# message-db/message-db

Microservice native message and event store for Postgres

Repository: https://github.com/message-db/message-db
Canonical: https://ross.abutalabs.com/products/message-db
Homepage: http://docs.eventide-project.org/user-guide/message-db/
Language: Shell
License: MIT
License Family: permissive
Topics: event-store, event-sourcing, event-driven, pub-sub, event-stream, message-queue, postgres
Last push: 2024-04-13T02:28:42+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2463, "days_push": 873, "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 1652, forks 64 (observed 2026-08-28T04:05:17.084215+00:00)

## What it is
Message DB is a fully-featured event store and message store implemented in PostgreSQL, supporting Pub/Sub, event sourcing, streams, categories, and consumer groups. It provides a minimalist alternative to tools like Event Store or Kafka, installable via Ruby gem, NPM module, or shell scripts.

## Use cases
- implement event sourcing on postgres
- build event-driven microservices
- pub/sub messaging without kafka
- store and stream json events
- consumer group processing of message streams

## When to choose
- you want event sourcing backed by plain Postgres with simple hosting
- you need pub/sub and consumer groups without running Kafka or a separate event store
- you want language-agnostic clients since the store is just Postgres

## When to avoid
- you need very high-throughput streaming beyond what Postgres can handle
- you require rich Kafka-style partitioning and ecosystem tooling
- you want a managed event store service

## Facets
- artifact type: library
- maturity: active
- function: message-queue, database, serialization
- domain: databases, microservices, backend, developer-tools
- platform: self-hosted
- tags: event-store, event-sourcing, pub-sub, postgres, event-driven, consumer-groups, eventide, messaging, linux, macos, docker

## Member repositories
- message-db/message-db (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:17.084215+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 2026-08-30T03:45:00.830025+00:00, confidence not recorded.
  - readme: https://github.com/message-db/message-db (fetched 2026-08-28T04:05:17.084215+00:00, sha 39ea6d397e35)
- Data as of 2026-08-30T08:39:29.467469+00:00.