OSSIM (Open Source) Alternatives (September 2025)

Stay vigilant with LevelBlue's Network Security Monitoring. Real-time insights and proactive defense against threats targeting your network.

Wazuh is a free and open source security platform that unifies XDR and SIEM protection for endpoints and cloud workloads.

FortiSIEM - Fortinet's SIEM solution offers advanced threat protection to organizations. Explore more about Security Information and Event Management (SIEM) Software

Learn about intelligent security information and event management (SIEM) with IBM QRadar SIEM for actionable insight into your most critical threats.

OSSEC is a multiplatform, open source and free Host Intrusion Detection System (HIDS). You can tailor OSSEC for your security needs through its extensive configuration options, adding custom alert rules and writing scripts.

Blumira helps lean IT teams protect their organizations against ransomware and breaches with an open SIEM + XDR platform.

Learn how the LogRhythm SIEM platform effectively unifies log management, security analytics, case management, and incident response.

Explore InsightIDR - Rapid7's next-gen security information and event management (SIEM) solution for a cloud-first era. Start your free trial today!

ArcSight Enterprise Security Manager (ESM) is a powerful SIEM tool that empowers your security operations team with real-time threat detection and native SOAR.

Maximize your security and uptime with Corner Bowl Software, offering cost-effective SIEM, server monitoring, auditing software and compliance training for IT.

Elevate your security with Adlumin XDR and MDR. Get continuous threat detection, incident response, and proactive threat hunting, all with full transparency.

Streamlined Cyber Security Operations, Converged on One Platform. Logpoint's award winning SIEM software is simple, flexible, and scalable.

Logsign's Unified SecOps Platform integrates Next-GEN SIEM, TI, UEBA, and Automated Incident Response to improve enterprise cyber resilience proactively.

Security Log Monitoring collects & tracks incidents in real time, applies advanced analytics, categorizes them by threat & sends them to an expert team for review.

Explore Securonix for comprehensive cybersecurity across SIEM, TDIR, UEBA, and SOAR on a scalable cloud platform. Proven effectiveness with top customer ratings.

Professional network threat detection & cyber security monitoring services are offered by NetWitness. Accelerate threat detection and cyber attack response for your organization's SOC with unparalleled visibility, analytics and automation. Contact us today!

Panther alleviates the pain of traditional SIEM with detection-as-code, a robust security data lake, & flexible scalability. Visit our website for a demo or pricing.

Netsurion's managed XDR solution: 24x7 SOC + open XDR platform in a co-managed service for ultimate flexibility, growth & a secure environment.

Discover Qualys VMDR, the powerful, cloud-based, vulnerability management software redefining cyber risk management. Try it today!

Anomali is a security operations platform harnessing the power of AI to deliver breakthrough threat detection, visibility and cyber exposure management.

EventSentry offers affordable SIEM functionality, rock-solid server monitoring, event log monitoring with AD changes and cyber security tracking.

Optimize operations with cutting-edge SIEM, detailed log management, and robust API security solutions.

Get actionable threat intelligence across cloud, identity, and endpoint. Anywhere you run your business, we got you.

Increase your open source security posture with automated best practices - with a unified workflow for security and developer teams.

Discover how the Qualys Cloud Security Posture Management (CSPM) tool enables you to continuously discover, monitor, and analyze your cloud assets.

Discover the power of cloud-native architecture on Google Cloud. Unlock rapid data ingestion, hyper-fast query performance, and advanced analytics and AI.

Detect threats in minutes, and not days with LMNTRIX Active Defense. LMNTRIX offers XDR, MDR, SOC as a Service, Continuous Monitoring, Threat Hunting & Response

Fluency's SIEM is the only security information event management (SIEM) that creates cases based on behavioral analytics. Fluency's platform results in a small number of cases to be monitored. Alerts are enhanced with machine learning to highlight the highest risk issues. It supports these cases with a click through interface to see the anomalies and feedback loops to remove noise. Fluency is a SIEM designed to capture and scale expertise.

Directory Services Protector (DSP) provides continuous Active Directory threat detection and response, including automated remediation.

Discover Qualys Web Application Firewall, our web app firewall cloud service for scalable, simple, and powerful protection of web applications. Try it today!

ManageEngine's Log360 is a unified SIEM tool with integrated DLP and CASB capabilities that helps security operations centers to detect, respond, triage, and mitigate cyberattacks with advanced security & threat analytics.

Foresite Cybersecurity is a leading provider of managed security and compliance services.

Microsoft Sentinel is a cloud-native SIEM that provides intelligent security analytics for your entire enterprise, powered by AI.

Proactively identify and respond to potential security issues before they cause harm.

Assure Security helps you maintain compliance, stop breaches, protect privacy and limit IBM i security threats by routinely assessing risks.

Trustwave Managed SIEM helps enterprises see through data noise easily, respond to emerging threats quickly, and cost-effectively maximize protection while proving compliance. Whether your challenge is choosing the right SIEM, fully staffing it, containing costs, or keeping up with new threats and compliance requirements, Trustwave can help.

Learn how our experts can make your security program relevant, actionable, and sustainable with a combination of cybersecurity services.

One holistic solution to automate cybersecurity routines. Create incident response plan playbooks and stop breaches immediately.

EventLog Analyzer is an affordable log management & IT compliance software that collects, analyzes, correlates, and archives log data from different devices and application to ensure network security.

Discover our complete, efficient, integrated PCI compliance solution that delivers one holistic view of your IT assets and PCI compliance posture.

Tripwire Enterprise helps accurately identify security misconfigurations and indicators of compromise to reduce your attack surface.

Prioritize critical issues across siloed data sources, validate exposures in real-time, and deploy one-click mitigations to close gaps fast.

Transform your approach to API and AppSec with a single platform approach to detect and remediate vulnerabilities, while protecting vulnerable APIs and web apps.

ExtraHop provides cloud-native cybersecurity solutions to help enterprises detect and respond to advanced threats—before they compromise your business.

Level-up your SAP cybersecurity with Onapsis--trusted by SAP and recognized by Gartner. Protect & optimize your landscape.

Top Cyber Security Company USA - Seceon is a comprehensive top cybersecurity Specialists Companies provides Online managed IT security services in New York, Boston, Massachusetts, USA, India, South Korea, Japan, United Kingdom, Dubai, Sri Lanka, Bangladesh, Turkey, Germany and South Africa & Hong Kong.

CloudWize - a no-code platform that gives you maximum cloud security and compliance from architecture design to runtime.

Cimcor’s File Integrity Monitoring solution, CimTrak, helps enterprise IT and security teams secure critical assets and simplify compliance by enabling...

Enjoy a single pane of glass for all mobile defense projects. Build, monitor, respond w/ 300+ defenses on demand. Protect internal, external apps w/ease.

Attack Surface Management & Dark Web Monitoring made simple. Enter your company name to see what attackers know about you.

Identify, manage, and remediate vulnerabilities and misconfigurations on-prem, in your cloud or containerized infrastructure in a unified view

Challenge, assess, and optimize your enterprise's cybersecurity posture with the number one Exposure Management & Security Validation platform.

Explains what Microsoft Advanced Threat Analytics (ATA) is and what kinds of suspicious activities it can detect

Uptycs protects workloads wherever they run and gives you security visibility from dev to runtime. Reduce risk, vulns & misconfigurations from a single UI.

Continuously minimize cloud attack surface based on runtime insights, while actively adapting runtime security with real risk context.

Protect your business from hackers with our pentesting and cyber security services. Try our platform for free.

Stay on top of security issues with our cloud-based managed cybersecurity system. With forensics, data loss prevention and more, your devices are fully protected.

Sumo Logic provides best-in-class cloud monitoring, log management, Cloud SIEM tools, and real-time insights for web and SaaS based apps.

FourCore ATTACK is an adversary emulation platform to help you maximize your defenses against the imminent threats with threat-informed defense.

Learn why IT and security teams trust Axonius to manage and secure their cybersecurity assets and SaaS apps with SSPM and CAASM solutions in one platform.

Lookout is the cybersecurity platform built to stop modern breaches as swiftly as they unfold, from the first phishing text to the final data grab.

Network security AI built for SMB, enterprise, government, and critical infrastructure. Integrates into your workflow including SIEMs, SOARs, & access via SSO.

Trustwave helps organizations solve threat challenges and close security gaps through a full range of services, including flexible managed offerings, industry-leading technologies and tailored consulting engagements.

The best in business choose BluSapphire for their cybersecurity needs, with threat detection, analysis, response, and remediation, all on one platform. Achieve the highest cybersecurity ops maturity in a matter of days. BluSapphire is fully agentless and automated.

The world’s most formidable cybersecurity based on superior research that’s easy to use. A unique balance of prevention, detection and response.

Confidently and quickly identify threats and maintain cloud security for hybrid environments by using Trend Vision One.

Discover the risks across your attack surface with Halo Security's complete attack surface management platform.

Gain control of your SaaS Security with Adaptive Shield, the best-of-breed SSPM to ensure the highest SaaS security hygiene for your organization.

Manage security operations and automate workflows around threat detection and incident response.

Cloud Optix CSPM to Optimize Cloud Costs and Improve Security. Automated Workload Discovery, Visualization and Guided Remediation. Try Cloud Optix Free.

Xygeni, Secure your Software Development and Delivery. Enhance your ASPM through comprehensive risk assessment, strategic prioritization...

CYREBRO is your online centralized interactive SOC Platform that integrates all your security events with strategic monitoring, threat intelligence and IR.

CloudDefense.AI is an industry-leading multi-layered Cloud Native Application and Protection Platform (CNAPP) that safeguards your cloud infrastructure and cloud-native apps with unrivaled expertise, precision, and confidence.

The most integrated endpoint security platform on the planet delivers cloud-based protection with AI-guided security management, all on a single agent/console architecture.

Protect your data, apps, and infrastructure against rapidly evolving cyberthreats with cloud security services from Microsoft Security.

The Leading Managed Security Platform for the Cyber Resilient Enterprise™, providing advanced threat detection & response capabilities backed by experts.

The SIRP SOAR platform let you take your security investigations from manual to lightning speed in no time.

Streamline time-consuming alert triage & incident response tasks with Intezer’s platform automatically investigating every alert and escalating serious threats.

Empower Your Security Strategy with Appsecure, Your Partner in Offensive Security Services. Trusted globally by Top Brands.

DNIF HYPERCLOUD is a cloud native SIEM, UEBA and SOAR platform that can perform search-analytics at scale.

Revolutionize your endpoint and vulnerability management with Syxsense. Get real-time visibility & control over all your endpoints.

Catch hidden threats on your networks before it's too late with network visibility and advanced analytics from IBM QRadar NDR

Discover Chainguard's hardened, vulnerability-free container images designed to keep your infrastructure secure and efficient.

Continuously expose and mitigate your most relevant known and unknown risks with threat intelligence, tailored to your attack surface.

Arctic Wolf delivers dynamic 24x7 cybersecurity protection tailored to the specific needs of your organization. Ready to boost your security posture?

Get the Qualys EDR tool - our dynamic endpoint detection and response software powered by the Enterprise TruRisk Platform. Try it today!

Experience unparalleled penetration testing with our elite team, dedicated to uncovering vulnerabilities and safeguarding your business assets.

Protect your organisation with LRQA Nettitude’s award-winning Cybersecurity Testing, Management & Consulting. Pen Testing & PCI. Speak to our experts today.

Cloudnosys: Smart cloud security and compliance platform secures your cloud against vulnerabilities, get visibility & control of cloud security & compliance in AWS, Azure & GCP.

CYBERShark provides highly evolved SIEM solutions and cybersecurity services with years of experience. Protecting millions of devices and customers worldwide.

Cisco Vulnerability Management (formerly Kenna Security) delivers risk-based prioritization that predicts exploits, drives down risk, and optimizes resources.

Cyberheals - NextGen Cybersecurity Company Protect your assets with CyberHeals cutting-edge cybersecurity products and services. Safeguard your business today!

Ostendio is the only integrated security and risk management platform that leverages the strength of your greatest asset. Your people.

De-risk your data and deliver new value with Immuta's sensitive data discovery, security and access control, and activity monitoring.

Discover, Understand, Mitigate and Manage your Cyber Risk with CYRISMA - a Comprehensive SaaS Platform for Cost-Effective Cyber Risk Management

Secure your attack surface with automated vulnerability scanning, continuous network monitoring, and proactive threat response in one platform. Try for free.

Cribl is built for IT and Security data and provides a unified data management platform for exploring, collecting, processing, and accessing that data at scale.

Supercharge your team’s capability to tackle threats – from cyber to AI and third party outages, while staying ahead of compliance demands.

From endpoints and networks to emails, identities, and beyond, Heimdal has you covered with advanced detection and response capabilities.