Open Core Model

Expanded Definition

An open core model is a product and licensing structure in which a freely available core handles essential function, while paid layers add enterprise capabilities such as governance, integrations, reporting, support, or policy management. In NHI and identity tooling, the distinction matters because the core may authenticate or broker access, while the commercial layer often adds the controls needed to operate at scale.

Definitions vary across vendors, and the boundary between “core” and “enterprise” is not governed by a single standard. Practitioners should treat the model as an architecture and packaging decision, not as an assurance statement. A platform can be open core and still lack the lifecycle rigor described in NIST Cybersecurity Framework 2.0; the question is whether the paid and unpaid components together support the operational outcomes required for NHI governance.

The most common misapplication is assuming the free core is sufficient for production control, which occurs when organisations deploy it without auditability, rotation, or revocation workflows.

Examples and Use Cases

Implementing an open core model rigorously often introduces a governance split, requiring organisations to weigh lower entry cost and faster adoption against the risk that critical controls sit behind a commercial tier.

• A development team uses the free core to issue service credentials, then adopts a paid module for approval workflows and access reviews when the number of service accounts grows.
• An organisation evaluates whether audit logs, secret discovery, and lifecycle offboarding are in the core product or only available through the enterprise layer, informed by the control priorities in the Ultimate Guide to NHIs.
• A security team keeps policy enforcement in the paid tier but uses the open core for inspection and integration testing, then maps the deployment to NIST Cybersecurity Framework 2.0 functions for review and monitoring.
• A platform owner chooses open core to avoid lock-in while preserving a path to enterprise controls for rotation, revocation, and workflow automation as the NHI estate expands.
• A compliance group pilots the core in a non-production environment to confirm whether the paid layer is required for evidence collection, reporting, or separation of duties.

Why It Matters in NHI Security

Open core can be useful, but it becomes risky when teams mistake feature availability for security maturity. In NHI programs, the core may manage the “how” of access while the paid layer supplies the “proof” of control, including offboarding, rotation, and visibility. That distinction is critical because NHI failures usually emerge at scale, not in small pilots. NHI Mgmt Group reports that only 5.7% of organisations have full visibility into their service accounts, while 80% of identity breaches involved compromised non-human identities such as service accounts and API keys in the Ultimate Guide to NHIs.

That gap matters operationally: if the free layer lacks inventory, policy enforcement, or revocation evidence, organisations can inherit hidden exposure even when authentication appears sound. Open core should therefore be assessed against real NHI outcomes, not marketing language, and aligned to governance expectations in the NIST Cybersecurity Framework 2.0. Organisations typically encounter the true cost of open core only after an incident review reveals that the missing enterprise controls were never activated, at which point the model becomes operationally unavoidable to address.

Related resources from NHI Mgmt Group

• What is the Model Context Protocol (MCP) and why does it matter for security?
• What is the core decision loop Agentic AI follows and why does it create security risk?
• What are the core risks identified by the OWASP Agentic Top 10?
• What does AI model abuse reveal about the current NHI threat surface?