Originally published at https://www.nocobase.com/en/blog/top-10-most-starred-open-source-erp-and-crm-on-github.

In today's article, we're taking a closer look at GitHub's most popular projects among developers.

You might have read numerous "Top 10" articles before, but we’re doing something different—ranking projects purely by actual GitHub stars, ensuring we highlight only those open-source solutions that have proven value and developer approval.

Check out our previous articles:

Today, we're exploring ERP and CRM projects.

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Why combine ERP and CRM into one list?

In practice, ERP and CRM are frequently discussed together in enterprise management. Many teams realize that deploying either ERP or CRM alone isn't sufficient to digitize their entire workflow. Indeed, many open-source projects now integrate features from both:

  • ERP systems incorporate CRM capabilities, managing processes from lead generation to sales.
  • CRM systems enhance functionality with ERP features like inventory management, orders, and financial modules.

By merging these two areas into one guide, we help you identify robust, reputable, and integrated open-source management solutions, simplifying your selection process.

Explore the recommended projects via the links below: https://github.com/topics/crmhttps://github.com/topics/erp

#1: Odoo ⭐️ 42.6k

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Overview

Originally launched as OpenERP in 2005, Odoo has become one of the most established and widely recognized open-source ERP/CRM solutions in the world. Odoo’s modular yet fully integrated architecture handles virtually every key business function, including sales, procurement, inventory, finance, manufacturing, project management, HR, marketing, and e-commerce.

Odoo’s backend is built primarily on Python and PostgreSQL, while the frontend utilizes a custom framework developed in-house. It boasts an extensive ecosystem of plugins and community apps, comprehensive REST API support, and strong customization capabilities—making it ideal for enterprises and development teams that need highly tailored business processes.

Key Advantages

  • Comprehensive Modular Design: From CRM and ERP to website management, e-commerce, and marketing, Odoo modules integrate seamlessly.
  • Active Community & Ecosystem: Over 30,000 community-driven apps and plugins, thorough documentation, and vibrant forums.
  • Extensive Customization: Advanced features include custom forms, workflows, and reporting tools, coupled with well-developed APIs for tailored business needs.
  • Modern User Interface: Industry-leading frontend and mobile-friendly user experience among open-source ERP/CRM tools.
  • Flexible Deployment Options: Available for self-hosted, private, or public cloud deployments, with optional managed hosting provided officially.

Ideal for

  • Medium to Large Enterprises: Ideal for organizations with complex processes, multi-department collaboration, and integrated management requirements.
  • Custom Development Teams: Well-suited for technically capable teams needing extensive customization and plugin development.
  • Incremental System Expansion: Businesses can adopt Odoo module-by-module, starting from CRM and gradually scaling up to a comprehensive ERP suite.

Open Source Status Odoo offers two distinct editions:

  • Community Edition (fully open-source, LGPL v3): Entire source code freely available, suitable for businesses comfortable managing their own integrations and customizations.
  • Enterprise Edition (partially proprietary): Includes advanced reporting, online editing, advanced mobile capabilities, and select plugins available only through paid licensing, without open source access.

For organizations primarily relying on core features and capable of handling their own customizations, the Community Edition is a solid choice. Companies needing comprehensive advanced features must evaluate adopting a hybrid approach—combining free Community features with paid Enterprise functionality.

#2: Twenty ⭐️ 27.7k

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Overview

Twenty is a sleek, modern open-source CRM designed around simplicity, collaboration, and customization. Built with a Node.js, React, and PostgreSQL stack, Twenty covers essential CRM functions like leads, customer management, contacts, and contract tracking.

It particularly shines with its automated workflow engine, highly adaptable data models, and comprehensive open APIs, making it perfect for technically proficient teams aiming for rapid custom development and integration.

Key Advantages

  • Modern Interface: Clean, minimalist UI offering a user experience on par with leading SaaS CRM platforms—intuitive and easy to learn.
  • Automation & Customization: Extensive support for custom data models, dynamic workflows, and automation scripts to accommodate complex business scenarios.
  • API-Driven Architecture: Rich open APIs facilitate easy customizations and smooth third-party integrations.
  • Quick Deployment: Core modules like customer management, contact lists, sales tracking, contracts, and projects are ready out-of-the-box, ensuring rapid setup.

Ideal for

  • Tech-Savvy Teams: Ideal for startups and growing businesses with internal development resources seeking extensive customizability and automation capabilities.
  • Lightweight CRM Needs: Companies prioritizing efficient digitization of sales and customer management without traditional ERP complexity.
  • Self-Hosting & Privacy-Conscious Businesses: Organizations requiring self-hosted solutions for strict data privacy, security, or compliance reasons.

License Overview

Twenty is licensed under the Business Source License 1.1 (BSL-1.1):

  • Fully open-source codebase, available for self-hosting and custom development.
  • Certain restrictions apply for large-scale commercial usage or SaaS deployments, subject to the BSL terms.
  • An official cloud-hosted SaaS version is also available, with advanced features potentially released there first.

Twenty is well-suited for technically adept teams looking for customizable, open-source CRM solutions. For large commercial deployments or redistribution, teams are advised to review the BSL terms carefully and clarify conditions directly with Twenty.

#3: ERPNext ⭐️ 24.7k

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Overview

ERPNext, developed by the Indian company Frappe and released open-source in 2011, is among the world's most active and well-respected open-source ERP platforms. Built upon the in-house Frappe framework (Python, MariaDB/MySQL backend, and JavaScript/React frontend), ERPNext offers immediate usability combined with strong customization capabilities.

The platform seamlessly integrates core ERP and CRM functionalities—covering procurement, inventory, sales, accounting, HR, project management, manufacturing, support, asset tracking, and even website management. It’s especially tailored to SMEs and fast-growing businesses, enabling rapid digital transformation. Its built-in low-code capabilities empower teams to swiftly customize data models and business workflows through intuitive drag-and-drop interfaces and configuration tools.

Key Advantages

  • All-in-One Modules: Fully integrates key ERP and CRM modules, providing unified management of sales, inventory, finance, HR, CRM, projects, and more.
  • Highly Customizable: Intuitive low-code environment allows business users to effortlessly create custom forms, fields, permissions, workflows, and automations.
  • Global & Multi-Company Support: Comprehensive multilingual, multi-currency, and multi-entity features, ideal for international companies and dispersed operations.
  • Genuinely Open-Source: Complete source code available under GPL v3, with flexible deployment options including self-hosting and official cloud services, ensuring no vendor lock-in.

Ideal For

  • Rapidly Growing Businesses: Companies aiming for standardized operations and unified digital management to handle rapid growth.
  • Multinational Operations: Enterprises requiring multilingual and multi-currency support for diverse international operations or multiple subsidiaries.
  • SMEs Seeking Agility: Businesses wanting an ERP that can be quickly deployed and continuously customized, without relying heavily on external technical resources.

Open Source Status

ERPNext is fully open-source under the GPL v3 license, providing unrestricted access to all modules, underlying technologies, and complete source code. Users are free to deploy, customize, integrate, and extend ERPNext, backed by active community support.

While ERPNext officially offers managed cloud hosting services, all core functionalities and code remain openly accessible for self-hosted deployment.

#4: Monica ⭐️ 22.7k

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Overview

Monica is an open-source CRM with a unique niche—it specializes in personal relationship management rather than traditional customer management. Built using PHP (Laravel framework), MySQL, and Vue.js for the frontend, Monica helps users track and manage interactions with friends, family, clients, and business partners. It’s easy to deploy, requires minimal resources, and emphasizes usability over complex enterprise features.

Monica provides focused capabilities such as contact management, tasks, reminders, call logs, and even personal details like gift preferences. Rather than offering comprehensive enterprise CRM functionalities, Monica excels at delivering a personalized experience for managing meaningful connections.

Key Advantages

  • Personal Relationship Management: Ideal for freelancers, consultants, sales professionals, or anyone needing efficient management of numerous personal or professional contacts.
  • User-Friendly Interface: Clean design and intuitive user experience, closely aligned with everyday use cases.
  • Easy & Lightweight Deployment: Clear deployment process, minimal dependencies, and simple resource requirements make it perfect for individuals or small teams looking for quick setup.
  • Multilingual & Export-Friendly: Supports multiple languages and easy data export, ideal for global use and long-term relationship management.
  • Privacy-Focused Design: Prioritizes user privacy and data ownership, making it highly suitable for users concerned about data control and privacy.

Ideal For

  • Individuals & Freelancers: People who want systematic tracking and long-term management of important contacts and relationships.
  • Small Consulting or Service Teams: Ideal for teams needing basic CRM functionalities without the complexity of traditional enterprise-level ERP systems.
  • Privacy-Conscious Users: Users preferring self-hosted solutions to maintain complete data ownership and minimize data security risks associated with SaaS alternatives.

Open Source Status

Monica is fully open-source under the AGPL v3 license. All features and source code are openly available on GitHub, with no restricted commercial functionalities.

  • Supports self-hosting, custom modifications, and extensive personalization.
  • Official Docker images and clear, easy-to-follow deployment guides provided.
  • Officially offers a hosted SaaS version ("Monica Cloud"), but self-hosted users retain complete functionality and full access to the open-source codebase.

#5: Huly Platform ⭐️ 20.6k

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Overview

The Platform, developed by the Human Colossus Foundation, is a next-generation open-source data and relationship management framework. Unlike conventional ERP or CRM solutions, Platform centers around data sovereignty, compliance, and highly adaptable data modeling. It provides enterprises and individuals with a self-controlled, verifiable infrastructure for secure data collaboration.

Built with TypeScript, Node.js, and PostgreSQL, Platform employs a unique "Relation-driven Data Architecture" that emphasizes visual data modeling tools and advanced permission management. Rather than serving as a standalone ERP or CRM, Platform is designed as foundational infrastructure on which customized ERP/CRM or other complex business systems can be built, granting complete control over data flows and business logic.

Key Advantages

  • Data Sovereignty & Compliance: Ideal for sectors with stringent privacy and regulatory requirements (e.g., finance, healthcare), emphasizing secure, compliant data handling.
  • Flexible Data Modeling: Offers extensive tools for metadata management, relational modeling, and granular data permissions, greatly surpassing the rigidity of traditional ERP/CRM modules.
  • Decentralized & Verifiable Framework: Supports decentralized identities and distributed data verification, positioned for emerging Web3 and trusted-computing use-cases.
  • Open & Extensible Architecture: Facilitates easy integration with third-party solutions and allows teams to rapidly develop custom applications and extensions.
  • Transparent, Community-Led Development: Fully open governance model, with project roadmaps and ongoing development processes openly accessible, welcoming community involvement.

Ideal For

  • Highly Regulated Industries: Finance, healthcare, government, or research organizations needing robust control and traceability of data management and permissions.
  • Businesses with Complex Customization Needs: Enterprises seeking to define their own unique data structures and business logic rather than adopting predefined CRM/ERP models.
  • Future-Focused Organizations: Innovative teams exploring decentralized data governance, digital identity, Web3 infrastructure, and emerging data sovereignty trends.

Open Source Status

Platform is fully open-source, licensed under Apache License 2.0, making all core functionalities and source code completely accessible.

Note: Given its role as foundational infrastructure, Platform requires a certain level of technical proficiency, especially in data modeling and custom application development. It is best suited for organizations with well-established technical expertise and the capability for in-house development.

#6: NocoBase ⭐️ 15.5k

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Overview

NocoBase is an open-source no-code/low-code platform known for its highly extensible, data model-driven approach. It empowers enterprises and developers to rapidly build various internal management systems such as CRM and ERP.

Using a Node.js and React tech stack, NocoBase is completely open-source across both frontend and backend. Its standout features include visual data modeling and a robust plugin architecture, enabling non-technical users to build business applications effortlessly, while also offering deep customization capabilities for technical teams.

Centered around customizable data models, NocoBase lets users define their own data structures, workflows, forms, and permission systems. It's perfect for dynamic business environments where rapid adjustments and high-level customizations are frequently needed. Its plugin system easily incorporates advanced functionalities like workflow automation, reporting, and third-party integrations, making it suitable for both rapid deployment and comprehensive enterprise-level expansions.

Key Advantages

  • Highly Flexible & Data-Driven: Effortlessly configure sophisticated data structures, permission controls, and user interfaces without coding; fully open-source for advanced customization.
  • Extensive Plugin Ecosystem: Virtually all features—workflow automation, notifications, integrations, APIs, and storage options—available as plugins, offering great flexibility and custom development potential.
  • Visual Development Experience: Intuitive WYSIWYG interface allows rapid application creation, even for non-technical business users.
  • Comprehensive ERP/CRM Capabilities: Perfect for building not only CRM or ERP but also broader applications like office automation, approval systems, and project management tools.
  • Active & Multilingual Community: Vibrant user communities in Chinese, English, and Japanese, alongside well-maintained documentation and tutorials by an active core team.

Ideal For

  • SMEs and Agile Teams: Businesses looking for rapid, low-cost deployment and flexible, easy-to-adjust business applications.
  • Tech-Savvy Enterprises: Companies seeking self-hosted solutions, emphasizing data privacy, full customizability, and scalable workflows.
  • Diverse Business Application Needs: Teams needing more than traditional CRM or ERP, including OA systems, workflow automation, asset management, and other specialized solutions.

Open Source Status

NocoBase is fully open-source under the AGPL v3 license, providing unrestricted access to core functionalities and foundational plugins, supporting any scale of self-hosted deployments and custom developments.

  • Rapidly growing plugin ecosystem, enabling easy installation, development, and sharing of custom plugins.
  • Official commercial support and premium plugins available; however, core open-source features remain fully unrestricted and usable without hidden limitations.
  • Strong community contributions regularly provide new plugins and industry-specific solutions.

#7: Krayin CRM ⭐️ 14.4k

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Overview

Krayin CRM is a modern open-source CRM built on the Laravel framework, launched by the team behind Bagisto (a popular open-source e-commerce platform). Open-sourced in 2021, Krayin aims to provide SMEs and startups with a free, user-friendly, and easily extensible CRM solution.

Leveraging PHP (Laravel) and MySQL, Krayin benefits from Laravel's powerful extensibility and vibrant ecosystem. It seamlessly integrates with existing PHP applications and supports easy customization. Krayin covers core CRM functionalities including leads, contacts, company profiles, tasks, emails, and scheduling—perfectly suited for startups or growing businesses looking for a cost-effective, self-hosted CRM.

Key Advantages

  • Laravel-Powered Extensibility: Excellent choice for teams familiar with PHP/Laravel, facilitating easy customization and rapid development.
  • Free, Open, and Lightweight: Modern, streamlined interface with clearly defined features, ideal for quick deployment, and supports one-click Docker setups.
  • Simplified CRM Experience: Includes essential CRM features like lead management, contacts, company profiles, task scheduling, and email interactions, intentionally avoiding complexity and bloat.
  • Active Community & Strong Documentation: Driven by the Bagisto team, ensuring active support and well-documented solutions readily available on GitHub and community forums.
  • Ecosystem Compatibility: Seamlessly integrates with related PHP-based open-source projects like Bagisto, enabling unified e-commerce and CRM management.

Ideal For

  • SMEs and Startups: Ideal for businesses with limited budgets and simpler business workflows, wanting quick, affordable, self-hosted CRM implementation.
  • PHP/Laravel Teams: Developers or businesses leveraging PHP/Laravel stacks, aiming for deep integration, custom features, and rapid CRM development.

Open Source Status

Krayin CRM is fully open-source, licensed under MIT. All core functionalities and source code are freely available for commercial usage, customization, and extension.

  • Fully supports self-hosted deployment, custom development, and scalability.
  • Commercial support services are available from the official team, but all core functions remain completely open-source, ensuring equal access for both community and commercial users.

#8: Akaunting ⭐️ 8.6k

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Overview

Akaunting is a popular open-source ERP focused specifically on financial and accounting management for SMEs and freelancers. Launched as open-source in 2017, Akaunting has become widely used globally due to its simplicity, affordability, and robust multilingual capabilities. Built with PHP (Laravel) and MySQL/PostgreSQL, it provides an intuitive, ready-to-use experience ideal for non-technical users.

Core functionalities include accounting, invoicing, income and expense management, reimbursements, asset tracking, inventory, and budgeting. Additional advanced features, such as CRM, payroll, and tax modules, can be easily added through the official app marketplace. Akaunting appeals strongly to users who require structured financial management without the complexity of traditional enterprise-level ERP solutions.

The platform also effectively handles multiple entities, multiple currencies, automated accounting processes, and customizable report exports, making it ideal for businesses operating internationally.

Key Advantages

  • Financial-Centric Simplicity: Easy-to-use, intuitive interface focused purely on financial accounting, making it accessible without specialized accounting expertise.
  • Expandable Modules: Additional features like CRM, inventory, and payroll management can be easily added via the built-in app marketplace, enabling gradual expansion into a lightweight ERP system.
  • Multi-Entity & Multi-Currency: Ideal for companies managing multiple business units or international teams needing centralized financial management.
  • Flexible Deployment Options: Offers both self-hosted installation and cloud-hosted options, providing flexibility in data control and management.
  • Global Community & Rich Ecosystem: Active worldwide user and developer community, with comprehensive multilingual support and a growing plugin ecosystem.

Ideal For

  • SMEs and Freelancers: Cost-effective solution for individuals and small teams needing digitized financial management and regulatory compliance.
  • Startups or Multi-Entity Companies: Organizations requiring unified financial management across diverse business units, with easy scalability as needed.
  • Teams Avoiding Complex ERP: Suitable for those seeking systematic financial control and basic ERP/CRM capabilities, gradually expanding functionality via plugins.

Open Source Status

Akaunting is fully open-source under GPL v3. All core financial features are freely available and unrestricted.

  • Supports completely free self-hosting, customization, and redistribution.
  • Some plugins and official cloud-hosted services require commercial payment, yet this does not affect the integrity or usability of core local functionality.

#9: Grocy ⭐️ 7.5k

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Overview

Grocy is an open-source ERP designed for personal, household, or small-team management scenarios. Open-sourced in 2017, grocy quickly gained popularity within tech and self-hosting communities due to its practicality, simplicity, and engaging user experience. Built with PHP (Laravel) and supporting SQLite/MySQL/PostgreSQL, grocy offers straightforward deployment and minimal resource requirements.

Initially focused on managing household food inventory, grocy has expanded to include features like shopping lists, recipes, household chores, device maintenance schedules, and expense tracking. Essentially a mini ERP, grocy also incorporates basic CRM, inventory, and asset management capabilities, allowing users to manage all household and life-management tasks via web or mobile interfaces.

Key Advantages

  • Lightweight & Simple to Deploy: Quick and easy setup with minimal dependencies; ideal for individual users or small teams looking for low-maintenance self-hosting.
  • Comprehensive Household Management: Covers various household operations, including food inventory, shopping lists, chores, recipes, equipment maintenance, and budget tracking, addressing most routine domestic needs.
  • Privacy & Data Ownership: Completely self-hosted, ensuring user data remains private, with comprehensive import/export and backup features.
  • Extensible via Plugins & APIs: Provides basic API integrations with platforms like Home Assistant for smart-home scenarios, with further extensibility available via community plugins and scripts.
  • Active, Community-Driven Development: Maintained and actively developed by a global community, featuring intuitive user interfaces and multilingual support.

Ideal For

  • Personal and Family Use: Users and households looking to improve domestic efficiency and systematically manage tasks, inventories, and daily operations.
  • Self-Hosting Tech Enthusiasts: Users prioritizing data privacy and open-source control, keen on building personalized household management solutions.
  • Small Teams and Shared Living Spaces: Ideal for shared apartments, dormitories, or small collaborative groups managing communal shopping, budgets, and shared inventories.

Open Source Status

Grocy is fully open-source under the MIT license. All functionalities are freely accessible, with no commercial feature lock-in.

  • Offers unrestricted free self-hosting, customization, and redistribution.
  • Clearly documented and beginner-friendly, without hidden costs or limitations.
  • Continuously updated by the author, with responsive community feedback and contributions.

#10: iDURAR ERP/CRM ⭐️ 7.3k

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Overview

iDURAR is a modern open-source ERP and CRM platform tailored for small and medium-sized businesses. It provides an all-in-one solution to manage customers, sales, procurement, inventory, projects, and financials through a unified interface.

Built with a Node.js (Express) backend, React frontend, and MongoDB database, iDURAR supports full localization and offers both ease of use and customization. Its built-in modules cover end-to-end operations, allowing companies to streamline processes and eliminate data silos.

Key Advantages

  • Integrated ERP & CRM Modules: Includes everything from sales and customer management to inventory, procurement, accounting, and project tracking—no plugins required.
  • Modern Tech Stack: Node.js + React + MongoDB architecture makes the platform API-rich, deployment-flexible, and easy to extend.
  • Global Readiness: Supports multilingual and multi-currency environments, ideal for teams operating internationally.
  • Customizable & Ready-to-Use: Works out of the box with options to tailor forms, fields, and permission settings based on business needs.
  • User-Friendly Design: Clean and intuitive UI inspired by modern SaaS platforms, reducing onboarding time and improving daily usability.

Ideal For

  • Small to Mid-Sized Businesses: Looking to unify operational processes like sales, purchasing, inventory, and finance under one system.
  • Privacy-Focused Teams: Teams preferring self-hosted tools to retain data control and minimize SaaS reliance.
  • Technical Teams: Organizations with in-house development resources seeking a customizable platform they can build upon and integrate with other tools.

Open Source Status

iDURAR is fully open-source under the MIT license. All core features and source code are publicly accessible and free for commercial use.

  • Offers full support for self-hosting, customization, and deployment.
  • Official support and premium services are available but optional—community users have unrestricted access to the complete product.

How to Choose the Best Open-Source ERP/CRM System for Your Needs

After reviewing so many options, it can be difficult to decide which open-source ERP/CRM system is best suited to your business. Each project has its strengths, but the key is finding the one that aligns with your goals. Here's a quick comparison table to help you choose based on common scenarios:

Use Case Recommended Projects Reason
All-in-one ERP and CRM deployment ERPNext, iDURAR, Odoo (Community Edition) Full-featured systems with end-to-end workflow integration, ideal for medium and large enterprises
Comprehensive business processes, limited budget, and strong in-house development NocoBase, iDURAR Fully open-source and modular, excellent for self-hosting and customization
Modern, flexible CRM with great UI Twenty, Krayin CRM Clean interface, focused functionality, and API-first design—perfect for startups
Financial management as a top priority Akaunting Accounting-focused, simple to use, and extendable via plugins into a lightweight ERP
Life/home/shared living management grocy Lightweight, self-hosted, tailored for personal or small-group use—both practical and fun
Need for strict compliance and data sovereignty Platform (HCF) Built with decentralized architecture and compliance features—ideal for future-focused organizations
Freelancers and consultants managing client relationships Monica Personal CRM with privacy at its core—simple, effective, and secure

✅ If you're looking to build a highly customized ERP or CRM system and have the technical expertise, NocoBase and Platform are ideal foundational platforms.

✅ If you’re seeking an easy-to-deploy, reliable solution, ERPNext, iDURAR, and Akaunting offer strong out-of-the-box value.

📌 Final Advice:

While the number of open-source ERP/CRM systems may seem overwhelming, each one reflects a distinct vision of what digital business tools should be. Before choosing, define your priorities—is it cost control, data ownership, customizability, or speed and simplicity?

Once you know what matters most, the right choice will become clear.

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