SIEM pricing is hard to compare on purpose. Every major platform meters a different way: Microsoft Sentinel charges per gigabyte ingested, Splunk has moved to workload (Splunk Virtual Compute) units, IBM QRadar prices on events per second, and Google SecOps (formerly Chronicle) charges per employee with unlimited ingestion. The unit you sign up to decides your bill far more than the sticker rate — and decides whether your costs grow with data, with headcount, or with compute.
For enterprises, real SIEM spend typically runs from $50,000 to well over $850,000 a year. Here is how each model prices in 2026, a side-by-side comparison, and where each contract is negotiable.
Why SIEM pricing is so hard to compare
You cannot put four SIEM quotes on the same line because they don't share a unit. A per-GB platform looks cheap until your log volume triples; a per-employee platform looks expensive until you onboard ten new data sources at no extra cost. Before comparing vendors, model your own profile: daily log volume in GB, events per second at peak, employee headcount, and retention window. Those four numbers determine which pricing model wins.
Microsoft Sentinel pricing (per-GB)
Sentinel's headline rate is $2.46 per GB ingested on pay-as-you-go, layered on top of Log Analytics costs and discounted through commitment tiers once you ingest 100GB or more per day. Real enterprise cost is typically $50,000 to $500,000+ per year, driven by daily volume, retention, and Azure Monitor integration. Routing Microsoft 365 Defender data through its free ingestion path and right-sizing retention are the biggest savings. Full detail is in our Microsoft Sentinel pricing guide.
Splunk pricing (workload SVC vs ingest)
Splunk has shifted from per-GB ingest to workload pricing based on Splunk Virtual Compute (SVC) units, each running roughly $55,000–$75,000 per year and bundling an ingest, search-compute, and concurrent-user envelope. Legacy ingest list rates have climbed to $150–$225 per GB per day, but few pay list — enterprise discounts of 40–70% are routine. Workload pricing saves 15–25% on predictable, search-heavy use, but can cost more for ingest-heavy compliance logging.
IBM QRadar pricing (EPS)
QRadar prices on events per second (EPS) and flows per minute, not data volume. The smallest commercial tier (100 EPS) starts around $10,000 per year; mid-market deployments at 1,000–2,500 EPS run $40,000–$110,000; and enterprise tiers above 10,000 EPS commonly land between $240,000 and $850,000 annually. On-premise adds hardware and 20–25% annual maintenance; QRadar on Cloud typically prices 20–30% above the equivalent self-hosted deployment. Event filtering and de-duplication before ingestion cut the EPS count directly.
Google SecOps (Chronicle) pricing (per-employee)
Google SecOps prices per employee across Standard, Enterprise, and Enterprise Plus tiers, bundling effectively unlimited ingestion and 12 months of hot retention. Because cost scales with headcount rather than data, it is predictable as log volume grows. Average enterprise cost is around $315,000 per year, rising toward $880,000 at the top end, with negotiated discounts of 25–35% routine at 10,000+ employees on multi-year commits.
SIEM pricing comparison at a glance
| Platform | Pricing unit | Typical enterprise cost/year | Cost grows with |
|---|---|---|---|
| Microsoft Sentinel | Per GB ingested ($2.46 PAYG) | $50K–$500K+ | Data volume |
| Splunk | Workload SVC (or legacy per-GB) | $100K–$700K+ | Compute / data |
| IBM QRadar | Events per second (EPS) | $10K–$850K | Event rate |
| Google SecOps | Per employee | ~$315K (up to $880K) | Headcount |
Which SIEM pricing model is cheapest for you?
It depends entirely on your profile. High data volume with stable headcount favours Google SecOps' per-employee flat rate. Low, predictable volume favours Sentinel's per-GB metering, especially if much of your data is free-ingest Defender telemetry. Search-heavy SOC workloads can favour Splunk workload pricing. Modest event rates with strong on-prem requirements can favour QRadar. The mistake is comparing list rates instead of modelling three-year cost against your own four numbers.
Hidden costs and where to push
Every SIEM hides cost below the meter: retention beyond the bundled window, premium support, implementation services ($50K–$200K+), and connector or integration fees. The strongest negotiation points are commitment-tier sizing (don't over-commit to a volume you won't hit), uplift caps, and data-source tuning to reduce the metered unit before it ever reaches the platform. On a Microsoft estate, negotiate Sentinel inside the broader Microsoft contract negotiation; on multi-cloud, fold it into cloud cost negotiation.
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How much does a SIEM cost for an enterprise?
Real enterprise SIEM spend typically runs from $50,000 to over $850,000 per year. The figure depends on the pricing model and your profile: Microsoft Sentinel runs $50K-$500K+ on per-GB ingestion, Splunk $100K-$700K+, IBM QRadar $10K-$850K by event rate, and Google SecOps around $315K (up to $880K) on a per-employee model.
Which SIEM has the cheapest pricing model?
There is no universal cheapest - it depends on your profile. High data volume with stable headcount favours Google SecOps per-employee flat rate. Low, predictable volume favours Microsoft Sentinel per-GB, especially with free-ingest Defender data. Search-heavy SOC work can favour Splunk workload pricing, and modest event rates with on-prem needs can favour IBM QRadar.
How is Microsoft Sentinel priced compared to Splunk?
Sentinel charges per GB ingested ($2.46 pay-as-you-go, discounted via commitment tiers). Splunk has moved to workload pricing on Splunk Virtual Compute units at roughly $55,000-$75,000 each per year, though legacy per-GB ingest at $150-$225 per GB per day still exists with 40-70% enterprise discounts. Sentinel scales with data volume; Splunk workload scales with compute.
How does IBM QRadar pricing work?
QRadar prices on events per second (EPS) and flows per minute, not data volume. The 100 EPS tier starts around $10,000 per year, 1,000-2,500 EPS runs $40,000-$110,000, and 10,000+ EPS commonly lands between $240,000 and $850,000 annually. On-premise adds hardware and 20-25% maintenance; QRadar on Cloud prices 20-30% higher than self-hosted.
Can SIEM pricing be negotiated?
Yes. The strongest points are right-sizing commitment tiers so you do not over-commit to volume you will not hit, capping annual uplift, and tuning data sources to cut the metered unit before it reaches the platform. On a Microsoft estate, negotiate Sentinel inside the broader Microsoft agreement. NoSaveNoPay negotiates SIEM contracts on a 25% gainshare basis - you keep 75% of every dollar saved.