QueueSentry

QueueSentry is a web app (with optional lightweight agent) that monitors message queues across Kafka, RabbitMQ, and AWS SQS and tells you when you’re silently losing money: consumer lag spikes, poison-message loops, DLQ growth, schema drift, and retry storms. It focuses on actionable diagnostics instead of yet another dashboard: it correlates producer deploys, consumer errors, and queue metrics into a single incident narrative and suggests the smallest next step (pause consumer group, quarantine message key range, increase partitions, fix visibility timeout, etc.). This is not a generic APM replacement; it’s a queue-first reliability tool for teams that already have logs/metrics but still miss queue-specific failure modes. Expect a hard sell into enterprises with existing observability, but mid-market teams running multiple queues without dedicated platform engineers will pay for fewer outages and faster root-cause analysis.