ElasticMQ

SoftwareMill · checked 14 Nov 2026

#2 · Cloud Service Emulators

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How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Cloud Service Emulators6.3#2 of 15

ElasticMQ is an in-memory message queue system with an Amazon SQS-compatible interface.

Pricing

ElasticMQ (open-source software)No charge stated · SQS-compatible interface subset · relaxed limits can disable message expiration and size limitsFree

As github.com lists them, checked 14 Nov 2026.

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Runs on

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Facts

Website: github.com
Price: Free tier
Free trial: No
Commercial support: SoftwareMill offers commercial support for ElasticMQ, related technologies, and development services.
Delivery semantics: Messages can be delivered more than once, so clients should be idempotent.
Health check: The server provides a health-check endpoint at /health.
Integrations: ElasticMQ can be accessed using the Amazon Java SDK by changing the endpoint.
Interface: It offers an actor-based Scala implementation and an SQS-compatible REST query interface.
License: The repository identifies its license as Apache-2.0.
Queue behavior: Messages use visibility timeouts and queues or messages can be configured for delayed delivery.
Queue persistence: The Docker Compose setup persists queue data in a named Docker volume.
Run modes: It can run standalone, via Docker, or embedded in an application.
SQS limits: Strict mode validates SQS-style limits; relaxed mode disables checks, including message expiry and size limits unless queue attributes are set.
Use cases: The project describes itself as suitable for testing and for systems intended to work inside and outside Amazon infrastructure.
Web UI: The included web UI supports queue monitoring, queue management, message sending, and real-time queue statistics.

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