Odoo
All-in-one business management platform with modules for accounting, sales, HR, inventory, and more. Self-hostable or available in the cloud.
Odoo is an open-source alternative to:

Odoo is a comprehensive open-source suite of business applications designed to streamline operations across finance, sales, marketing, HR, and supply chain management.
Key Features
- Modular Design: Choose from over 30+ integrated apps (CRM, Accounting, Inventory, eCommerce, etc.)
- Self-Hosting: Deploy on your own infrastructure or use Odoo's cloud platform
- Customization: Build custom workflows with Odoo Studio or third-party apps
- Industry-Specific Solutions: Pre-configured modules for retail, manufacturing, real estate, healthcare, and more
- Integrated AI: Built-in artificial intelligence for automation and insights
- Multi-Channel Support: POS, live chat, email marketing, and eCommerce tools
- Global Compliance: Supports multiple currencies, languages, and tax regulations
- Community & Enterprise: Free open-source version with optional paid support and features
Tech / Self-Hosting
- Tech Stack: Python, PostgreSQL, JavaScript (Owl framework)
- Self-Hosting: Fully self-hostable with Docker, Kubernetes, or traditional server setups
- Deployment Options: On-premise, cloud (Odoo.sh), or third-party hosting
- Database: PostgreSQL (primary), with support for MySQL and others
- Scalability: Designed for small businesses to large enterprises