# Alpakka

Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.

Repository: https://github.com/akka/alpakka
Canonical: https://ross.abutalabs.com/products/akka
Homepage: https://doc.akka.io/libraries/alpakka/current/
Language: Scala
License: NOASSERTION
License Family: other
Topics: integration, reactive, akka, akka-stream, akka-streams-connectors, reactive-streams, messaging, hacktoberfest
Last push: 2026-08-19T12:55:04+00:00
Link (homepage): https://doc.akka.io/libraries/alpakka/current/
Link (site_page): https://doc.akka.io/libraries/alpakka/current/other-docs/index.html
Link (site_page): https://doc.akka.io/libraries/alpakka/current/index.html

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 86, longevity 100
- inputs: {"age_days": 3611, "days_push": 14, "days_rel": 16, "gap_med": 73.5, "n_releases_24m": 9}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1268, forks 630 (observed 2026-08-28T04:04:11.489550+00:00)

## What it is
Akka is a JVM-based platform built on the actor model for building concurrent, distributed, and resilient applications, comprising core libraries, an SDK, and managed operations. Alpakka extends Akka Streams with reactive, backpressure-aware connectors to systems like Kafka, Cassandra, AWS, and AMQP.

## Use cases
- build highly concurrent and scalable services without locks
- build clustered fault-tolerant distributed systems
- stream data with backpressure from Kafka or AWS services
- build reactive event-driven microservices
- process terabyte-scale data streams
- build IoT and edge-to-cloud systems
- implement self-healing high-availability services

## When to choose
- you need high-throughput, low-latency concurrent processing on the JVM
- you want actor-model abstractions for distributed state and messaging
- you need reactive stream integrations with external systems via Alpakka
- you require clustering, elasticity, and multi-region HA

## When to avoid
- you want a simple CRUD web app with minimal complexity
- your team has no appetite for the actor-model learning curve
- you need a permissive open-source license (Akka uses a BSL license)
- you are outside the JVM ecosystem

## Facets
- artifact type: framework
- maturity: active
- function: concurrency, streaming, message-queue, http-server, rpc, microservices, sdk
- domain: microservices, backend, developer-tools
- platform: jvm, jvm-scripting, cloud, self-hosted
- tags: actor-model, reactive-streams, akka-streams, alpakka, kafka-integration, clustering, fault-tolerance, event-driven, real-time, messaging

## Member repositories
- akka/alpakka (main) score 94
- akka/akka-core (main) score 98
- akka/alpakka-kafka (plugin) score 93
- akka/akka-http (plugin) score 90

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:11.489550+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 2026-08-29T17:13:23.250693+00:00, confidence not recorded.
  - readme: https://github.com/akka/alpakka (fetched 2026-08-28T04:04:11.489550+00:00, sha 30fcc05af856)
  - homepage: https://doc.akka.io/libraries/alpakka/current/ (fetched 2026-08-29T08:08:29.545384+00:00, sha 17143b4075d8)
  - site_page: https://doc.akka.io/libraries/alpakka/current/other-docs/index.html (fetched 2026-08-29T08:08:29.550121+00:00, sha ca1b6d121f2f)
  - site_page: https://doc.akka.io/libraries/alpakka/current/index.html (fetched 2026-08-29T08:08:29.548068+00:00, sha 17143b4075d8)
- Data as of 2026-08-30T08:39:29.467469+00:00.