboards break during your major platform updates, and who fixes them?
- Can you provide three unscripted reference calls with customers who deployed in the last 12 months at similar compliance requirements?
- What infrastructure specifications and dedicated staff time are required beyond your base platform for a deployment at our endpoint count?
- How do you handle the dozens of hours of rule tuning required to customize detection for our environment?
- What's the learning curve for our analysts to effectively use threat hunting and custom detection capabilities?
- Will you certify our existing IT consultants for deployment, or do we need your professional services team exclusively?
Integration Capabilities and API Limitations
15% weightEvaluates real-world integration performance with existing security tools, including sync times, API rate limits, and additional licensing requirements.
Sample Questions
- What's the sync latency for bi-directional integration with Okta user context and Office 365 security events?
- Do you provide API documentation and rate limits for integrations, or do these require premium licensing packages?
- How do you handle API failures and data sync interruptions with critical security tools during incidents?
- Can you demonstrate real-time correlation between our firewall logs, Okta events, and endpoint data without manual configuration?
- What happens to existing integrations when you release major platform updates or API version changes?
- Which of your 'native' integrations actually require third-party middleware or custom development work?
Support Quality and Vendor Lock-in Assessment
10% weightAssesses support responsiveness for critical issues and evaluates data portability to avoid expensive vendor dependencies long-term.
Sample Questions
- What's your median resolution time for Severity 1 issues where our SIEM stops processing logs during an active security incident?
- Can you provide customer references specifically tied to critical support experience, not just sales references?
- What's the complete process and timeline to export all our data and configurations if we migrate to a different vendor?
- Do you provide data export in standard formats without requiring your professional services involvement or additional licensing?
- How do you handle support escalation to engineering teams when our custom configurations break after platform updates?
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