10 Best SIEM Tools of 2026

1. 1

   Microsoft Sentinel

   Cloud-native SIEM in Azure with an analytics tier, a low-cost security data lake and commitment-tier ingestion pricing.

   8.9overall

   Cloud-native SIEM in Azure with an analytics tier, a low-cost security data lake and commitment-tier ingestion pricing.

   Best forSecurity teams already running Microsoft 365, Defender and Azure

   Adoption data

   IDC MarketScape LeaderMicrosoft says it was named a Leader in the IDC MarketScape: Worldwide SIEM 2026 Vendor Assessment.

   Microsoft, Microsoft Sentinel: AI-ready SIEM (2026): “Microsoft was named a Leader in the IDC MarketScape: Worldwide SIEM 2026 Vendor Assessment.”

   Microsoft Sentinel ranks first because it pairs the broadest set of documented pricing levers with strong analyst recognition. Its pricing page splits data into an analytics tier, which supports all log types with full alerting and query, and a data lake tier for cheaper long-term storage used in investigations and compliance. Teams that can predict their volume can reserve daily ingestion through commitment tiers from 100 GB to 50,000 GB, which Microsoft says save up to 52% over pay-as-you-go, and overage is billed at the same discounted rate. Microsoft also offers up to 5 MB of free ingestion per user per day for key security logs, which lowers the cost of Microsoft 365 and Defender data. The product page lists 400+ connectors and cites a Leader placement in the IDC MarketScape for SIEM in 2026. The drawback is price transparency: the Azure page renders rates by region, so buyers need the calculator or a quote. We compared documented features and published prices; we did not run our own detection tests.

   Strengths

   • +Commitment tiers save up to 52% over pay-as-you-go rates, per Microsoft's pricing page
   • +Usage above a commitment tier is billed at the same discounted rate
   • +Named a Leader in the IDC MarketScape: Worldwide SIEM 2026 Vendor Assessment

   Limitations

   • −Prices on the Azure page load per region, so we could not record a fixed USD rate
   • −Commitment tiers can only be downgraded after 31 days
   • −The 50 GB commitment tier is a promotional public preview that ends December 31, 2026

   SummaryMicrosoft Sentinel is the best choice for Microsoft-centric security teams because commitment tiers cut ingestion costs by up to 52% and key Microsoft security logs get a free daily allowance. Use the Azure calculator for your region before you commit.

2. 2

   Splunk Enterprise Security

   Cisco-owned SIEM sold in Essentials and Premier editions, with SOAR, UEBA and threat intelligence in the top tier.

   8.6overall

   Cisco-owned SIEM sold in Essentials and Premier editions, with SOAR, UEBA and threat intelligence in the top tier.

   Best forLarge SOCs that want a long-standing SIEM leader and can negotiate a quote

   Adoption data

   11 timesSplunk says it was named a Leader in the Gartner Magic Quadrant for SIEM for the eleventh consecutive time in the 2025 report.

   Splunk, 2025 Gartner Magic Quadrant for SIEM (2025): “Splunk named a Leader 11 times in a row.”

   Splunk Enterprise Security takes second place on features and adoption, but loses ground on value because neither edition has a public price. The product page describes two editions. Essentials covers the core SIEM plus threat intelligence, Detection Studio, Exposure Analytics and the AI Assistant in Security. Premier adds built-in user and entity behavior analytics, SOAR and Automated Threat Analysis, which Splunk positions as a way to consolidate several SOC tools into one interface. On adoption, Splunk says it has been named a Leader in the Gartner Magic Quadrant for SIEM 11 times in a row, most recently in the 2025 report, which is the longest run claimed by any vendor here. The catch is cost: both editions are sold through quotes, and large ingest volumes are where SIEM bills grow fastest. Buyers should model their daily data volume before talks and compare the Premier quote against separate SOAR tools. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Named a Leader in the Gartner Magic Quadrant for SIEM 11 times in a row, per Splunk
   • +Premier bundles SOAR and UEBA instead of selling them as separate products
   • +Clear two-edition structure on the product page

   Limitations

   • −Both editions are listed as Get a quote, with no public price
   • −UEBA and SOAR require the Premier edition
   • −Value depends heavily on negotiated ingest or workload terms

   SummarySplunk Enterprise Security is the best choice for large SOCs that want SIEM, SOAR and UEBA in one licensed edition because Premier bundles all three. Expect a sales-led process with no public price.

3. 3

   CrowdStrike Falcon Next-Gen SIEM

   Index-free SIEM on the Falcon platform that ingests Falcon telemetry without extra ingestion charges.

   8.5overall

   Index-free SIEM on the Falcon platform that ingests Falcon telemetry without extra ingestion charges.

   Best forCrowdStrike Falcon customers that want endpoint, identity and cloud data in their SIEM

   Adoption data

   184 reviewsCrowdStrike says Falcon Next-Gen SIEM has an overall rating of 4.7 out of 5 based on 184 reviews in the SIEM category on Gartner Peer Insights.

   CrowdStrike, Falcon Next-Gen SIEM (2026): “CrowdStrike has an Overall Rating of 4.7 out of 5 and the most reviews in a 12 month period in the Security Information and Event Management, based on 184 reviews on Gartner Peer Insights”

   CrowdStrike Falcon Next-Gen SIEM is the strongest pick for organizations already running Falcon. The product page states that data from licensed Falcon modules, including endpoint, identity and cloud telemetry, is available without additional ingestion charges, which removes the largest SIEM cost driver for those sources. It can also be bought as a standalone SIEM for third-party data. CrowdStrike describes an index-free architecture with federated search across distributed sources, including Snowflake, and the Falcon Onum pipeline for filtering and routing telemetry before it lands. On adoption, the page cites an overall rating of 4.7 out of 5 from 184 Gartner Peer Insights reviews in the SIEM category, plus a Leader placement in the IDC MarketScape for SIEM in 2026. The weaknesses are price opacity, since Next-Gen SIEM has no public rate, and the fact that speed and savings claims are projections from pre-sale data. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +No ingestion charge for endpoint, identity and cloud data from licensed Falcon modules
   • +Gartner Peer Insights rating of 4.7 out of 5 from 184 reviews, per CrowdStrike
   • +15-day free trial offered on the product page

   Limitations

   • −No public price for Next-Gen SIEM
   • −The largest savings apply only if you already license Falcon modules
   • −Speed and cost figures on the page are vendor projections from pre-sale data

   SummaryCrowdStrike Falcon Next-Gen SIEM is the best choice for Falcon customers because their endpoint, identity and cloud telemetry flows in with no additional ingestion charge. Teams without Falcon should compare it as a standalone SIEM on a quote.

4. 4

   Elastic Security

   SIEM and endpoint protection on Elasticsearch, sold serverless with per-GB ingest and retention prices.

   8.5overall

   SIEM and endpoint protection on Elasticsearch, sold serverless with per-GB ingest and retention prices.

   Best forTeams that want published per-GB SIEM prices and no per-endpoint fees

   Adoption data

   1,800Elastic reported more than 1,800 customers with annual contract value above $100,000 in its first quarter of fiscal 2027, across all of its products.

   Elastic N.V. (SEC Form 8-K, Exhibit 99.1), Elastic Reports First Quarter Fiscal 2027 Financial Results (2026): “Total customer count with Annual Contract Value (ACV) greater than $100,000 was over 1,800 compared to over 1,720 in Q4 FY26, and over 1,550 in Q1 FY26”

   Elastic Security is the most transparent large SIEM on this list. Its serverless pricing page lists two tiers with per-GB rates: Security Analytics Essentials at as low as $0.09 per ingested GB and $0.017 per retained GB per month, and Security Analytics Complete at $0.11 and $0.019. Elastic says there are no per-endpoint fees, and Essentials already includes prebuilt detection rules, machine learning, threat intelligence integration and Elastic Defend endpoint protection with ransomware and memory prevention. Complete adds entity analytics and UEBA, threat intelligence management, the Elastic AI Assistant and workflow automation. On adoption, Elastic reported over 1,800 customers with annual contract value above $100,000 in its first quarter of fiscal 2027, a company-wide figure that spans search, observability and security. The trade-offs are that retention is a separate meter, and cloud posture and workload protection cost extra per asset. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Published per-GB ingest and retention prices for both serverless tiers
   • +No per-endpoint fees on Elastic Security Serverless
   • +Endpoint protection is included in the entry tier

   Limitations

   • −Retention is billed separately at $0.017 to $0.019 per GB per month
   • −UEBA and the AI Assistant require the Complete tier
   • −Cloud workload and posture protection are paid add-ons

   SummaryElastic Security is the best choice for teams that want to budget a SIEM from a public rate card because ingest starts at $0.09 per GB with endpoint protection included. Add retention costs before comparing with flat-rate vendors.

5. 5

   Google Security Operations

   Google Cloud SIEM and SOAR sold in three ingestion-based packages with one year of retention included.

   8.5overall

   Google Cloud SIEM and SOAR sold in three ingestion-based packages with one year of retention included.

   Best forEnterprises that want a year of hot retention and Google threat intelligence in the SIEM

   Adoption data

   IDC MarketScape LeaderGoogle says it was named a Leader in the 2026 IDC MarketScape for SIEM.

   Google Cloud, Google Security Operations (2026): “Google named a Leader in the 2026 IDC MarketScape for SIEM”

   Google Security Operations has one of the most generous documented retention policies here. Google says every package includes one year of security telemetry retention at no additional cost, and the Standard package already bundles SIEM and SOAR with 700+ parsers, 300+ SOAR integrations and a detection engine for up to 1,000 single-event and 75 multi-event rules. Enterprise raises those limits, adds YARA-L based UEBA, Google curated detections and Gemini in security operations for natural language search and investigation summaries. Enterprise Plus adds full Google Threat Intelligence, including Mandiant and VirusTotal, and supports up to 3,500 single-event rules. On adoption, the page cites a Leader placement in the 2026 IDC MarketScape for SIEM. It scores lower on value only because all three packages are priced through sales, so there is no public rate to compare with Elastic or Datadog. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +12 months of hot data retention in every package
   • +SIEM and SOAR are both included from the Standard package
   • +Named a Leader in the 2026 IDC MarketScape for SIEM, per Google

   Limitations

   • −All three packages say Contact sales for pricing
   • −UEBA and curated detections start at the Enterprise package
   • −Full Mandiant intelligence requires Enterprise Plus

   SummaryGoogle Security Operations is the best choice for enterprises with long retention needs because 12 months of hot data is included in every package. Ask for Enterprise pricing if you need UEBA and Gemini.

6. 6

   Datadog Cloud SIEM

   SIEM built into the Datadog observability platform, priced per GB analyzed with 12 months of retention.

   8.3overall

   SIEM built into the Datadog observability platform, priced per GB analyzed with 12 months of retention.

   Best forCloud and DevOps teams already sending logs to Datadog

   Adoption data

   4,860Datadog reported about 4,860 customers with annual recurring revenue of $100,000 or more as of September 30, 2026, across all of its products.

   Datadog, Inc. (SEC Form 8-K, Exhibit 99.1), Datadog Announces Third Quarter 2026 Financial Results (2026): “As of September 30, 2026, we had about 4,860 customers with ARR of $100,000 or more, an increase of 20% from about 4,060 as of September 30, 2025.”

   Datadog Cloud SIEM is the natural pick for teams whose logs already flow through Datadog. The pricing page lists a single meter: from $5 per GB analyzed per month on annual billing, or $7.50 on demand, and that price includes 12 months of analysis and retention. Datadog says the product ships with more than 800 detection rules maintained by its own detection engineers, runs detections on logs in real time, and adds Bits Security Analyst, which investigates alerts and comes with a free monthly allotment tied to the volume analyzed. Security signals are kept for 15 months at no extra charge, and workflows triggered from signals are free. Datadog reported about 4,860 customers with $100,000 or more in ARR as of September 30, 2026, a company-wide figure. The main risk is volume: a per-GB analyzed price is simple, but noisy firewall or DNS logs can make it expensive, so filter before ingest. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Public per-GB price that includes 12 months of retention
   • +Workflows triggered from security signals are free
   • +Shares one agent and log pipeline with Datadog observability

   Limitations

   • −On-demand rate is $7.50 per GB, 50% above the annual rate
   • −Per-GB pricing can climb fast for high-volume network and firewall logs
   • −Most useful for teams already on Datadog

   SummaryDatadog Cloud SIEM is the best choice for teams already on Datadog because $5 per GB analyzed includes 12 months of retention and 800+ maintained rules. Filter high-volume sources before you turn it on.

7. 7

   Wazuh

   Open source SIEM and XDR platform that is free to self-host, with a managed Wazuh Cloud option.

   8.2overall

   Open source SIEM and XDR platform that is free to self-host, with a managed Wazuh Cloud option.

   Best forTeams on a tight budget with the skills to run open source security tools

   Adoption data

   15 millionWazuh says its open source platform protects more than 15 million endpoints and has more than 100,000 enterprise users.

   Wazuh, Wazuh: The Open Source Security Platform (2026): “15+ Million Protected endpoints 100+ Thousand Enterprise users”

   Wazuh is the cheapest serious route to a SIEM on this list. The open source platform combines SIEM and XDR functions and carries no license cost when you host it yourself, which is why it scores highest on value. Teams that do not want to run the stack can buy Wazuh Cloud, priced by active agents rather than gigabytes: Small covers up to 100 agents from $571 a month with 1 month of indexed and 3 months of archive retention, Medium covers 250 agents from $923, and Large covers 500 agents from $1,467. Wazuh Cloud includes an AI security analyst and Wazuh threat intelligence, and the vendor says it is PCI DSS and SOC 2 compliant. Wazuh's homepage cites 15+ million protected endpoints and 100+ thousand enterprise users. The trade-off is effort: self-hosted Wazuh needs engineers to maintain indexing, upgrades and detection tuning, and the Small cloud tier has short indexed retention. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Free self-hosted option with no license cost
   • +Wazuh Cloud prices are published by agent count
   • +Wazuh cites 15+ million protected endpoints

   Limitations

   • −Self-hosting means your team runs the indexer, updates and scaling
   • −Wazuh Cloud Small keeps indexed data for 1 month and archives for 3 months
   • −Free tier relies on community support

   SummaryWazuh is the best choice for budget-limited teams with in-house skills because the self-hosted SIEM has no license cost. Wazuh Cloud from $571 a month suits teams that want the same platform managed.

8. 8

   Graylog Security

   SIEM edition of the Graylog log platform, priced by daily volume from 10 GB a day.

   7.9overall

   SIEM edition of the Graylog log platform, priced by daily volume from 10 GB a day.

   Best forLean security teams that want a fixed annual SIEM price

   Adoption data

   60,000Graylog says it serves more than 60,000 organizations across 180 countries with its paid and open products.

   Graylog, About Graylog (2026): “Graylog serves more than 60,000 organizations across 180 countries.”

   Graylog Security is a good fit for teams that want a predictable SIEM bill instead of an open-ended per-GB meter. The pricing page lists Graylog Security from $18,000 a year, based on 10 GB a day of volume or 100 Graylog Compute Units on annual consumption. It includes everything in Graylog Enterprise, such as data tiering across hot, warm and archive storage, a correlation engine and Graylog-maintained parsers, then adds identity-based risk triage, automatic case creation with evidence collection, machine-learning anomaly detection and detection rules mapped to MITRE ATT&CK. Graylog Open remains free and source-available under SSPL with no volume restrictions, which gives smaller teams a start before paying. Graylog says it serves more than 60,000 organizations across 180 countries, a figure that includes free users. The limits: the entry price assumes about 10 GB a day, so heavier environments must ask for a quote, and the integration catalog is smaller than at Microsoft or Google. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Published annual starting prices for every paid edition
   • +Graylog Open is free with no volume restrictions
   • +Choice of daily-volume or annual consumption licensing

   Limitations

   • −The $18,000 entry price assumes about 10 GB a day
   • −Graylog Open has community support only
   • −Smaller ecosystem of prebuilt integrations than the cloud giants

   SummaryGraylog Security is the best choice for lean security teams that want a fixed annual SIEM price because it starts at a published $18,000 a year for 10 GB a day. Start on free Graylog Open if you only need log search.

9. 9

   Rapid7 Incident Command

   Rapid7's next-gen SIEM, successor to InsightIDR packaging, sold in three tiers with asset-based pricing.

   7.9overall

   Rapid7's next-gen SIEM, successor to InsightIDR packaging, sold in three tiers with asset-based pricing.

   Best forMid-market teams that want SIEM, UEBA and attack surface data in one subscription

   Adoption data

   11,800Rapid7 said in its third quarter 2026 results that it serves approximately 11,800 customers worldwide.

   Rapid7, Inc. (SEC Form 8-K, Exhibit 99.1), Rapid7 Announces Third Quarter 2026 Financial Results (2026): “unifies exposure and detection to transform the cybersecurity operations of approximately 11,800 customers worldwide”

   Rapid7 Incident Command is the SIEM for buyers who dislike ingestion-based billing. Rapid7's pricing page says all packages use asset-based pricing so there are no surprise costs, and it lists three tiers: Essential, Advanced and Ultimate. Every tier includes detection triage, investigation and reporting, log management with third-party sources, the Rapid7 Agent, a detection rule library with custom rules, user behavioral analytics and investigation playbooks. The page also lists attack surface management, SOAR and natural language threat hunting across the packages, and includes Quickstart deployment and training in year 1. Rapid7 reported about 11,800 customers in its third quarter 2026 results, though ARR fell 2.2% year over year to $819.7 million, which we weigh in adoption. The main downsides are that no tier has a public price and EDR and NDR are add-ons. We compared documented features and published prices; we did not run our own tests.

   Strengths

   • +Asset-based pricing avoids per-GB ingest surprises, per Rapid7
   • +Quickstart deployment and training included in year 1
   • +Three clear tiers: Essential, Advanced and Ultimate

   Limitations

   • −No public prices for any tier
   • −Rapid7 reported ARR down 2.2% year over year in Q3 2026
   • −EDR and NDR are add-ons

   SummaryRapid7 Incident Command is the best choice for mid-market teams that want SIEM priced per asset rather than per GB. Ask for all three tiers in the quote, since the feature split is wide.

10. 10

    Blumira

    Cloud SIEM for small and mid-size businesses, priced per employee with a year of log retention.

    7.4overall

    Cloud SIEM for small and mid-size businesses, priced per employee with a year of log retention.

    Best forSmall IT teams that want a SIEM priced per employee instead of per GB

    Blumira is built for small IT teams that will never run a full SOC. Its pricing page lists three editions priced per employee per month: Detect at $12, Respond at $16 and Automate at $21. Blumira counts knowledge workers with a corporate email and device, not the number of admins, so a 50-person company on Detect would pay about $600 a month. All editions include a year of log retention, and the platform ships pre-configured detections, honeypots for lateral movement, and the ability to disable users or revoke sessions from a finding. Respond adds concierge support from 9am to 8pm ET, and Automate adds 24/7 incident support. The downsides are a required one-time onboarding fee of up to $500 on some editions and the lack of a published customer count, so we score adoption conservatively. Per-employee pricing is easy to budget but grows with headcount rather than log volume. We compared documented features and published prices; we did not run our own tests.

    Strengths

    • +Published per-employee prices for three editions
    • +Full year of log retention in the plan
    • +30-day trial of the Automate edition

    Limitations

    • −White glove onboarding is a one-time fee of up to $500 on some editions
    • −Pricing counts all knowledge workers, not just admins
    • −No public customer count to cite

    SummaryBlumira is the best choice for small IT teams that want a predictable SIEM bill because Detect costs $12 per employee per month with a year of retention. Larger SOCs will outgrow its feature set.

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