# lagom/lagom

Reactive Microservices for the JVM

Repository: https://github.com/lagom/lagom
Canonical: https://ross.abutalabs.com/products/lagom
Homepage: https://www.lagomframework.com
Language: Scala
License: Apache-2.0
License Family: permissive
Topics: lagom, distributed-systems, akka, play, java, scala, microservices, reactive, playframework, hacktoberfest
Last push: 2023-08-14T13:43:48+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3845, "days_push": 1115, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2627, forks 618 (observed 2026-08-28T04:07:05.438493+00:00)

## What it is
Lagom is an open-source reactive microservices framework for the JVM, available in both Java and Scala APIs, built on Akka and Play. It provides an opinionated, high-productivity development environment with built-in service discovery, event sourcing, CQRS, and Kafka-based messaging, though it was deprecated in July 2023.

## Use cases
- build reactive microservices on the JVM
- implement event sourcing and CQRS in Java or Scala
- decouple services with Kafka message broker
- run a microservices dev environment with service locator and gateway
- persist entities with Cassandra or relational databases
- learn reactive microservice architecture patterns

## When to choose
- maintaining an existing Lagom codebase through its support window
- studying reactive microservice design and event sourcing patterns
- your organization already has commercial Lightbend support

## When to avoid
- starting a new microservices project (deprecated July 2023, patches end July 2024)
- you want long-term community support or active development
- prefer Akka directly, which now includes most Lagom features
- you need a managed platform (consider Kalix instead)

## Facets
- artifact type: framework
- maturity: abandoned
- function: web-framework, microservices, message-queue, streaming, rpc, service-discovery
- domain: microservices, backend, web-development
- platform: jvm, cross-platform
- tags: reactive, event-sourcing, cqrs, akka, play-framework, kafka, cassandra, deprecated, messaging

## Member repositories
- lagom/lagom (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:05.438493+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 2026-08-30T02:19:44.813139+00:00, confidence not recorded.
  - readme: https://github.com/lagom/lagom (fetched 2026-08-28T04:07:05.438493+00:00, sha 54f4dab0f25f)
  - homepage: https://www.lagomframework.com (fetched 2026-08-29T10:02:50.730238+00:00, sha 265e252ef0e1)
  - site_page: https://www.lagomframework.com/documentation/1.6.x/java/Home.html (fetched 2026-08-29T10:02:50.740858+00:00, sha a08c92e81d79)
  - site_page: https://www.lagomframework.com/documentation/1.6.x/java/api/index.html (fetched 2026-08-29T10:02:50.742488+00:00, sha a020b39daca6)
  - site_page: https://www.lagomframework.com/documentation/1.6.x/scala/Home.html (fetched 2026-08-29T10:02:50.744125+00:00, sha 5dba97e8e832)
  - site_page: https://www.lagomframework.com/documentation/1.6.x/scala/api/com/lightbend/lagom/scaladsl/index.html (fetched 2026-08-29T10:02:50.745692+00:00, sha f654dfee0f2f)
  - site_page: https://www.lagomframework.com/documentation/1.5.x/java/Home.html (fetched 2026-08-29T10:02:50.747314+00:00, sha ee9ec4f8b744)
  - site_page: https://www.lagomframework.com/documentation/1.5.x/java/api/index.html (fetched 2026-08-29T10:02:50.748881+00:00, sha a020b39daca6)
  - site_page: https://www.lagomframework.com/documentation/1.5.x/scala/Home.html (fetched 2026-08-29T10:02:50.750290+00:00, sha c28ecddd27f2)
  - site_page: https://www.lagomframework.com/faq.html (fetched 2026-08-29T10:02:50.739112+00:00, sha 265e252ef0e1)
- Data as of 2026-08-30T08:39:29.467469+00:00.