1) You need advanced messaging features out-of-the-box
- For requirements such as richer broker semantics, complex enterprise integration, or sophisticated operational controls, Microsoft recommends Azure Service Bus.
2) You require message history, audit trails, or long-term durability semantics
- If application-level persistence and logging are not acceptable, Queue Storage is not intended as an immutable ledger; additional persistence is recommended.
3) You are highly sensitive to request-based billing variance
- High-frequency operation patterns (polling, retries, reprocessing) can increase operational charges; if strict cost predictability is required, evaluate services or deployment models with different cost structures.
4) You require strict ordering guarantees
- Ordering often requires additional application logic or use of a platform that provides stronger ordering and session semantics.