# aeron-io/aeron

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Repository: https://github.com/aeron-io/aeron
Canonical: https://ross.abutalabs.com/products/aeron
Homepage: https://aeron.io
Language: Java
License: Apache-2.0
License Family: permissive
Topics: messaging, java, c-plus-plus, ipc, multicast-streams, c
Last push: 2026-08-26T12:35:43+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 4590, "days_push": 7, "days_rel": 7, "gap_med": 10.0, "n_releases_24m": 47}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 8818, forks 1086 (observed 2026-08-28T04:10:25.868114+00:00)

## What it is
Aeron is an efficient, reliable message transport supporting UDP unicast, UDP multicast, and IPC, with Java, C, and C++ clients. It includes Aeron Archive for recording/replaying streams and Aeron Cluster for fault-tolerant replicated state machines using Raft consensus.

## Use cases
- build low-latency messaging between services over UDP or shared memory
- record and replay message streams for backtesting or recovery
- implement fault-tolerant replicated state machines with Raft consensus
- exchange messages efficiently between processes on the same machine via IPC
- build high-throughput trading or exchange systems
- stream market data via UDP multicast

## When to choose
- you need the lowest, most predictable latency messaging at high throughput
- you're building trading systems, exchanges, or other latency-sensitive infrastructure
- you need efficient same-machine IPC plus network transport in one API
- you need stream recording/replay or fault-tolerant clustering

## When to avoid
- you need a general-purpose broker with rich routing, queues, and broad client-language support like Kafka or RabbitMQ
- your throughput needs are modest and simplicity matters more than latency
- you need messaging over TCP or the public internet rather than UDP/IPC

## Facets
- artifact type: library
- maturity: stable
- function: message-queue, streaming, serialization, networking
- domain: microservices, fintech, performance
- platform: jvm, cpp, c, cross-platform, windows
- tags: udp, ipc, low-latency, high-throughput, raft-consensus, message-transport, sbe, trading-systems, multicast, messaging, real-time, linux, macos

## Member repositories
- aeron-io/aeron (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:25.868114+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 2026-08-29T17:25:05.944584+00:00, confidence not recorded.
  - readme: https://github.com/aeron-io/aeron (fetched 2026-08-28T04:10:25.868114+00:00, sha af584431f645)
  - homepage: https://aeron.io (fetched 2026-08-29T08:25:24.978135+00:00, sha c9134764c9df)
  - site_page: https://aeron.io/docs (fetched 2026-08-29T08:25:24.987577+00:00, sha 27b774026c06)
  - site_page: https://aeron.io/premium-docs (fetched 2026-08-29T08:25:24.989550+00:00, sha 9181d8d30b00)
  - site_page: https://aeron.io/updates?_sft_category=product-features (fetched 2026-08-29T08:25:24.993880+00:00, sha 487f5a4cdb0e)
  - site_page: https://aeron.io/updates?_sft_category=software-release (fetched 2026-08-29T08:25:24.991559+00:00, sha d8407ce3e895)
- Data as of 2026-08-30T08:39:29.467469+00:00.