FreeBSD is renowned for security – a commitment strongly backed by the global FreeBSD community.

• Security as standard: With strong security features as standard, FreeBSD’s model aims to minimize the amount of code affecting security. Many services are designed to run with minimal privileges, to limit the damage done in the event of a security breach.
• The complete core operating system is developed in a single repository by a single open source project: The FreeBSD Project develops and maintains the kernel and all the core system components, including its device drivers, userland utilities, and documentation.
• Security and Release process: Security features are incorporated into FreeBSD releases before being announced to provide an effective window against potential common vulnerabilities and exposures (CVE).
• Security Team: The FreeBSD Security Team is responsible for keeping the community aware of bugs, exploits, and security risks affecting FreeBSD and promoting and distributing information needed to run FreeBSD systems safely. The team is also responsible for resolving software bugs affecting FreeBSD’s security and issuing security advisories. 
• The FreeBSD Vulnerability Disclosure Policy: The FreeBSD Security Officer favors full disclosure of vulnerability information after a reasonable delay to permit safe analysis and correction of a vulnerability, appropriate testing of the correction, and appropriate coordination with other affected parties. The Security Officer will notify FreeBSD Cluster Admins of vulnerabilities that put the FreeBSD Project’s resources under immediate danger

Features:

Jails
A unique feature of FreeBSD, increase security by creating operating system-level containerization and partitioning. This allows administrators to create isolated environments separate from the host operating system, which helps prevent security breaches from spreading to other parts of the system.

Caspsicum
Is a security framework that allows developers to create programs that operate within a safe sandbox environment separate and isolated from the rest of their environment to implement security policies and limit the impact of vulnerabilities. 

CheriBSD

Extends FreeBSD to implement memory protection and software compartmentalization, making it more exploitation-resistant. FreeBSD has the most complete implementation of the CHERI framework available.

FreeBSD provides superior performance with a fast, lightweight, and scalable operating system.

Base system: FreeBSD base system is smaller than other operating systems, with only necessary components included, giving it a performance edge.

Features:

TCP/IP
FreeBSD’s TCP/IP stack is native and has less latency and faster response time. Further, FreeBSD offers consistent performance, particularly for network and I/O operations.

The Z File System (ZFS)
Brings a high-capacity fault-tolerant file system with multiple performance benefits to FreeBSD, including pooled storage, end-to-end data integrity, and transactional operation.

FreeBSD’s development process promotes the stability of a complete operating system, making it the choice behind some of the world’s most recognizable and well-known brands.

FreeBSD is a complete operating system, including the FreeBSD kernel, its device drivers, userland utilities, and documentation. FreeBSD is an off-the-shelf package ready to go out of the box. BSD-based operating systems stand out for being complete operating systems.

FreeBSD isn’t just open source; it’s a permissive license and an open governance model that fosters wide adoption and integration into commercial projects.

Use of code: Permissive licenses allow extensive use and modification without imposing stringent conditions.

Distribute in proprietary works: FreeBSD licensing allows using the code and distribution of proprietary products.

Low risk: It’s easy to meet the BSD license reuse requirements. With FreeBSD, the license language must be on everything under the license.