# softwaremill/elasticmq

In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded.

Repository: https://github.com/softwaremill/elasticmq
Canonical: https://ross.abutalabs.com/products/elasticmq
Homepage: https://softwaremill.com/open-source/
Language: Scala
License: Apache-2.0
License Family: permissive
Topics: scala, sqs-interface, elasticmq, amazon-sqs, aws, aws-sqs, messaging
Last push: 2026-08-26T00:21:36+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 66, longevity 100
- inputs: {"age_days": 5548, "days_push": 8, "days_rel": 150, "gap_med": 41, "n_releases_24m": 12}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2918, forks 203 (observed 2026-08-28T04:07:30.063482+00:00)

## What it is
ElasticMQ is an in-memory message queue system that implements an Amazon SQS-compatible REST interface. It can run stand-alone (including via Docker), embedded in a JVM application, and offers an optional web UI and queue persistence.

## Use cases
- run a local SQS-compatible queue for integration tests
- fake SQS endpoint for local development without AWS
- embed a message queue inside a Scala/JVM application
- test SQS consumer and producer code offline
- develop systems that work both inside and outside AWS infrastructure
- monitor and manage queues via a web UI

## When to choose
- you need an SQS-compatible mock for testing or local development
- you want an embeddable in-memory queue in JVM apps
- you want to run a queue without AWS dependencies

## When to avoid
- you need a durable, production-grade distributed message queue
- you need features beyond the SQS query interface subset
- you need exactly-once delivery guarantees

## Facets
- artifact type: service
- maturity: active
- function: message-queue, http-server, testing
- domain: developer-tools, testing
- platform: jvm, self-hosted, cross-platform
- tags: sqs-compatible, in-memory-queue, localstack-alternative, scala, rest-api, queue-ui, messaging, aws, docker

## Member repositories
- softwaremill/elasticmq (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:30.063482+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:34:03.820763+00:00, confidence not recorded.
  - readme: https://github.com/softwaremill/elasticmq (fetched 2026-08-28T04:07:30.063482+00:00, sha bd5de41e186e)
  - homepage: https://softwaremill.com/open-source/ (fetched 2026-08-29T09:49:18.788550+00:00, sha ebbb9106d79a)
  - site_page: https://softwaremill.com/about-us (fetched 2026-08-29T09:49:18.791435+00:00, sha 3bf9cbf7100c)
  - site_page: https://softwaremill.com/how-we-work (fetched 2026-08-29T09:49:18.793538+00:00, sha 36a836a630d7)
- Data as of 2026-08-30T08:39:29.467469+00:00.