IronMQ

What IronMQ is

IronMQ is a persistent message queue for communication between services and components in distributed applications. It supports push and pull queues, long polling, error queues, alerts, triggers, and dead-letter queues, with ordering guarantees within each queue. The maker describes delivery as best-effort and one-time, a behavior teams should account for in message handling. IronMQ uses HTTPS and REST APIs and supports HTTP/REST, Amazon SQS, and OpenStack Marconi protocols. Queues can point to alternative availability zones during an outage without code changes. Deployment options include shared, dedicated, and on-premise environments. Documentation lists client libraries for Go, Ruby, .NET, Java, PHP, Python, Node, and Rust, alongside community-supported Apache Camel and Clojure libraries. Iron.io says OAuth authentication and SSL protect data in transit, and recommends client-side encryption for especially sensitive payloads stored at rest. The free Basic plan includes 100K API requests per month, limited queues, and a 64k message size limit; overage charges apply above plan request amounts. A full-feature 14-day trial is available for non-dedicated clusters.