# Security Onion Pro vs Securonix Unified Defense SIEM: side-by-side comparison (2026) [Security Onion Pro](https://cybersectools.com/tools/security-onion-pro) is a commercial [security information and event management](https://cybersectools.com/categories/security-information-and-event-management-siem) solution by [Security Onion Solutions](https://cybersectools.com/companies/security-onion-solutions). [Securonix Unified Defense SIEM](https://cybersectools.com/tools/securonix-unified-defense-siem) is a commercial [security information and event management](https://cybersectools.com/categories/security-information-and-event-management-siem) solution by [Securonix](https://cybersectools.com/companies/securonix). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Securonix Unified Defense SIEM](https://cybersectools.com/tools/securonix-unified-defense-siem) Best for: One cloud platform for SIEM, UEBA, SOAR and threat intel It makes the list because SIEM, UEBA, SOAR and threat intel come as one cloud platform, so a large SOC can drop several separate products. That fits mid-market and enterprise teams with heavy event volumes. Vista Equity Partners has owned Securonix since 2022, so ask how the ThreatQuotient platform will merge into the main product. From [Best SIEM Solutions for Business](https://cybersectools.com/shortlists/best-siem-solutions), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). Need the answer fast? [Best SIEM Solutions for Business](https://cybersectools.com/shortlists/best-siem-solutions) picks Microsoft Sentinel, Splunk Enterprise Security, CrowdStrike Falcon Next-Gen SIEM and 4 more. ## Side-by-side comparison | | Security Onion Pro | Securonix Unified Defense SIEM | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Security Information and Event Management | Security Information and Event Management | | Verified | No | No | | Deployment type | On-Premises | Cloud | | Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise | | Company | Security Onion Solutions | Securonix | | Headquarters | – | – | ### Use cases and capabilities | | Security Onion Pro | Securonix Unified Defense SIEM | |---|---|---| | NDR | Yes | – | | SSO | Yes | – | | Encryption | Yes | – | | MITRE ATT&CK | Yes | – | | YARA | Yes | – | | Sigma | Yes | – | | Suricata | Yes | – | | Case Management | Yes | – | | AI Copilot | Yes | – | | osquery | Yes | – | | Cloud Native | – | Yes | ### Core features **Security Onion Pro** 10 features listed. Sign in on the page to see them. **Securonix Unified Defense SIEM** 9 features listed. Sign in on the page to see them. ### Integrations **Security Onion Pro** 12 integrations listed. Sign in on the page to see them. **Securonix Unified Defense SIEM** 5 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Security Onion Pro](https://cybersectools.com/tools/security-onion-pro) fits if you need to run it on your own servers. - [Securonix Unified Defense SIEM](https://cybersectools.com/tools/securonix-unified-defense-siem) fits if you want a cloud product. ## Security Onion Pro vs Securonix Unified Defense SIEM FAQ Common questions when comparing Security Onion Pro vs Securonix Unified Defense SIEM for security information and event management. ### What is the difference between Security Onion Pro and Securonix Unified Defense SIEM? **Security Onion Pro**: Commercial license tier adding enterprise features and support to Security Onion NSM/SIEM. Built by Security Onion Solutions. **Securonix Unified Defense SIEM**: Cloud-native SIEM platform with UEBA, SOAR, TIP, and TDIR capabilities. Built by Securonix. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Security Onion Pro and Securonix Unified Defense SIEM? **Security Onion Pro** is made by Security Onion Solutions. **Securonix Unified Defense SIEM** is made by Securonix. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Security Onion Pro a good alternative to Securonix Unified Defense SIEM? Often, yes. Security Onion Pro and Securonix Unified Defense SIEM are both Security Information and Event Management products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Security Onion Pro vs Exabeam New-Scale SIEM](https://cybersectools.com/compare/exabeam-new-scale-siem-vs-security-onion-pro) - [Security Onion Pro vs BluSapphire OnePlatform](https://cybersectools.com/compare/blusapphire-oneplatform-vs-security-onion-pro) - [Security Onion Pro vs BluSapphire SIEMless-SIEM](https://cybersectools.com/compare/blusapphire-siemless-siem-vs-security-onion-pro) - [Securonix Unified Defense SIEM vs Exabeam New-Scale SIEM](https://cybersectools.com/compare/exabeam-new-scale-siem-vs-securonix-unified-defense-siem) - [Securonix Unified Defense SIEM vs BluSapphire OnePlatform](https://cybersectools.com/compare/blusapphire-oneplatform-vs-securonix-unified-defense-siem) - [Securonix Unified Defense SIEM vs BluSapphire SIEMless-SIEM](https://cybersectools.com/compare/blusapphire-siemless-siem-vs-securonix-unified-defense-siem) ## Alternatives to each - [See all Security Onion Pro alternatives](https://cybersectools.com/alternatives/security-onion-pro) - [See all Securonix Unified Defense SIEM alternatives](https://cybersectools.com/alternatives/securonix-unified-defense-siem) --- Source: https://cybersectools.com/compare/security-onion-pro-vs-securonix-unified-defense-siem For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/security-onion-pro.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Security Onion Pro and Securonix Unified Defense SIEM: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md