Featured · Primary story

Introducing Apache Unomi 4

The major open-source CDP release — Unomi 4.0 runtime, multi-tenancy, stable REST, and a leap in quality. Start here for the full story.

Multi-tenancy — major platform refactor
119/119 OpenAPI paths retained from 2.x
Tests grew faster than production code

Read the Unomi 4 story

Major investment

Multi-tenancy in Unomi 4

A platform-wide refactor — tenant isolation for profiles, events, segments, rules, and schemas, with public and private API keys. One of the largest efforts in Unomi 4.

Read the multi-tenancy post

Go deeper

Second message & upgrades

AI agents

Unomi 4 for AI agents

Privacy-first customer memory — retrieve, store, summarize, and build segments. Unomi is not an LLM; it is the data layer agents plug into.

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API stability and REST compatibility for Unomi 2.x and 3.x

Upgrades

Migrating to Unomi 4

Familiar REST map, additive APIs, and REST compatibility mode for Unomi 2.x and 3.x clients.

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Developer experience

One entry point: build.sh

Preflight, Maven build, integration tests, and deploy — one script locally and on GitHub Actions, with a build.ps1 twin for Windows.

Read the build.sh post

build.sh hub for preflight build test deploy

Documentation

Unomi 4 manual improvements

PlantUML diagrams in AsciiDoc, an Unomi-branded HTML/PDF theme, and deep chapters for migrations, multi-tenancy, upgrades, and conditions.

Read the manual post

Quality · Developer experience

Clearer integration test runs

Live progress bars with ETA, quieter Maven/Docker CI output, and tooling to archive and compare long IT suites — before / after from real GitHub Actions runs.

Read the IT execution post

IT console before and after progress bars

Quality · Unit tests

Faster service unit tests

InMemoryPersistenceServiceImpl — a full PersistenceService on the test classpath so Profile, Event, Rules, and Segment logic runs in seconds without Karaf.

Read the unit harness post

Platform & ops

Runtime, search, shell, scheduler, tracing

Metrics

Inaugural

Welcome to the Apache Unomi Blog

Why this Blog exists, what you will find here, and how we treat history without backfilling a fake archive.

Open welcome post

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Unomi 4 In numbers Multi-tenancy AI agents Migration IT execution Manual build.sh Unit harness Runtime OpenSearch Shell Scheduler Tracing OpenAPI Use cases Events

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