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ERPNext

Open source ERP system with billing, accounting, inventory, and CRM all integrated out of the box.

About ERPNext

ERPNext is a full-featured enterprise resource planning system built by Frappe Technologies. It covers accounting, billing, invoicing, inventory management, manufacturing, CRM, project management, and more. Everything comes in one package so you do not need to stitch together separate tools for billing and inventory.

The billing module supports automatic invoice generation, recurring billing, payment reconciliation, and integration with payment gateways like Stripe, PayPal, and Razorpay. Tax rules, currency conversion, and multi-company accounting are handled natively. ERPNext runs on Linux (Debian/Ubuntu) and can be self-hosted or used via Frappe Cloud. The backend uses Python with the Frappe framework and MariaDB.

This tool is ideal for small to mid-sized businesses that want a single system for billing, accounting, and operations. It is fully open source under the GPLv3 license, which means no licensing fees and full control over your data. The project has been actively developed since 2008 and powers thousands of organizations worldwide.
Billing & Automation

Quick Facts

Pricing
Free
License
Open Source
Platform
Linux
Version
14.44.1
Developer
Frappe Technologies Pvt. Ltd.