Invary for CIS vs Subgraph Citadel / Subgraph OS: Side-by-Side Comparison (2026)

Invary for CIS: Runtime integrity solution for OS, hardware, and software via CIS partnership. built by Invary. Core capabilities include Runtime integrity measurement of the operating system, Hardware integrity verification, Software integrity verification..

Subgraph Citadel / Subgraph OS: Immutable, compartmentalized Linux OS for adversarial computing environments. built by Subgraph. Core capabilities include Read-only immutable base OS protected by dm-verity cryptographic integrity verification, Unlimited isolated user realms with separate process, network, and filesystem namespaces, Container-based realm isolation using Linux namespaces and cgroups..

Both serve the Workload Protection market but differ in approach, feature depth, and target audience.

Invary for CIS differentiates with Runtime integrity measurement of the operating system, Hardware integrity verification, Software integrity verification. Subgraph Citadel / Subgraph OS differentiates with Read-only immutable base OS protected by dm-verity cryptographic integrity verification, Unlimited isolated user realms with separate process, network, and filesystem namespaces, Container-based realm isolation using Linux namespaces and cgroups.

Invary for CIS is developed by Invary. Subgraph Citadel / Subgraph OS is developed by Subgraph. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Invary for CIS and Subgraph Citadel / Subgraph OS serve similar Workload Protection use cases: both are Workload Protection tools, both cover Operating System, Security Hardening. Key differences: Invary for CIS is Commercial while Subgraph Citadel / Subgraph OS is Free. Review the feature comparison above to determine which fits your requirements.