Kai A. Hartung

Kai A. Hartung

BillionMail

BillionMail

The self-hosted email marketing platform with a built-in MTA. A high-risk, high-reward alternative to Mailchimp that offers unlimited sending but requires strict governance oversight.

Listmonk

Listmonk

A high-performance, self-hosted newsletter and mailing list manager that provides enterprise-grade mass-mailing capabilities without the recurring per-subscriber tax.

DocuSeal

DocuSeal

A secure, open-source alternative to DocuSign that enables businesses to automate document workflows and legally binding signatures with full data sovereignty.

Odoo

Odoo

The giant of Open Source ERPs. Powerful but complex, with a significant feature gap between the Free Community edition and the Paid Enterprise version.

NocoDB

NocoDB

The 'Bring Your Own Database' Airtable alternative. Turn any MySQL, Postgres, SQL Server, or SQLite database into a smart spreadsheet.

ERPNext

ERPNext

The 100% Open Source alternative to Odoo. A monolithic ERP with Accounting, HR, and Manufacturing included out of the box.

Blinko

Blinko

An open-source, AI-first personal knowledge management tool featuring RAG-powered recall and a sovereign second brain architecture.

Directus

Directus

The open-source data platform. A headless CMS and backend-as-a-service that instantly turns any SQL database into a powerful API and management app.

Wazuh

Wazuh

The open-source standard for endpoint security and threat intelligence. A unified platform for SIEM, XDR, and integrity monitoring.

Typesense

Typesense

The lightning-fast, open-source search engine. A C++ based, in-memory alternative to Algolia and Elasticsearch designed for developer speed.

Saleor

Saleor

The headless, high-performance commerce platform built on GraphQL. The modern, API-first alternative to Shopify Plus and Magento for omnichannel retail.

Pimcore

Pimcore

The unified open-source platform for PIM, DAM, CMS, and MDM. A powerhouse for enterprises managing complex product data and omnichannel retail.

Snipe-IT

Snipe-IT

The industry standard open-source IT Asset Management (ITAM) system. It replaces messy spreadsheets with a powerful platform for tracking hardware.

Uptime Kuma

Uptime Kuma

A fancy, self-hosted monitoring tool that provides high-visibility service tracking and alerting. It offers a modern alternative to proprietary uptime services.

Authentik

Authentik

A versatile, open-source identity provider that unifies authentication and authorization. Serve as 'authentication glue' for SSO and MFA.

n8n

n8n

A powerful, self-hostable workflow automation tool that serves as a fair-code alternative to Zapier, allowing technical teams to connect apps and AI agents with total data sovereignty.

Appwrite

Appwrite

A self-hostable backend-as-a-service platform that provides developers with all the core APIs required to build modern applications, offering a secure, open-source alternative to Google Firebase.