Freedom251 › Intrusion Detection and Prevention Software
Atomic OSSEC
What Atomic OSSEC is
Atomic OSSEC is an endpoint detection and response system that also protects cloud workloads and APIs. It monitors intrusions, file integrity, logs, active responses, and vulnerabilities. A graphical interface centralizes agents, servers, events, file-integrity checks, rollbacks, and third-party connections. The pricing page lists more than 5,000 preconfigured OSSEC rules, while named SIEM integrations include Splunk, ArcSight, ELK, and QRadar. Atomic OSSEC supports AWS, Azure, and GCP workloads and offers compliance reporting for PCI DSS, HIPAA, NIST, GDPR, CIS, and other frameworks. Deployment can be on premises or cloud SaaS, including air-gapped environments. The maker also describes support for legacy and end-of-life systems, including Windows, Linux, AIX, HP-UX, and Solaris, plus agentless monitoring of operational technology equipment. Authentication includes two-factor authentication, hardware keys, and SSO integrations. A 14-day trial covers up to 10 licenses without a credit card. Pricing starts at $5/mo; a listed plan is $55 per agent with bulk discounts.
Who it suits
It suits organizations managing security and compliance across cloud, datacenter, legacy, or operational-technology environments. Its Windows, Linux, macOS, web, and self-hosted options support varied deployments.
What it does well
- Cloud workload protection for AWS, Azure, and GCP
- More than 5,000 preconfigured OSSEC rules
- Named integrations with four SIEM platforms
- Air-gapped and on-premises deployment options
- 14-day trial for up to 10 licenses
What to know first
- No free plan
- Listed plan costs $55 per agent
- Support is ticket-based from a small team
Limits
There is no free plan. The free trial lasts 14 days and supports up to 10 licenses; paid pricing is listed from $5/mo, while plan details show $55 per agent with bulk discounts available.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Atomic OSSEC | Pricing starts at $55 per agent; bulk discounts available. · per agent · bulk discounts available | $55 |
As atomicorp.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the Atomic Enterprise OSSEC website.
- Choose between on-premises deployment and cloud-based SaaS.
- Use the free 14-day trial for up to 10 licenses without a credit card.
- Deploy on Linux, macOS, self-hosted, web, or Windows environments.
- Connect supported SIEM integrations such as Splunk, ArcSight, ELK, or QRadar.
Verdict
Atomic OSSEC combines endpoint monitoring, cloud workload protection, compliance reporting, and centralized administration. It is aimed at organizations needing broad deployment and integration choices, with paid pricing and no free plan.
Questions
Is Atomic OSSEC free?
No. It has a paid pricing model and no free plan.
Is there a free trial?
Yes. The trial lasts 14 days, covers up to 10 licenses, and does not require a credit card.
How much does Atomic OSSEC cost?
Pricing is listed from $5/mo. Plan details also show $55 per agent, with bulk discounts available.
What platforms does it support?
Listed platforms are Linux, macOS, self-hosted, web, and Windows. The maker also describes support for legacy systems including AIX, HP-UX, and Solaris.
Can it run on premises or in an air-gapped environment?
Yes. Deployment options include on premises and cloud-based SaaS, and it can run in air-gapped environments.
Which SIEM integrations are named?
The product page names Splunk, ArcSight, ELK, and QRadar as out-of-the-box integrations.
Facts from Atomic OSSEC's own pages
- Authentication
- The comparison lists two-factor authentication and hardware security key integration with YubiKey and Google Titan, plus SSO integrations including Google and Microsoft. · atomicorp.com, 8 Oct 2026
- Cloud
- The product page lists AWS, Azure, and GCP support and says Atomic OSSEC protects cloud workloads and APIs. · atomicorp.com, 8 Oct 2026
- Compliance
- The maker describes compliance reporting for PCI DSS, HIPAA, NIST, GDPR, CIS, and other frameworks. · atomicorp.com, 8 Oct 2026
- Deployment
- Atomic OSSEC is available on premises or as cloud-based SaaS and can run in air-gapped environments. · atomicorp.com, 8 Oct 2026
- Headquarters
- Chantilly, Virginia, United States · atomicorp.com, 28 Sept 2026
- Integrations
- The product page names Splunk, ArcSight, ELK, and QRadar as out-of-the-box SIEM integrations. · atomicorp.com, 8 Oct 2026
- Intended users
- Atomicorp says it serves hundreds of customers worldwide with security and compliance requirements across cloud and datacenter environments. · atomicorp.com, 8 Oct 2026
- Legacy systems
- The maker says the product supports legacy and end-of-life systems, including Windows, Linux, AIX, HP-UX, and Solaris. · atomicorp.com, 8 Oct 2026
- Management
- Its GUI supports centralized management of agents, servers, events, file integrity monitoring, rollbacks, and third-party integrations. · atomicorp.com, 8 Oct 2026
- Monitoring
- It provides intrusion detection, file integrity monitoring, log management, active response, and vulnerability management. · atomicorp.com, 8 Oct 2026
- OT monitoring
- Atomic OSSEC can monitor operational technology environments without installing agents on sensitive equipment. · atomicorp.com, 8 Oct 2026
- Product
- Atomic OSSEC is an endpoint detection and response system and cloud workload protection system. · atomicorp.com, 8 Oct 2026
- Rules
- The pricing page lists more than 5,000 preconfigured OSSEC rules. · atomicorp.com, 8 Oct 2026
- Support
- The maker describes ticket-based support from a small expert team and advertises expert support with its SaaS offering. · atomicorp.com, 8 Oct 2026
- Trial
- The product page offers a free 14-day trial for up to 10 licenses without requiring a credit card. · atomicorp.com, 8 Oct 2026