Self-hosted apps built with Java

Elasticsearch

Search Engines

Distributed search and analytics engine

Replaces Algolia, Splunk

Powerful and easy-to-use open-source website builder

Replaces WordPress, Medium

Keycloak

Identity & SSO

Open-source identity and access management for modern apps

Replaces Okta, Auth0

Microservices and workflow orchestration engine

Replaces AWS Step Functions, Camunda

Tower-defense and factory game with servers

Replaces Factorio

Kestra

Automation & Workflows

Declarative orchestration and scheduling platform

Replaces Zapier, Make

Jenkins

CI/CD & Build

Extensible open-source automation server for CI/CD

Replaces CircleCI

APM and observability for cloud-native architectures

Replaces New Relic, Datadog

ThingsBoard

Home Automation

Open-source IoT platform for device management and data

Replaces AWS IoT, Azure IoT

Distributed tracing system for latency troubleshooting

Replaces Datadog APM

Open-source user authentication you can self-host

Replaces Auth0, Firebase Auth

OneDev

Git Hosting & Forges

Self-hosted Git server with CI/CD and kanban

Replaces GitHub, GitLab

LanguageTool server

Office Suites

Multilingual grammar, style, and spell checker (API)

Replaces Grammarly

Server-side data processing pipeline for logs

Replaces Fluentd

Distributed visual workflow scheduling platform

Replaces AWS Step Functions, Azure Data Factory

Distributed, column-oriented, real-time analytics data store

Replaces ClickHouse

Application performance management for large-scale systems

Replaces New Relic, Dynatrace

OpenSearch

Monitoring & Status

Search and observability suite with logs and dashboards

Replaces Elasticsearch, Splunk

High-performance Minecraft server software

Replaces Vanilla Minecraft server

Enterprise single sign-on server for web applications

Replaces Okta, Ping Identity

SonarQube

Developer Tools & Git

Continuous code quality and security inspection

Replaces GitHub

Multi-cloud continuous delivery platform

Replaces Harness

Lightweight business process engine with BPMN and DMN

Replaces Microsoft Power Automate, Camunda

CompreFace

Video Surveillance

Self-hosted face recognition service with REST API

Replaces Amazon Rekognition

Graylog

Monitoring & Status

Centralized log management and analysis platform

Replaces Splunk, Datadog Logs

Traccar

Maps & GIS

Open-source GPS tracking platform

Replaces Google Maps, Life360

Self-hosted manga reader and downloader server

Replaces ComiXology

Open-source continuous delivery server

Replaces Jenkins

Real-time monitoring system with customizable templates

Replaces Zabbix, Datadog

Flexible API mocking and service virtualization

Replaces Mockoon, Postman Mock

Open-source big data serving engine for search and recommendation

Replaces Elasticsearch, Algolia

GraphHopper

Maps & GIS

Fast and flexible open-source routing engine

Replaces Google Directions API

Visual dataflow automation and routing system

Replaces Azure Data Factory, Zapier

Plain-text and Markdown notes editor for synced folders

Replaces Google Keep, Evernote

Bridge that lets Bedrock players join Java Minecraft servers

Replaces Minecraft cross-play workarounds

Open-source subscription billing platform

Replaces Zuora, Chargebee

Android library for camera capture and streaming apps

Replaces Proprietary camera SDKs

Web browser based IDE for R

Mock and proxy any system you integrate with over HTTP

Replaces WireMock

Fast source code search and cross-reference engine

Replaces GitHub Code Search

Open-source low-latency streaming server

Replaces Wowza, Twitch

Server for sharing and editing geospatial data

Replaces ArcGIS Server

Official Android client for Syncthing sync

Replaces Dropbox, Google Photos

BPMN-based workflow and decision automation engine

Replaces Microsoft Power Automate, AWS Step Functions

Intelligent software supply chain component analysis

Replaces Snyk

Open-source desktop tool for tracking investment portfolio performance

Replaces Sharesight, Personal Capital

Decentralized peer-to-peer web search engine

Replaces Google Search, Bing

Java-based open-source e-commerce and shopping cart software

Replaces Magento, Broadleaf Commerce

Open-source voxel world game and engine

Replaces Minecraft

CommaFeed

RSS & News Readers

Google Reader-inspired self-hosted RSS reader

Replaces Feedly, Google Reader

Foundational open-source text search engine library

Replaces proprietary search SDKs

Web-based SSH console and key management

Replaces Teleport, Termius

In-game map editor for Minecraft single-player and servers

Replaces commercial map editing tools

Fast, typo-tolerant geocoder built on OpenStreetMap

Replaces Google Geocoding API

Real-time collaboration XMPP server written in Java

Replaces Slack, Microsoft Teams

Open-source XMPP chat client for Android with OMEMO encryption

Replaces WhatsApp, Signal

Android client wrapper for continuous Syncthing file synchronization

Replaces Dropbox, Google Drive

3D web-based map renderer for Minecraft worlds

Replaces Dynmap

Multimodal trip planning and transit routing engine

Replaces Google Maps Transit

DLNA-compliant media server for streaming to TVs and consoles

Replaces Plex, Serviio

Universal artifact repository manager

Replaces Artifactory

Secret management and distribution system

Replaces HashiCorp Vault

Open-source Android calendar app that syncs over CalDAV

Replaces Google Calendar

Reitti

File Sync & Storage

A location tracking and analysis application

Open-source document management system for teams

Replaces Evernote, SharePoint

Secure and private space online where you can store, share and view

Open-source ERP for small and midsize companies

Replaces SAP, NetSuite

Highly configurable drop-in replacement for Paper Minecraft servers

Replaces Vanilla Minecraft server

Essential commands and tools plugin for Minecraft servers

Replaces commercial server management plugins

Modern high-performance Minecraft server proxy

Replaces BungeeCord

Graphical SSH and SFTP client with server monitoring

Replaces MobaXterm, Termius

Material You Subsonic music client for Android

Replaces Spotify, Plexamp

Self-hosted server list redirect for Minecraft Bedrock consoles

Replaces Console server restrictions

Independent search engine focused on the non-commercial web

Replaces Google Search

High-performance Java content management system

Replaces WordPress

Self-hosted automation engine for IoT devices

Replaces SmartThings

API mocking and testing for cloud-native development

Replaces Postman Mock, WireMock

Airsonic

Media Servers

Free, web-based media streamer derived from Subsonic

Replaces Spotify

Routing, isochrones, and matrix API on OpenStreetMap

Replaces Google Directions API

IoT Asset management, Flow Rules and WHEN-THEN rules, Data

Enterprise-grade open-source search platform

Replaces Elasticsearch, Algolia

Encrypted file sync to arbitrary storage backends

Replaces Dropbox, SpiderOak

Ticket reservation system

Emulate Philips Hue to control devices by voice

Replaces Philips Hue Bridge

Lightweight Java server software for Minecraft Bedrock Edition

Replaces Minecraft Bedrock Dedicated Server

XWiki

Wikis & Documentation

Advanced enterprise wiki and application platform

Replaces Confluence, Notion

Enterprise learning management system for education

BookLore

E-books & Media Library

Self-hosted web app for organizing and reading ebooks and PDFs

Replaces Kindle, Goodreads

Code review and project management tool for Git-based projects

Anonymously share files, browse and publish _freesites_ (web sites

Enterprise network management and monitoring platform

Replaces SolarWinds, PRTG

Java-based static site and blog generator

Replaces Jekyll, WordPress

openHAB

Home Automation

Vendor-neutral open-source home automation

Replaces SmartThings, Google Home

Powerful enterprise search server easy to deploy

Replaces Google Search Appliance

Apache enterprise resource planning framework

Replaces SAP, Oracle ERP

Desktop project scheduling with Gantt charts

Replaces Microsoft Project

Turnkey repository application providing durable access to digital

Performance-focused Paper fork for Minecraft servers

Replaces Vanilla Minecraft server

Enterprise mail server and SMTP/IMAP platform

Replaces Microsoft Exchange

Self-hosted analytics plugin for Minecraft servers

Replaces Commercial game analytics

Open-source ERP, CRM, and BPM platform

Replaces SAP, Odoo

Hauk

Maps & GIS

Self-hosted real-time location sharing service

Replaces Google Maps location sharing

Self-hosted Q&A platform and Stack Overflow alternative

Replaces Stack Overflow

Open-source identity and access management server

Replaces Okta, ForgeRock

Enterprise document management and content platform

Replaces DocuWare, SharePoint

Peer-to-peer encrypted messaging that works offline

Replaces Signal, WhatsApp

Custom analytics platform with SQL on event data

Replaces Mixpanel, Amplitude

POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users

NPC plugin for Bukkit, Spigot and Paper Minecraft servers

Replaces commercial NPC plugins

Self-hosted bike and hiking route planner

Replaces Komoot, Strava routes

Open-source turn-based colonization strategy game

Replaces Sid Meier's Colonization

Scalable content services and document management platform

Replaces Documentum, OpenText

Video conferencing, instant messaging, whiteboard, collaborative

Community-driven open-source ERP and CRM

Replaces SAP, Oracle ERP

Cloud-native identity and access management platform

Replaces Okta, Auth0

Open-source personal finance manager for Android

Replaces Mint, Wallet by BudgetBakers

Advanced Minecraft server stress-testing and bot framework

Replaces commercial load-testing tools

SIP gateway and transcription bridge for Jitsi

Replaces Zoom Phone

Cross-platform XMPP instant messaging client

Replaces Slack, Skype

Simple repository browser for Git repositories

Replaces GitHub

Flexible and modular backend framework/server for object persistence,

Federated social network with a familiar layout

Replaces Facebook, VK

Open-source identity governance and administration platform

Replaces SailPoint, Saviynt

Open-source API management platform

Replaces Apigee, MuleSoft

Community-feedback tool for managing incoming feedback

Web-based learning management system for institutions

Replaces Moodle, Blackboard

Modding API and plugin platform for Minecraft servers

Replaces Bukkit

Command-line client-side encryption for cloud files

Replaces Boxcryptor

Highly scalable XMPP/Jabber messaging server

Replaces Slack, WhatsApp

Web-based planning and project management

Replaces Microsoft Project

Open-source system for managing digital identities

Replaces SailPoint, Okta

Web-based mind mapping for visual knowledge capture

Replaces MindMeister, XMind

Host and edit single-file TiddlyWiki wikis

Replaces Evernote, OneNote

Robust and modular repository system for the management

Enterprise content and document management platform

Replaces SharePoint, Documentum

Java-based community discussion board

Replaces phpBB

Self-hosted audiobook streaming server with Subsonic API

Replaces Audible

Standards-based SAML identity provider for federations

Replaces Okta, Ping Identity

Manga/comic/light novel media server with clients for Windows, Linux,

The easiest way to share and manage your Git, Mercurial and Subversion

Document management system for businesses

Replaces DocuWare, M-Files

Subsonic music client focused on a clean experience

Replaces Spotify

Slimline self-hosted URL shortener with no bloat

Replaces TinyURL

Privacy-focused XMPP messenger for Android

Replaces WhatsApp, Signal

Enterprise-class CRM and customer management

Replaces Salesforce, Siebel

Reddit-style federated link aggregator backend

Replaces Reddit

Encryption layer and key management for cloud storage

Replaces Boxcryptor

Powerful inventory management system, designed to be flexible

Get a recipe to cook today, based on the ingredients you have at home

Federated XMPP-based social networking server

Replaces Facebook Groups

Cross-platform desktop search for document contents

Replaces Google Desktop

Flightlog, a web application that keeps track of your personal flight

Web-based document management system in Java

Replaces DocuWare

Open-source repository for educational resources

Replaces Canvas Commons

Minimal pastebin supporting client-side encryption, fulltext search,

Metadata manager and organizer for movie and TV libraries

Replaces Plex

Clean startpage that auto-discovers Kubernetes apps

Replaces Google homepage

Powerful CI/CD server from JetBrains

Replaces Jenkins, CircleCI

Document archiving and management with OCR

Replaces DocuWare

Free to use, versatile, lightweight, multi-platform, and secure home

Continuous integration server

Enterprise-level Git solution (alternative to GitLab)

JIRA

Helpdesk & Ticketing

Professional and extensible issue tracker

Peer code review application

Email, calendar, collaboration server with Web interface and lots

Browser-based remote access solution

VoIP troubleshooting and monitoring platform