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Best Cloud SIEM Alternatives to Splunk in 2026

Cloud SIEM platforms deliver security analytics as a fully managed service, eliminating the infrastructure management burden that makes Splunk operationally expensive.

4 Cloud SIEM Platforms, side by side

ToolDeploymentPricing modelOpen source
Sumo LogicCloudIngest-based (per GB/day)—
Datadog SecurityCloudPer-GB analyzed + per-host for additional modules—
Microsoft SentinelCloudPer-GB ingested (with commitment tier discounts)—
SecuronixCloudSaaS—

These platforms scale automatically, require no hardware provisioning, and often integrate tightly with cloud provider ecosystems. They are ideal for organizations that want enterprise SIEM capabilities without dedicated infrastructure teams and are operating primarily in cloud environments.

By use case

Our read on which tool suits which job. Editorial, not paid, and separate from the listing below.

Microsoft shops

Microsoft Sentinel

The strongest choice for Microsoft-centric organizations, offering free ingestion of M365 and Azure logs, built-in SOAR with Logic Apps, and AI-powered detection. Delivers exceptional value when your environment is already invested in the Microsoft ecosystem.

Cloud

DevSecOps teams

Datadog Security

The best option for DevSecOps teams that want security and observability in one platform. Ideal for cloud-native and containerized environments where correlating security events with infrastructure metrics provides faster incident response.

Cloud

Predictable SaaS pricing

Sumo Logic

A strong cloud-native SIEM with transparent per-GB pricing and built-in Cloud SOAR. Best for teams that want straightforward SaaS deployment with unified security and observability analytics without managing any infrastructure.

Cloud

Sumo Logic

SIEM & Security Analytics
Best fit for

Organizations wanting a fully managed cloud SIEM with predictable pricing and no infrastructure to manage

Sumo Logic is a cloud-native machine data analytics platform that provides real-time security intelligence across your entire infrastructure. Its Cloud SIEM solution uses advanced analytics, machine learning, and automated threat detection to help security teams identify and respond to threats faster, with a fully managed SaaS delivery model that eliminates infrastructure management.

Pricing

See the vendor site for current pricing.

Ingest-based (per GB/day)

Deployment

Cloud

Standards & certifications

SOC 2 Type II, ISO 27001, FedRAMP Moderate, PCI DSS

Visit Sumo LogicView listing

Datadog Security

SIEM & Security Analytics
Best fit for

DevSecOps teams that want unified security and observability with deep cloud-native visibility

Datadog Security brings together cloud SIEM, cloud security posture management (CSPM), cloud workload security, and application security into a unified platform alongside Datadog's observability tools. By combining security and observability data, teams can detect threats faster and investigate incidents with full infrastructure context, eliminating the gap between DevOps and security.

Pricing

See the vendor site for current pricing.

Per-GB analyzed + per-host for additional modules

Deployment

Cloud

Visit Datadog SecurityView listing

Microsoft Sentinel

SIEM & Security Analytics
Best fit for

Microsoft-centric organizations wanting a cloud-native SIEM with deep M365 and Azure integration

Microsoft Sentinel is a cloud-native SIEM and SOAR solution built on Azure that delivers intelligent security analytics across the enterprise. It provides AI-powered threat detection, automated response with playbooks, and deep integration with Microsoft 365, Azure, and the broader Microsoft security stack. Sentinel's consumption-based pricing and serverless architecture make it highly scalable.

Pricing

Free 31-day trial (10 GB/day); pay-as-you-go from ~$5.20/GB ingested, with commitment tiers down to ~$2.46/GB at high volume (region-dependent; Microsoft directs to cost estimator/sales for exact rates)

Per-GB ingested (with commitment tier discounts)

Deployment

Cloud

Visit Microsoft SentinelView listing

Securonix

SIEM & Security Analytics
Best fit for

Organizations prioritizing insider threat detection and behavior-based analytics

Securonix is a cloud-native SIEM platform powered by advanced analytics and UEBA (User and Entity Behavior Analytics). It provides threat detection, investigation, and response with built-in SOAR capabilities and a data lake architecture.

Pricing

Contact for pricing

SaaS

Deployment

Cloud

Standards & certifications

SOC 2, HITRUST CSF

Visit SecuronixView listing

Comparisons

Splunk vs Microsoft Sentinel

Choose Microsoft Sentinel if your organization runs on Microsoft 365 and Azure, where free log ingestion and native inte...

Read Comparison

Datadog Security vs Elastic Security

Choose Datadog Security if seamless integration of security and observability is your priority and devSecOps teams that ...

Read Comparison

Datadog Security vs IBM QRadar

Choose Datadog Security if seamless integration of security and observability is your priority and devSecOps teams that ...

Read Comparison

Datadog Security vs Graylog

Choose Datadog Security if seamless integration of security and observability is your priority and devSecOps teams that ...

Read Comparison

Datadog Security vs LogRhythm

Choose Datadog Security if seamless integration of security and observability is your priority and devSecOps teams that ...

Read Comparison

Datadog Security vs Microsoft Sentinel

Choose Datadog Security if seamless integration of security and observability is your priority and devSecOps teams that ...

Read Comparison

Shortlists

Editorial lists and deep dives covering these tools.

Frequently Asked Questions

Cloud SIEMs eliminate infrastructure provisioning, capacity planning, patch management, and upgrade cycles that consume significant operational resources with on-premises Splunk. They scale automatically to handle data spikes, provide built-in high availability, and typically offer faster time-to-value. Many cloud SIEMs also provide consumption-based pricing that can be more cost-effective for organizations with variable data volumes.

For Microsoft-centric organizations, Sentinel can be significantly cheaper. Microsoft 365 and Azure activity logs are ingested for free, which eliminates a major cost component. Third-party data ingestion costs $2.46/GB on pay-as-you-go, with commitment tiers reducing this further. However, costs can escalate quickly with large volumes of non-Microsoft data. Organizations report 30-60% savings compared to Splunk when most of their data comes from Microsoft sources.

Datadog Security is maturing rapidly but is still less feature-complete than Splunk as a standalone SIEM. It excels when security monitoring is combined with infrastructure and application observability, particularly in cloud-native environments. For organizations that need advanced correlation rules, extensive threat hunting, SOAR workflows, and the broadest integration ecosystem, Splunk remains the more capable choice. Datadog is best when unified security-observability context is more valuable than pure SIEM depth.

Start by measuring your daily data ingest volume in GB, then compare against each platform's pricing tiers. Factor in free data sources (e.g., Sentinel's free Microsoft log ingestion), commitment tier discounts, and the cost of any add-on modules. Also account for the operational cost savings from eliminating infrastructure management. Most organizations find that cloud SIEMs are 20-50% less expensive than Splunk at equivalent data volumes, with savings increasing for Microsoft-heavy environments using Sentinel.

View all SIEM & Security Analytics tools

About this listing

Cloud SIEM Platforms tools, compared on public information. The comparison table and the full entries follow our editorial order, with any paid Featured listing shown first and labelled. How we work →