Snort Alternatives (September 2025)

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.

Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

Cuckoo Sandbox is the leading open source automated malware analysis system.

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

With Verizon's Network Detection & Response (NDR), gain advanced threat intelligence and expert support to protect your business from suspicious activities and cyber attacks.

Elevate your security game with OSSIM. The open-source platform that optimizes threat detection, incident response, & compliance management.

Disrupt future attacks with complete network visibility, next-level analytics, faster investigations, and expert threat hunting.

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

Firedome Curve™ provides organizations with the means to preemptively stop supply chain, insider threat, ransomware, and other complex attacks that might otherwise evade detection by current security protocols and controls

Cisco Secure IPS (NGIPS) provides contextual awareness, security intelligence, and advanced threat protection against attacks and malware.

Protect your network from viruses, malware and malicious activity with GFI KerioControl, the easy-to-administer yet powerful all-in-one security solution

Check Point (IPS) Intrusion Prevention System combines industry-leading IPS protection with breakthrough performance and a stand-alone software solution.

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

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!

Network Traffic Analytics module, a key component of XDR, detects breaches and provides insights into advanced attacks by analyzing network traffic.

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

This data sheet describes the benefits, specifications, and ordering information for the Cisco Threat Defense Virtual (formerly NGFWv) Appliance.

Secure Web Gateway (SWG) solutions use web filtering to enforce company Internet access policies. They also filter unwanted software, especially malware, from user-initiated Internet connections.

PT MultiScanner provides multiple levels of anti-malware protection to detect and block infections on corporate infrastructure, uncover hidden threats, and facilitate investigation of malware-related security incidents.

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

GlassWire is a modern personal firewall and network monitor with over 40 million downloads. Download GlassWire 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.

Muninn offers AI-powered Network Detection & Response to safeguard your enterprise. Experience cutting-edge cybersecurity that evolves with your network.

Find security issues, verify vulnerability mitigations & manage security assessments with Metasploit. Get the world's best penetration testing software now.

Collective Defense for advanced cybersecurity, including behavioral analytics, network detection and response (NDR), and network traffic analysis.

PortSwigger offers tools for web application security, testing, & scanning. Choose from a range of security tools, & identify the very latest vulnerabilities.

BrightCloud® Threat Intelligence Services allow you to overcome the pace of malware creation. Find out why cybersecurity threats can't hide from BrightCloud®.

Home of Kali Linux, an Advanced Penetration Testing Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.

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

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

Make malicious DNS activities visible with AI-powered analysis. Get to know the advanced features of DNSSense closely and protect your organisation from the threats of the cyber world!

Arista NG Firewall simplifies network security with a single, modular, software platform designed to fit the evolving needs of your organization.

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

Cortex XDR is the industry’s only detection and response platform that runs on fully integrated endpoint, network and cloud data. Explore Use Cases for Cortex XDR 3.0.

Experience unrivaled security with Forcepoint Next Generation Firewall (NGFW) Appliances. Stay ahead of cyber threats and secure your network with confidence.

Enterprise-class protection against internet-borne threats and Advanced Web Content Caching with FortiProxy

WildFire leverages a suite of cloud-based malware detection techniques and inline ML to identify and protect against unknown file-based threats.

Learn how Fortinet next-generation firewall (NGFW) products can provide high-performance & consolidated security. Get end-to-end network protection.

FortiAnalyzer delivers high-performance big-data network analytics for large & complex networks and provides better detection & response against cyber risks.

FreeRTOS is an open source, real-time operating system for microcontrollers and microprocessors that makes small, low-power devices easier to program, deploy, and secure.

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

With over 90 million downloads, ZoneAlarm is one of the world's most popular Firewall software products.

Submit malware for free analysis with Falcon Sandbox and Hybrid Analysis technology. Hybrid Analysis develops and licenses analysis tools to fight malware.

Cloud-based malware analysis service. Take your information security to the next level. Analyze suspicious and malicious activities using our innovative tools.

Ranked in the top 5 for efficacy in independent testing, VIPRE Endpoint Security Cloud delivers nextgen antivirus protection and convenience.

CloudGuard network security protects public, private, and hybrid-cloud deployments from advanced threats with the highest catch rate of malware and other attacks.

The 1st Line Of Defense

FortiDeceptor is based on deception-based technology that complements an organization’s existing breach protection strategy, designed to deceive, expose and eliminate attacks originating from either external or internal sources before any real damage occurs.

OpenFOAM is the leading free, open source software for computational fluid dynamics (CFD), owned by the OpenFOAM Foundation and distributed exclusively open source under the General Public...

Managed detection and response (MDR) delivers cybersecurity as a service (CSaaS), with 24/7 ransomware and breach prevention.

Overpower threats, empower IT—reduce the complexity of endpoint security with powerfully simple EDR and MDR solutions.

Protect, monitor, and report on your Azure Virtual Network resources using Azure Firewall, a cloud-native network security and analytics solution.

ManageEngine Firewall Analyzer is an agent-less Firewall, VPN, Proxy Server log analysis and configuration management software to detect intrusion, monitor bandwidth and Internet usage

OpenText EnCase Endpoint Security empowers security analysts with 360-degree endpoint visibility to detect, triage and respond to threats.

Zabbix is a mature and effortless enterprise-class open source monitoring solution for network monitoring and application monitoring of millions of metrics.

Comprehensive user behavior analytics software for insider threat management, data loss prevention, workplace productivity, employee monitoring & more

Netgate is an open-source driven secure networking company that provides appliance and software-based firewall, VPN and routing solutions including pfSense

Discover powerful applications such as Little Snitch Mini, Little Snitch, LaunchBar and Micro Snitch.

DDoS attacks are ever-evolving. FortiDDoS offers an advanced DDoS Protection Solution for enterprise data centers against known and zero-day attacks with low latency.

Unified endpoint and extended detection solutions offering advanced threat protection, rapid response, and comprehensive visibility. FortiEDR is the premier EDR solution tool to eliminate and prevent threats.

Why Falco? Strengthen container security The flexible rules engine allows you to describe …

Snare is the leading security data engine that powers your SIEM. Snare is trusted by over 4,000 customers worldwide.

GnuPG is a free implementation of OpenPGP

We turn crowd-powered intelligence into tactical intelligence with actionable blocklists to maximize your SOC efficiency and reduce your costs.

Sylpheed - Sylpheed はシンプル、軽量かつ高機能で使いやすい、無料のメールソフトです。Sylpheed は Windows から Linux まで様々なプラットフォームに対応しています。

Hillstone Networks’ future-ready Next-Generation Firewall features advanced threat detection and prevention, and smart automated policy operation.

Cyber Triage is automated Digital Forensics and Incident Response (DFIR) software that allows cybersecurity professionals like you to quickly answer intrusion questions related to malware, ransomware, and account takeover.

Network Traffic Analysis and Advanced Sandboxing for rapid network-level threats discovery

Prevent fraud and detect bots confidently with IPQS fraud detection solutions including bot detection, proxy detection, & email validation. IPQS fraud prevention tools detect fraud, bad bots, high risk users, and fraudulent transactions.

In the cloud era, network firewalls must do more than secure your network. They must also ensure you have uninterrupted network availability and robust access to cloud-hosted applications.Barracuda CloudGen Firewall is a family of hardware, virtual, and cloud-based appliances that protect and enhance your dispersed network infrastructure. They deliver advanced security by tightly integrating a comprehensive set of Cloud-Generation firewall technologies, including Layer 7 application profiling, intrusion prevention, web filtering, malware and advanced threat protection, antispam protection, and network access…

Checkmk is a leading tool for Infrastructure and Application Monitoring. Simple configuration, scalable, flexible. Open Source and Enterprise.

Detect targeted attacks and targeted ransomware anywhere in your network.

Emsisoft Anti-Malware for best real-time protection against ransomware and other malware with dual scanner, behaviour blocker and more advanced features.

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

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

An affordable suite of network security services, including hybrid Managed Detection and Response, intrusion prevention, and CINS active threat intelligence.

Cisco ASA 5500 Series Next-Generation Firewalls scale to meet a wide range of needs while providing highly secure, high-performance connectivity.

Vectra AI's Threat Detection and Response Platform protects your business by detecting cyberattacks in real time and responding instantly.

Learn how Netwrix StealthINTERCEPT can help you prevent breaches by spotting threats in real time and proactively blocking critical violations.

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

Ekran System | software to monitor privileged users and audit employee activity, detect insider threats, and protect servers in real time. Try a free demo now!

High performance on-premises appliances that protect organizations across the web, social media, applications and mobile networks.

Exploits are constantly evolving. RASP sits within your app to protect against known and zero-day vulnerabilities — security by default.

IBM Security QRadar XDR is the industry's leading XDR suite that helps you detect and eliminate threats faster. Here's how.

Versa SecureSD-WAN Empowering the future of WAN Edge connectivity with agility, security, and scale GET A DEMO FREE TRIAL Overview Features Plans Resources A comprehensive networking solution Versa Secure SD-WAN is a comprehensive networking solution that provides end-to-end visibility, control, and security for your enterprise's digital transformation. It integrates software-defined networking (SDN) and advanced security

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

Welcome to ZAP!

An open source community working under The Linux Foundation to address storage integration challenges in scale-out cloud native environments. Its vision is to connect siloed data solutions to build a self governed and intelligent data platform.

LibreNMS is an autodiscovering PHP/MySQL-based network monitoring system.

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

Real-time threat detection and response powered by Third-Wave AI for cloud, on-premise, and hybrid environments.

Are you using proper defense techniques to withstand DDoS attacks? DefensePro provides DDoS defense on-premise with a cloud service that's activated on demand.

Intermapper provides industry-leading network monitoring tools for Windows, Linux, and Mac. IT pros love it for its visual, dynamic network maps, real time alerts, and user friendly interface. Start a free 30 day trial.

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.

WordPress security plugin done right: firewall and anti-spam, malware scanner, file recovery & integrity checking

GlobaLeaks - Free and Open-Source Whistleblowing Software

vPenTest is an automated network penetration testing platform that makes pentesting scalable, accurate, faster, consistent, and not prone to human error.

VeraCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux. In case an attacker forces you to reveal the password, VeraCrypt provides plausible deniability. In contrast to file encryption, data encryption performed by VeraCrypt is real-time (on-the-fly), automatic, transparent, needs very little memory, and does not involve temporary unencrypted files.

Flowmon solution provides comprehensive network traffic monitoring with actionable insights relevant to both network and security teams.