Self-Hosted Apps Built with PostgreSQL

71 self-hostable apps built with PostgreSQL you can run on your own server — compared on specs, deployment difficulty, and the SaaS each one replaces.

Workflow automation

Activepieces

A no-code automation builder positioned as an open-source replacement for Zapier: a visual flow editor, a large library of 'pieces' (connectors) written in TypeScript, and MCP servers in the open core (its AI agents and Chat are paid-layer features). The Community Edition core is MIT-licensed; access control, audit logs, Git sync and multi-project features are sold as paid editions. Runs as one container for hobby use or a four-service compose stack for production.

TypeScriptNode.jsPostgreSQLRedis

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AFFiNE

A workspace that combines documents, whiteboards and databases on one canvas, with a local-first editor and real-time collaboration. The self-hosted server runs with PostgreSQL and Redis; upstream plans for at least 2 GB of RAM.

TypeScriptNode.jsRustPostgreSQLRedis

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AppFlowy

A Notion-style workspace for docs, wikis, kanban boards and databases, with desktop and mobile clients built on Flutter and Rust. The clients are AGPL-3.0, but the self-hosted sync server (AppFlowy Cloud) is now a commercial, closed-source distribution with a free tier limited to one user seat and three guest editors; the open-source AppFlowy-Cloud repository is archived.

FlutterRustPostgreSQL

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Cal.diy

The MIT-licensed community edition of Cal.com, a scheduling platform for booking pages, event types and calendar integrations, with the commercial Enterprise Edition code removed. Upstream recommends it for personal, non-production use.

TypeScriptNext.jsPostgreSQLPrisma

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Chatwoot

A self-hosted Intercom and Zendesk alternative built around one shared inbox for website live chat, email, WhatsApp, Facebook, Instagram, Telegram, LINE, SMS and API channels, with a help center portal, canned responses, automations and CSAT reports. MIT core; SLA policies, Captain AI, custom roles and SSO are in a separately licensed enterprise directory.

RubyRailsVuePostgreSQL

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Discourse

Community forum software built on Ruby on Rails, Ember.js, PostgreSQL and Redis, licensed GPL-2.0-or-later. Chat, polls, solved answers, reactions, assignments and an AI plugin ship in the core repository. The only officially supported install is Docker through the discourse_docker launcher, which builds one container from YAML templates; there is no Compose file.

Ruby on RailsEmber.jsPostgreSQLRedis

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Docmost

A collaborative wiki and documentation tool that positions itself as an open-source alternative to Confluence and Notion: real-time co-editing, spaces, groups and permissions, comments, page history, search, attachments, and built-in Draw.io, Excalidraw, and Mermaid diagrams. The core is AGPL-3.0 and runs as one Node.js container beside PostgreSQL and Redis; Bases (databases), SSO, AI features, audit logs, and SCIM are licensed Business/Enterprise features.

TypeScriptNode.jsPostgreSQLRedis

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Endurain

A self-hosted fitness tracking service: import activities from GPX, TCX and FIT files or sync them from Strava and Garmin Connect, browse them on maps with charts, and follow your own statistics. FastAPI and Vue with PostgreSQL, shipped as one application container.

PythonVuePostgreSQL

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Photo backup & gallery

Ente

End-to-end encrypted photo and video backup — Ente Photos, with its self-hostable server, museum. Files and metadata are encrypted on your device before upload, and face recognition and natural-language search run on your phone or desktop rather than the server. Apps for iOS, Android, desktop and web.

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Forms & surveys

Formbricks

An open-source survey platform for link, website and in-app surveys, with a response dashboard and integrations. The core is AGPL-3.0; enterprise features such as SSO and role management need a paid license key.

TypeScriptNext.jsPostgreSQL

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Personal finance

Ghostfolio

Open-source wealth management for investors — track stocks, ETFs and cryptocurrencies across brokers and exchanges in one private dashboard, with portfolio performance, allocations, benchmarks and a FIRE calculator. A mobile-first web app you can install to your home screen.

TypeScriptNestJSAngularPostgreSQLRedis

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GitLab CE

The whole DevOps platform in one install: repositories, merge requests, issues, a built-in CI/CD runner fleet, container and package registries, and Pages. It is open core — the community edition is MIT, the ee/ directory behind the paid tiers is not — and it is by far the heaviest thing on this list.

RubyGoPostgreSQL

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GoAlert

An on-call scheduling, alerting and escalation tool: define services, on-call schedules with rotations and escalation policies, accept alerts from monitoring through integration keys and notify the person on call, with most settings in an admin page of the web UI. Apache-2.0 Go and TypeScript; a single binary or container that needs only a PostgreSQL database.

GoTypeScriptPostgreSQL

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Social network (Fediverse)

GoToSocial

A lightweight ActivityPub social network server written in Go that federates with Mastodon and the rest of the Fediverse. It has no built-in posting client beyond a basic web view; you use a Mastodon-compatible app to post.

GoSQLitePostgreSQL

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Container registry

Harbor

A full container registry for teams: projects with role-based access, a web UI, image and Helm chart storage, replication to and from other registries, retention and immutability rules, audit logs, robot accounts and optional Trivy vulnerability scanning, all on top of the CNCF Distribution registry. Apache-2.0 licensed and a CNCF graduated project, written in Go with an Angular portal; it runs as a set of containers (core, jobservice, portal, registry, PostgreSQL, Redis, nginx) generated and started by its own installer.

GoTypeScriptPostgreSQLRedisNginx

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Healthchecks

A cron job and background task monitor: your scheduled jobs ping a URL when they finish, and Healthchecks alerts you when the ping does not arrive on time. It watches jobs from the inside — the dead-man's-switch half of monitoring that endpoint checkers miss entirely.

PythonDjangoPostgreSQL

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HedgeDoc

A real-time collaborative Markdown editor: several people edit the same note in the browser at once, and notes can be published as read-only pages or presented as slides. Formerly known as CodiMD.

Node.jsTypeScriptPostgreSQL

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Developer tools

Hoppscotch

An open-source API development workspace that runs in the browser: send REST requests, GraphQL queries, WebSocket, Server-Sent Events, Socket.IO and MQTT connections, organise them into collections and share them with a team. The self-hosted Community Edition is MIT-licensed; SAML single sign-on, OpenID Connect, audit logs and access controls belong to the paid Enterprise Edition.

TypeScriptVueNestJSPostgreSQL

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Secrets management

Infisical

An open-source platform for managing application secrets, certificates and privileged access, with per-environment secret storage, a CLI, SDKs and Kubernetes integration. The core is MIT-licensed; features under the ee/ directories need a paid enterprise license.

TypeScriptNode.jsPostgreSQLRedis

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Joplin Server

The self-hosted sync server for the Joplin note-taking apps, storing notes in PostgreSQL and adding note sharing and multi-user accounts. It is free for personal, non-commercial use under its own license; commercial use needs a separate license.

TypeScriptNode.jsPostgreSQL

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Project Management

Kanboard

Minimalist kanban project management tool with boards, swimlanes, subtasks, time tracking, automatic actions, a JSON-RPC API and a plugin system. Runs on PHP with SQLite, MySQL/MariaDB or PostgreSQL.

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Keila

An open-source newsletter tool with a visual and Markdown campaign editor, sign-up forms, contact segments and campaign analytics. It sends through SMTP or providers such as Amazon SES, SendGrid, Mailgun and Postmark.

ElixirPhoenixPostgreSQL

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Workflow automation

Kestra

An event-driven orchestration platform where workflows are declared in YAML and run by a Java server with a web UI, a scheduler and workers, with plugins for scripts, databases, cloud services and more. The open-source core is Apache-2.0 and runs standalone against PostgreSQL; the Enterprise Edition (RBAC, policies, worker groups and more) is a separate image pulled from Kestra's private registry.

JavaVuePostgreSQL

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Langfuse

An open-source LLM engineering platform: traces for LLM calls and agents, prompt management and versioning, evaluations (including LLM-as-judge), datasets and a playground. Its SDKs and OpenTelemetry ingest feed a Postgres + ClickHouse + Redis + S3-compatible-storage stack, so it is a real multi-service deployment, not a single container.

TypeScriptNext.jsPostgreSQLClickHouseRedis

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Social network (Fediverse)

Lemmy

A Reddit-style link aggregator and discussion forum: users subscribe to communities, post links and discussions, vote and comment. Lemmy instances federate over ActivityPub, so communities can be followed from other Lemmy servers and other Fediverse software.

RustTypeScriptPostgreSQL

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listmonk

A self-hosted newsletter and mailing-list manager distributed as a single Go binary backed by PostgreSQL. It handles subscriber lists, campaigns, templates and transactional mail sent through your own SMTP servers.

GoVuePostgreSQL

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AI Chat Interfaces

LiteLLM

An open-source LLM gateway: one OpenAI-compatible API in front of 100+ providers (OpenAI, Anthropic, Bedrock, Azure, Ollama and more), with virtual API keys, per-key budgets and spend tracking, routing and fallbacks, and an admin UI. It is a proxy for your apps and tools, not a chat interface.

PythonFastAPIPostgreSQL

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AI Chat Interfaces

LobeHub

An AI chat and agent workspace, formerly LobeChat, that connects to OpenAI and many other model providers and supports plugins. The self-hosted server edition keeps its data in PostgreSQL, with Redis and S3-compatible storage (RustFS) alongside. Its community license is Apache-2.0 based, but distributing derivative works needs a commercial license.

TypeScriptNext.jsPostgreSQL

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Logto

An open-source authentication and authorization service built on OIDC and OAuth 2.1, with multi-tenancy, SSO, RBAC and prebuilt sign-in flows for SaaS and AI apps. It runs as a Node.js service on PostgreSQL, with a separate admin console.

TypeScriptNode.jsPostgreSQL

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Social network (Fediverse)

Mastodon

A decentralized microblogging server built on ActivityPub. Each server runs its own community and federates with other Mastodon and Fediverse servers.

RubyRailsNode.jsPostgreSQLRedis

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Mattermost

A polished, Slack-style team chat you fully own — channels, threads, DMs, integrations, and a solid mobile app. The go-to self-hosted Slack replacement for teams that want their messages on their own server. The default Docker image is the Enterprise build: without a licence it runs as the free Entry edition, which keeps only the latest 10,000 channel messages. Set MATTERMOST_IMAGE=mattermost-team-edition in .env for the MIT-licensed Team Edition.

GoReactPostgreSQL

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Medusa

A headless commerce platform and framework for Node.js and TypeScript: products, carts, orders, payments, promotions and regions as modules behind a REST API, with a React Admin dashboard served from the same process. You extend it in code with your own modules, workflows and subscribers, and bring your own storefront (a Next.js starter is optional). It runs on PostgreSQL, with Redis for production. The repository is MIT apart from its Enterprise Edition materials (role-based access control and SSO), which are proprietary.

TypeScriptNode.jsPostgreSQLReact

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Business intelligence

Metabase

A business-intelligence tool for asking questions of your own databases: a point-and-click query builder for people who don't write SQL, a SQL editor for those who do, interactive dashboards, alerts and scheduled dashboard subscriptions. The Open Source edition is AGPL-3.0 and runs as one Java application plus a database for its own data; the Pro and Enterprise editions are a separate image under the Metabase Commercial License.

ClojureTypeScriptPostgreSQL

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Miniflux

A deliberately minimalist RSS reader — a single Go binary backed by Postgres, opinionated, fast, and almost maintenance-free.

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Nhost

Open-source Firebase alternative built on Postgres and Hasura's instant GraphQL API, with authentication, file storage, and serverless functions in one Docker Compose stack.

PostgreSQLHasura

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Low-code internal tools

NocoBase

A data-model-driven no-code and low-code platform: define collections and fields, then compose pages, blocks, workflows and permissions over them in the browser, with a plugin architecture for everything else. The Community Edition is published under the NocoBase License Agreement, which incorporates Apache-2.0 and adds supplementary terms (keep the NocoBase branding, do not offer it as a low-code SaaS); paid Standard, Professional and Enterprise editions lift those limits and add commercial plugins.

TypeScriptNode.jsPostgreSQL

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Odoo

Odoo Community Edition is an open-source ERP suite — invoicing, inventory, manufacturing, CRM, employees and website/e-commerce are all separate apps within one platform, with CRM as just one of those modules rather than a standalone product (full Accounting and Payroll are Enterprise-only). Odoo also sells proprietary Enterprise modules and managed hosting; only the LGPL-3.0 Community Edition is covered here. It runs on the official Docker image with a PostgreSQL backend.

PythonPostgreSQLJavaScript

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OpenPanel

An open-source web and product analytics platform that pitches itself as "the power of Mixpanel with the ease of Plausible": funnels, cohorts, user profiles, session history and replay, A/B tests, revenue tracking, real-time dashboards, and SDKs for web, iOS/Android and server-side events — cookieless. Licensed AGPL-3.0; the documented install clones a dedicated git branch, a setup quiz writes .env, and a start script brings up seven containers (Caddy, PostgreSQL, Redis, ClickHouse, API, dashboard, worker). Free to self-host with unlimited events, per its pricing page.

TypeScriptNext.jsFastifyPostgreSQLClickHouseRedis

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Project Management

OpenProject

Open-source project management software for product, project, and portfolio management. The self-hosted GPL-3.0 Community Edition ships work packages (tasks/subtasks/features/milestones), Gantt charts, agile/kanban boards, Scrum backlogs, time tracking, and a project wiki — TOTP/WebAuthn two-factor authentication is included free; LDAP group sync, SSO, resource management, and custom branding are Enterprise-only add-ons layered on top and aren't part of the free build.

RubyTypeScriptPostgreSQL

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Forms & surveys

OpnForm

A no-code form builder with form logic, file uploads and other input types, embeds, email notifications, captcha protection, form analytics and Slack, Discord and webhook integrations. The core is AGPL-3.0 (the api/app/Enterprise directory carries its own licence); it runs as a Laravel API with a queue worker and scheduler, a Nuxt UI, PostgreSQL, Redis and an nginx ingress in front.

PHPLaravelVueNuxtPostgreSQLRedis

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OroCRM

OroCRM is an enterprise-grade open-source CRM built on Symfony, with workflow automation, marketing-automation tooling, and a B2B-oriented sales pipeline. Oro's dedicated oroinc/crm-application Docker image was discontinued in November 2021 (confirmed via Docker Hub: last push 2021-11-18, and its entrypoint no longer runs at all). Self-hosting OroCRM today means running the actively maintained oroinc/orocommerce-application image from the same official docker-demo compose — OroCommerce is Oro's current platform and bundles the CRM feature set.

PHPSymfonyPostgreSQL

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Papermerge DMS

A document management system for scanned archives: PDF, TIFF, JPEG and PNG in folders, with document versioning, custom fields, document types, tags, page management, users, groups and granular permissions, OIDC single sign-on and a REST API; OCR and full-text search are added as separate worker services. Apache-2.0, Python with a TypeScript front end; the web app runs as one container next to PostgreSQL (SQLite by default, for demos only).

PythonTypeScriptPostgreSQL

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Payload

A code-first headless CMS and application framework that installs into a Next.js app. Collections, access control, an admin panel, and REST, GraphQL and Local APIs are all defined in TypeScript config.

TypeScriptNext.jsReactPostgreSQL

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PeerTube

A self-hosted video hosting and live-streaming platform that federates with other PeerTube instances over ActivityPub. It handles uploads, transcoding, channels and playlists.

TypeScriptNode.jsPostgreSQLRedis

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Project Management

Plane

Open-source project management platform for tracking work items, running sprint cycles, and managing product roadmaps. The self-hosted AGPL-3.0 Community Edition ships work items across five layouts — list, board (kanban), calendar, table, and timeline (a Gantt-equivalent) — plus cycles, modules, saved views, and wiki-style pages; some AI and enterprise capabilities shown on Plane's hosted cloud offering are gated to paid plans and aren't part of the self-hosted Community Edition.

TypeScriptPythonPostgreSQLRedis

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Project Management

PLANKA

Kanban board for teams and personal projects, with projects, boards, lists, cards, labels, due dates, attachments, comments and real-time updates. Source-available under the PLANKA Community License (a fair-use license): free for personal use, internal use within your own organization and non-profits, but hosting it for third parties for commercial gain needs a paid commercial license.

JavaScriptReactSails.jsPostgreSQL

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Plausible

Lightweight, privacy-friendly web analytics in a single dashboard — no cookies, no personal data, GDPR-friendly by default. The Google Analytics replacement you can actually read.

ElixirClickHousePostgreSQL

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PostHog

An all-in-one product analytics suite: event and funnel analytics, session replay, feature flags, A/B experiments, surveys, error tracking and a SQL data warehouse behind one SDK. The self-hosted 'hobby' deploy puts the whole platform on one server, about 36 containers including ClickHouse, PostgreSQL, Redpanda (Kafka-compatible), Redis, Elasticsearch, Temporal and Caddy; PostHog's docs ask for 4 vCPU, 16 GB of RAM and more than 30 GB of storage. Self-hosting is free-plan features only, with no support and no tagged releases. The code is MIT, except the ee/ directory, which is under PostHog's proprietary enterprise licence.

PythonDjangoTypeScriptRustClickHousePostgreSQLKafka

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Password manager

Psono

An end-to-end encrypted password manager aimed at IT teams, pairing a Django/PostgreSQL server with browser extensions and a built-in admin portal. The community edition has no user cap; SSO, audit logging, and policy enforcement live in the enterprise build.

PythonDjangoPostgreSQL

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Rallly

A meeting-poll tool: create a poll with candidate dates and times, share the link, and participants vote on when they are available. Sign-in uses email magic links.

TypeScriptNext.jsPostgreSQLPrisma

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Rybbit

An open-source, privacy-friendly Google Analytics alternative that goes further than a pageview dashboard: sessions, unique users, bounce rate, real-time view, goals, retention, user journeys, funnels, session replays, custom events with JSON properties, and country → region → city maps — no cookies. Licensed AGPL-3.0 and installed by one setup script that starts Caddy, ClickHouse, PostgreSQL, Redis and the two app containers; it needs a domain pointed at the server because its tracking script must be served over HTTPS.

TypeScriptClickHousePostgreSQLRedis

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Saleor

A headless, GraphQL-first commerce platform: products and variants, multi-channel and multi-currency selling, checkout, orders, warehouses and promotions, run from a React admin Dashboard. The stack is a Python and Django API, Celery workers, PostgreSQL and a Redis-compatible cache; it ships the API and Dashboard, not a customer-facing storefront, so you build or adopt one against the GraphQL API. The API and the Dashboard are both BSD-3-Clause.

PythonDjangoGraphQLPostgreSQLCelery

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Sentry

The full self-hosted edition of Sentry's error tracking and performance monitoring: exceptions, stack traces, releases, alerts, tracing, session replay and profiling, using the same SDKs as the hosted product. The upstream self-hosted repository is a Docker Compose blueprint of about 50 containers (Kafka, ClickHouse, Postgres, Snuba, Relay and more) licensed under the Functional Source License (FSL-1.1-Apache-2.0) — source-available, converting to Apache 2.0 after two years — and it needs 4 CPU cores and 16 GB of RAM at minimum.

PythonDjangoRustClickHousePostgreSQLKafka

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solidtime

A modern open-source time tracker for freelancers and agencies: track time against projects, tasks and clients, set billable rates per project, project member or organization, work in several organizations with roles and permissions, and import from Toggl and Clockify. A Laravel application with PostgreSQL; the self-hosting examples run an app, scheduler and queue worker plus Gotenberg.

PHPLaravelVuePostgreSQL

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Strapi

A headless CMS built on Node.js. You design content types in an admin Content-Type Builder, and Strapi generates a REST API, role-based permissions and a media library for them, with GraphQL available as a plugin. It runs as a project you scaffold and deploy yourself.

Node.jsTypeScriptReactPostgreSQL

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Supabase

Postgres-native backend platform bundling auth, realtime subscriptions, storage, and edge functions behind a single API gateway. The open-source Firebase alternative.

PostgreSQLTypeScript

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Business intelligence

Apache Superset

An Apache Software Foundation data-exploration and dashboarding platform: write SQL in a browser editor or build charts without code, assemble them into dashboards, and connect to a wide range of SQL databases. It is a Python (Flask) backend with a React frontend that keeps its own state in a metadata database, and the full feature set also needs a Redis cache and Celery workers. Upstream's Docker Compose setup is for trying it out; its recommended production route is Kubernetes.

PythonFlaskTypeScriptReactPostgreSQLRedis

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SuperTokens

An open-core login provider: the core is a Java service with an HTTP API for sessions, email and password, passwordless and social login, roles and multi-tenancy, which your own backend calls through SuperTokens SDKs while your frontend uses prebuilt sign-in UI. Apache-2.0 outside its `ee/` directory, which is under an enterprise license; this image keeps its data in PostgreSQL.

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Synapse

The reference Matrix homeserver, maintained by Element. It hosts accounts and rooms for the Matrix protocol, which any Matrix client (such as Element) can connect to, and can federate with other Matrix servers.

PythonRustSQLitePostgreSQL

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Project Management

Taiga

Open-source agile project management platform built around Scrum and Kanban, with backlogs, sprints, epics, user stories, issue tracking, and a wiki. The self-hosted stack is the same MPL-2.0 open-source code that powers Taiga's cloud product — self-hosting is free with no project, member, or storage caps and no feature gate; only the hosted cloud plans and an optional paid on-premise support/SLA contract sit on top of the identical software.

PythonAngularJSPostgreSQL

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Workflow automation

Temporal

A durable execution platform: you write workflows as ordinary code with an SDK (Go, Java, Python, TypeScript, .NET and others), and the Temporal Service persists every step of their history so they survive crashes, restarts and long waits, with retries, timers and a web UI to inspect runs. MIT-licensed Go; this install runs the server with PostgreSQL and the UI.

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Low-code internal tools

ToolJet

A low-code platform for building internal tools and workflows on top of your existing databases and APIs, with a drag-and-drop app builder, a built-in ToolJet Database served through PostgREST, and workflow jobs run by a worker. The public repository is AGPL-3.0; its server/ee and frontend/ee directories are Git submodules pointing at separate ToolJet repositories, and the single Docker image runs with a PostgreSQL database.

TypeScriptNestJSPostgreSQLRedis

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Umami

Privacy-focused, cookieless web analytics with funnels, journeys, retention, session replays and heatmaps in the free MIT build. Two containers (Next.js + PostgreSQL) and one script tag to install.

Next.jsPostgreSQL

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Project Management

Vikunja

Open-source to-do and task manager for organizing work across multiple projects, with list, table, kanban, and Gantt-style views, labels, filters, reminders, and recurring tasks. The free AGPL-3.0 self-hosted build ships the full task-management feature set including SSO/LDAP login; a separate self-hosted Pro add-on layers an admin panel, audit logs, and time tracking on top as a paid upgrade and isn't part of the free build.

GoVue.jsPostgreSQL

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wger

Workout and fitness manager: build routines with automatic weight-progression rules, log workouts, body weight and measurements, and track nutrition against the Open Food Facts database. Includes an exercise wiki, a REST API, basic gym-management features and companion apps for Android, iOS and Flathub.

PythonDjangoPostgreSQLRedisCelery

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Wiki.js

A Node.js wiki with a modern admin area, Markdown and visual (WYSIWYG) editors, and a wide set of pluggable modules — local, social, and enterprise auth (LDAP, SAML, OIDC, CAS) with optional 2FA are all part of the free AGPL-3.0 build. It brings its own web server but no database: PostgreSQL is the recommended engine, and the other supported engines are slated to be dropped in the next major version.

Node.jsVuePostgreSQL

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Workflow automation

Windmill

A code-first developer platform that turns scripts in Python, TypeScript, Go, Bash, SQL and more into webhooks, scheduled jobs, flows and internal UIs — the self-hostable alternative to Retool, Pipedream and Temporal rather than a Zapier-style connector catalogue. The core is AGPL-3.0 and the free Community Edition has no execution cap, but it is capped at 50 users and lacks SAML/SCIM, Enterprise-grade audit logs, autoscaling and the forms/prompts layer of approval steps, and the shipped CE image also contains proprietary code.

RustSveltePostgreSQL

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XWiki

A Java enterprise wiki with structured data: pages can carry typed forms and classes, be queried and rendered through scripting, and be extended from an in-app extension manager with hundreds of add-ons. It is LGPL-2.1-or-later and runs in Tomcat against PostgreSQL, MySQL or MariaDB; the official image ships Tomcat, the JDBC driver and LibreOffice for office-document import.

JavaTomcatPostgreSQL

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Zammad

A full ticketing helpdesk under AGPL-3.0, owned by the Zammad Foundation and developed by Zammad GmbH: email, web form, chat widget, SMS, Telegram, WhatsApp and Facebook channels plus CTI phone integrations, with SLAs, time accounting, a knowledge base, core workflows and LDAP. The whole codebase is AGPL-3.0; Zammad GmbH sells hosting and support packages, not a paid edition.

RubyRailsPostgreSQLElasticsearch

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Zipline

A file upload server designed as a ShareX upload target, with a web dashboard, URL shortening, folders, tags, embeds, quotas, invites and an API. It stores uploads on local disk or S3 and uses PostgreSQL for metadata.

TypeScriptReactFastifyPostgreSQL

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Zulip

An open-source team chat server that organizes every conversation into topics within channels, so discussions stay threaded. It ships web, desktop and mobile apps.

PythonDjangoPostgreSQLRabbitMQ

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