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Model SaaS entitlements as durable business data that records what a customer is allowed to use; use feature flags to control how and when capabilities are exposed at runtime. A flag service can evaluate entitlement values, but it should not silently become the authority for plans, contracts, or license rights.
What an entitlement means—and what a feature flag means
An entitlement is a business right or limit a customer receives through a plan, contract, or approved exception. It may be boolean, such as permission to use an API, or quantitative, such as a limit on concurrent meetings. The value should reflect an agreed customer right, not a temporary deployment decision.
A feature flag is a runtime control that determines whether an implementation or capability is exposed to a given context. Teams commonly use flags to release a feature progressively or to control exposure without redeploying. Flags can also return values used by application code, including values that correspond to entitlements.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe concepts overlap in evaluation but have different meanings and lifecycles. A customer’s paid API access is a business fact; enabling a new implementation for a small rollout cohort is a release decision. Treating both as interchangeable makes it harder to tell whether a customer lacks a right or a feature is merely not yet released.
Why pricing tiers should not be just flag targeting
Microsoft’s Azure Architecture Center guidance, updated July 16, 2025, says feature flags can progressively expose new features or versions to tenants without redeployment. But for selectively granting features under pricing tiers, it says flags “aren’t usually the right choice” and recommends building a process to track and enforce each customer’s license entitlements. Microsoft’s multitenant feature-flags guidance
That distinction matters when a customer changes plans, receives an approved exception, or disputes access. The application needs an authoritative account of the right and a way to audit how it was granted. A rollout rule answers a different question: which contexts should receive a capability right now?
Model the domain explicitly
Entitlement
Represent the right or limit in a form the application can enforce: for example, api_access = true or concurrent_meetings_limit = 20. The number is an illustrative model, not a recommended default. Decide whether a value is inherited from a plan, attached directly to a customer, or granted as an exception.
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Customer context
Identify the tenant or customer whose rights are being evaluated, along with relevant attributes such as its plan tier. A customer context connects identity and plan information to the applicable entitlement values. Avoid relying on a client-supplied tier as proof of authorization; resolve or validate the context on a trusted server-side path.
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Feature flag
Use a flag for runtime exposure, such as a progressive rollout, or as a mechanism that returns an entitlement value to application code. In an AWS Partner Network example, LaunchDarkly uses tenant contexts, tier segments, targeting rules, and special-customer overrides. Brian Rinaldi, a Developer Experience Engineer at LaunchDarkly, cautions: “LaunchDarkly is not a tenant management solution, but rather accepts variables representing tenants passed in from your application, which in this example is Amazon Cognito.” AWS Partner Network’s LaunchDarkly multi-tenant example
Choose where rights are owned and evaluated
There is no single persistence design prescribed by the cited guidance. The key is to separate the system that owns contract-derived rights from the mechanism that evaluates or distributes them. Common approaches include:
- Application-owned entitlements: The application or licensing domain stores plan rights and customer assignments, then makes resolved values available to application services. This keeps business ownership close to the product domain, but the team must handle consistent access across services.
- A dedicated entitlement or licensing service: A central service owns rights, exceptions, and resolution. This can provide a clear authority for multiple applications, while adding a service dependency that requires defined availability and failure behavior.
- Flag-platform evaluation: A flag platform evaluates context and returns entitlement-like values. This can combine targeting with rollout controls, but requires explicit ownership for contract data, exceptions, and audit history; a flag platform is not automatically a tenant-management or licensing system.
These are architectural options, not a product ranking. Microsoft’s guidance emphasizes tracking and enforcing license entitlements, while the AWS Partner Network example demonstrates one way to pass tenant attributes into a flag evaluation. Neither establishes a universal storage choice.
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Release flags often exist to manage rollout and may be removed or changed as deployment progresses. Entitlements need to remain stable for as long as the underlying customer right applies. The AWS/LaunchDarkly example recommends permanent flags for entitlements and distinguishes them from release flags; that is a useful warning against treating temporary rollout state as the commercial record. AWS Partner Network implementation example
If a capability is contractually included but temporarily unavailable because of a rollout or incident, preserve that distinction in the system: the entitlement says the customer has the right, while the release or operational control says the feature is not currently exposed. This makes support investigations and later audits easier to interpret.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Enforce entitlements on the server
Hiding a button or page element is not authorization. A user can bypass interface controls and attempt to call an API directly, so server-side operations that consume a paid capability must check the applicable entitlement. The AWS/LaunchDarkly example discusses using the same flags across frontend and backend and handling client-side contexts securely; its practical lesson is to make the trusted backend enforce the right, even when the interface also reflects it.
- Resolve the tenant identity from a trusted authentication context.
- Evaluate the entitlement before performing the protected operation, not only before rendering a control.
- Apply numeric limits at the operation that consumes the quota, with concurrency and boundary behavior defined for the product.
- Ensure that any client-visible context contains only information appropriate to expose, and do not let it override server-side authorization.
Decide the rules before implementation
Whichever architecture you choose, document these decisions so the entitlement model remains operationally clear:
- Authority: Which system owns plan rights, customer assignments, and approved exceptions?
- Audit: How are changes attributed, reviewed, and traced to a contract or approval?
- Value types: Which entitlements are booleans, quotas, or other configurable values, and how are defaults resolved?
- Consistency: How quickly must a plan change reach every service that enforces it?
- Failure behavior: What happens if the evaluation service is unavailable or returns stale data? Choose deliberately rather than allowing a transient rollout control to decide access by accident.
- Ownership: Who maintains release flags, commercial entitlement rules, and customer exceptions?
These questions follow from the separation between license enforcement and rollout targeting; the cited sources do not prescribe universal answers for caching, outages, or approval workflows. The correct policy depends on the product’s security, availability, and contract requirements.
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