# apache/iggy

Apache Iggy: Hyper-Efficient Message Streaming at Laser Speed

Repository: https://github.com/apache/iggy
Canonical: https://ross.abutalabs.com/products/iggy
Homepage: https://iggy.apache.org
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: messaging, quic, rust, streaming, http, iggy, tcp, apache
Last push: 2026-08-26T20:25:29+00:00

## Health v2 (maintenance only)
Score: 86/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 68, longevity 90
- inputs: {"age_days": 1264, "days_push": 7, "days_rel": 133, "gap_med": 1, "n_releases_24m": 70}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4545, forks 384 (observed 2026-08-28T04:08:53.208907+00:00)

## What it is
Apache Iggy is a high-performance, persistent message streaming platform written in Rust, supporting TCP, QUIC, HTTP, and WebSocket transports with sub-millisecond latency and millions of messages per second throughput. It includes a server with built-in VSR clustering, SDKs for 8 languages, a CLI, Web UI, connector runtime, and an MCP server for LLM integration.

## Use cases
- stream millions of events per second with low latency
- replace Kafka with a lightweight single-binary message broker
- build event-driven microservices with consumer groups and offsets
- ingest data from PostgreSQL or Elasticsearch into streams via connectors
- manage streams and topics from a terminal or web dashboard
- let LLM agents inspect and manage message streams via MCP
- run a fault-tolerant replicated message cluster with VSR consensus

## When to choose
- you need ultra-low-latency, high-throughput persistent message streaming
- you want a single ~20 MB dependency-free binary instead of JVM-based Kafka
- you need multiple transport options (TCP, QUIC, HTTP, WebSocket) and many language SDKs
- you want built-in clustering with Viewstamped Replication and deterministic simulation testing

## When to avoid
- you need battle-tested 1.0 production guarantees - Iggy has not reached a 1.0 release yet
- you rely on the Kafka ecosystem and wire-compatible clients - the Kafka gateway is still in development
- you need a mature connector ecosystem comparable to Kafka Connect
- you require features like exactly-once transactional semantics across external systems

## Facets
- artifact type: service
- maturity: active
- function: message-queue, streaming, http-server, rpc, cli, mcp, etl
- domain: microservices, backend, developer-tools, self-hosted
- platform: windows, rust, cross-platform, self-hosted
- tags: message-streaming, quic, tcp, websocket, io-uring, thread-per-core, vsr-consensus, kafka-alternative, event-streaming, connectors, web-ui, sdk, messaging, real-time, linux, macos, docker

## Member repositories
- apache/iggy (main) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:53.208907+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 2026-08-29T18:20:06.955881+00:00, confidence not recorded.
  - readme: https://github.com/apache/iggy (fetched 2026-08-28T04:08:53.208907+00:00, sha 5cd4c88ecc54)
  - homepage: https://iggy.apache.org (fetched 2026-08-29T09:05:54.678997+00:00, sha b5a4a30ea78c)
  - site_page: https://iggy.apache.org/docs (fetched 2026-08-29T09:05:54.681655+00:00, sha 32b3e41d2681)
  - site_page: https://iggy.apache.org/docs/introduction/getting-started (fetched 2026-08-29T09:05:54.683452+00:00, sha d1c4c2ffd48e)
  - site_page: https://iggy.apache.org/docs/clustering/vsr (fetched 2026-08-29T09:05:54.685743+00:00, sha 41186ada5ce9)
  - site_page: https://iggy.apache.org/docs/sdk/rust/high-level-sdk (fetched 2026-08-29T09:05:54.687478+00:00, sha 50d1c23de16f)
  - site_page: https://iggy.apache.org/docs/connectors/introduction (fetched 2026-08-29T09:05:54.690005+00:00, sha 4d254eeb1044)
  - site_page: https://iggy.apache.org/docs/ai/mcp (fetched 2026-08-29T09:05:54.692587+00:00, sha fdbf238ed34f)
  - site_page: https://iggy.apache.org/docs/web_ui/start (fetched 2026-08-29T09:05:54.694670+00:00, sha 72d9aec722f0)
  - site_page: https://iggy.apache.org/docs/cli/start (fetched 2026-08-29T09:05:54.696561+00:00, sha 5bd79bb18fd0)
- Data as of 2026-08-30T08:39:29.467469+00:00.