In today’s competitive digital world, businesses rely heavily on Customer Relationship Management (CRM) software to manage leads, build stronger client relationships, and boost sales performance. While there are many premium CRM platforms available, they often come with expensive licensing fees and limited flexibility. This is why more companies are turning to open source CRM software on GitHub.
The advantage of using open source CRM software is the freedom to customize and scale the platform as your business grows. Whether you are a startup seeking a lightweight CRM or a large enterprise requiring advanced features like workflow automation, analytics, and integrations, open-source solutions provide unmatched flexibility without heavy costs.
By exploring GitHub, businesses can access some of the most innovative CRM solutions built by global communities of developers. These tools are constantly updated, often come with a wide range of plugins and APIs, and allow you to tailor workflows to your unique processes.
In this blog, we highlight the Top 15 Open Source CRM Software on GitHub that can help you manage sales, streamline marketing, enhance customer support, and drive business growth. From popular names like SuiteCRM, Vtiger, and EspoCRM to specialized platforms like CiviCRM for nonprofits and Corteza CRM for privacy-focused businesses, this curated list covers reliable tools for businesses of all sizes.
If you’re looking to boost your business with CRM software that is customizable, cost-effective, and backed by active open-source communities, these top picks from GitHub are worth exploring.
📝 What is Open Source CRM Software?
Open source CRM software is a customer relationship management solution where the source code is publicly available. This means businesses can download, use, and customize the platform according to their specific needs without paying high licensing fees.
Unlike proprietary CRM tools that limit flexibility and often lock businesses into subscriptions, open source CRM allows for greater control, scalability, and innovation. Organizations can modify workflows, add integrations, and ensure that the software aligns perfectly with their processes.
Key capabilities often include:
- Lead and contact management
- Sales pipeline tracking
- Workflow automation and task management
- Customer support and ticketing
- Marketing campaigns and analytics
- Integration with ERP, email, VoIP, and other tools
🏆 Why Choose Open Source CRM Software from GitHub?
1. Cost-Effectiveness
Open source CRM solutions are usually free to download and use, with costs limited to hosting, support, and custom development. This makes them a practical choice for startups and growing businesses.
2. Flexibility and Customization
Because the source code is open, companies can adapt the CRM to their business model. Whether you need to modify sales pipelines, integrate new APIs, or automate unique workflows, open source tools provide the flexibility to do so.
3. Community-Driven Development
CRMs available on GitHub are supported by large communities of developers. These communities constantly improve features, fix bugs, and offer regular updates, ensuring the software remains reliable and up to date.
4. No Vendor Lock-In
With open source CRM, businesses are not dependent on a single vendor for updates, support, or licensing renewals. This independence reduces long-term risks and allows for more competitive pricing in customization and maintenance.
5. Scalability
Open source CRM platforms can scale easily as your customer base and team size grow. Businesses can add modules, increase performance capacity, and integrate new tools without replacing the entire system.
6. Transparency and Security
Since the source code is publicly accessible, businesses can audit the software for security and compliance. This transparency makes it easier to trust the platform for handling sensitive customer data.
🔍 Which Type of Open Source CRM Should You Choose?
1. For Startups and Small Businesses
Choose lightweight CRM platforms that are easy to install, simple to use, and require minimal server resources. These solutions help in managing basic sales and customer relationships without overwhelming teams with advanced enterprise features.
2. For Sales-Driven Teams
Select CRM solutions that prioritize pipeline management, workflow automation, and marketing campaigns. Such platforms improve lead scoring, streamline follow-ups, and enhance sales performance.
3. For eCommerce or B2B Businesses
Opt for CRMs that specialize in multi-channel tracking and advanced analytics. These tools help businesses capture data from different channels—like online stores, social media, and email—to create unified customer profiles.
4. For Nonprofits and NGOs
Some open source CRMs are designed specifically for fundraising, donor management, and event tracking. They often integrate with content management systems (CMS) like WordPress or Drupal for seamless campaign management.
5. For Enterprises and Large Organizations
Choose enterprise-grade CRM solutions with multi-tenant architecture, robust security, and integration with ERP systems. These platforms can handle high volumes of data and complex workflows across departments.
6. For Privacy-Focused Businesses
Consider open source CRMs that emphasize data security, compliance (such as GDPR), and modular customization. These platforms are especially valuable for organizations in regulated industries.
📈 Additional Factors to Consider
When selecting an open source CRM from GitHub, evaluate:
- Ease of installation and setup for your tech team
- Available extensions and plugins for scaling functionality
- Integration support for email, VoIP, marketing tools, or ERP systems
- Active community and update frequency for ongoing improvements
- User interface and training requirements to ensure adoption by your team
Quick Comparison: Top 15 Open Source CRM Software on GitHub
| # | CRM Software | GitHub Link | Best For | Key Features |
|---|---|---|---|---|
| 1 | SuiteCRM | SuiteCRM on GitHub | SMBs & Enterprises | Sales & marketing automation, workflows, reporting, API integrations |
| 2 | EspoCRM | EspoCRM on GitHub | Startups & SMBs | User-friendly UI, workflow automation, REST API, customizable modules |
| 3 | YetiForce CRM | YetiForce on GitHub | Growing Businesses | 100+ modules, advanced security, VoIP & email integration, GDPR compliance |
| 4 | OroCRM | OroCRM on GitHub | eCommerce & B2B | Multi-channel tracking, workflow engine, segmentation, Symfony-based |
| 5 | Vtiger CRM | Vtiger on GitHub | Sales & Support Teams | Lead management, email campaigns, inventory, helpdesk, integrations |
| 6 | Dolibarr ERP & CRM | Dolibarr on GitHub | Startups & Small Enterprises | Unified ERP + CRM, invoicing, project management, marketplace add-ons |
| 7 | CiviCRM | CiviCRM on GitHub | Nonprofits & NGOs | Donor & member management, event campaigns, CMS integration, analytics |
| 8 | X2CRM | X2CRM on GitHub | Marketing & Sales Teams | Lead scoring, social CRM, workflow automation, advanced analytics |
| 9 | Axelor Open Suite (CRM Module) | Axelor on GitHub | Medium & Large Businesses | CRM + ERP + BPM, automation workflows, modern UI, integration-ready |
| 10 | Zurmo CRM | Zurmo on GitHub | SMBs & Teams Seeking Engagement | Gamification, sales automation, marketing campaigns, API-driven |
| 11 | EspoPortal CRM (Extensions) | EspoPortal on GitHub | Service-Oriented Businesses | Customer self-service portals, knowledge base, notifications, role-based access |
| 12 | Apache OFBiz (CRM Component) | Apache OFBiz on GitHub | Large Enterprises | CRM + ERP, scalable architecture, order & inventory management, robust APIs |
| 13 | Flectra CRM | Flectra on GitHub | SMBs & Startups | Drag-and-drop sales pipeline, project & HR tools, cost-effective Odoo alternative |
| 14 | OpenCRX | OpenCRX on GitHub | Enterprises & B2B Firms | Enterprise-grade CRM, strong security, multi-tenant support, email/calendar integration |
| 15 | Crust CRM (Corteza CRM) | Corteza CRM on GitHub | Privacy-Focused Businesses | GDPR-compliant, modular framework, workflow automation, API-ready platform |
Here is the detailed description about Top 15 Open Source CRM Software on GitHub in 2025
1. SuiteCRM
Overview:
SuiteCRM is one of the most popular open-source CRM platforms built as an alternative to proprietary solutions like Salesforce. It provides all the core CRM functionalities, including sales automation, marketing campaigns, workflow management, and advanced reporting.
Key Features:
- Sales, marketing, and support automation.
- Customizable modules and workflows.
- Advanced reporting and dashboard creation.
- Email integration with tools like Outlook and Gmail.
- REST API for easy integration with other applications.
- Scalable for small businesses and enterprises.
Why Choose SuiteCRM:
SuiteCRM is known for its robust ecosystem, active community support, and flexibility to adapt to various industries. It’s cost-effective for companies seeking enterprise-grade CRM without license fees.
2. EspoCRM
Overview:
EspoCRM is a lightweight yet powerful open-source CRM solution. It focuses on providing a user-friendly interface and supports core business functions like sales, marketing, customer support, and project management.
Key Features:
- Web-based CRM with mobile-friendly UI.
- Supports lead management, opportunities, accounts, and contacts.
- Workflow automation and business process management.
- Integration with popular email clients and telephony systems.
- REST API and extension marketplace for custom modules.
- High performance with low server resource requirements.
Why Choose EspoCRM:
EspoCRM is ideal for startups and SMBs that need a simple but effective CRM solution with good customization capabilities. Its clean interface makes it easy for teams to adopt.
3. YetiForce CRM
Overview:
YetiForce CRM is a feature-rich open-source CRM software inspired by Vtiger CRM. It’s known for its flexibility and built-in modules designed for a wide range of industries.
Key Features:
- 100+ built-in modules for sales, marketing, support, and inventory.
- Calendar and task management for team collaboration.
- Integration with telephony, email, and VoIP systems.
- Advanced security with role-based access control.
- GDPR compliance for businesses handling European customers.
- Regular updates and active GitHub community.
Why Choose YetiForce CRM:
YetiForce is suitable for businesses looking for an all-in-one CRM platform that can be customized extensively and scaled for enterprise-level operations.
4. OroCRM
Overview:
OroCRM is a modern, flexible CRM platform designed for businesses that focus heavily on eCommerce and B2B sales. It provides strong reporting and segmentation features and integrates seamlessly with platforms like Magento.
Key Features:
- Centralized customer data management.
- Powerful workflow engine for custom business processes.
- Advanced segmentation for marketing campaigns.
- Multi-channel customer tracking.
- API-driven for easy integration with ERP and eCommerce systems.
- Built on Symfony PHP framework, making it developer-friendly.
Why Choose OroCRM:
OroCRM is perfect for online retailers and B2B companies that need to unify data from different sales channels and improve their customer engagement strategies.
You can also read: 17 Best Open Source Applications to Explore in 2025
5. Vtiger CRM
Overview:
Vtiger CRM is one of the most established names in open-source CRM. It’s widely used by small and medium-sized businesses for managing sales pipelines, customer support, and marketing campaigns.
Key Features:
- Comprehensive sales automation and lead tracking.
- Built-in marketing tools like email campaigns and web forms.
- Helpdesk modules for customer support and ticketing.
- Inventory management, billing, and project tracking.
- Integration with telephony systems and third-party apps.
- Rich extensions and plugins for customization.
Why Choose Vtiger CRM:
Vtiger is an all-in-one solution that combines CRM, marketing, and support functions in one platform. It’s a good choice for businesses that want a mature CRM with plenty of community-driven resources.
6. Dolibarr ERP & CRM
Overview:
Dolibarr is a popular open-source ERP and CRM suite, providing not just customer relationship management but also accounting, HR, and project management modules. It’s ideal for small and growing businesses that need a unified platform.
Key Features:
- CRM functions for contact, lead, and opportunity management.
- Built-in ERP modules like invoicing, expenses, and inventory.
- Project and task management for collaboration.
- REST API for integration with other applications.
- Add-on marketplace for extensions.
- Lightweight and easy to install on most hosting environments.
Why Choose Dolibarr:
Dolibarr is perfect for startups and small businesses that need both CRM and ERP functionalities in a single platform without heavy technical requirements.
7. CiviCRM
Overview:
CiviCRM is a specialized open-source CRM built for nonprofits, NGOs, and advocacy groups. It helps organizations manage donors, events, campaigns, and memberships effectively.
Key Features:
- Contact and donor relationship management.
- Membership and subscription management tools.
- Event registration and fundraising campaign support.
- Integration with popular CMS platforms like WordPress, Drupal, and Joomla.
- Powerful reporting and analytics for donations and campaigns.
- Active global community support.
Why Choose CiviCRM:
CiviCRM is best for nonprofit organizations that need a cost-effective CRM tailored to handle donors, memberships, and fundraising activities.
8. X2CRM
Overview:
X2CRM is an open-source CRM designed with a strong focus on marketing automation and workflow management. It’s a great fit for businesses that prioritize lead nurturing and sales performance tracking.
Key Features:
- Lead scoring, marketing automation, and sales funnel tracking.
- Drag-and-drop workflow editor for process automation.
- Social CRM features to engage customers on social channels.
- Advanced reporting and analytics dashboard.
- REST API for third-party integrations.
- Scalable architecture for businesses of different sizes.
Why Choose X2CRM:
X2CRM is perfect for sales-driven teams and marketers who want advanced automation tools in a flexible open-source platform.
9. Axelor Open Suite (CRM Module)
Overview:
Axelor Open Suite is a modern open-source ERP and CRM platform that combines business process management (BPM) with customer relationship management. It’s built using a modular architecture, making it flexible and scalable for various industries.
Key Features:
- CRM module for managing leads, contacts, and opportunities.
- Built-in BPM engine for automating complex business workflows.
- Sales and marketing campaign management.
- Integration with ERP functions like inventory, accounting, and HR.
- REST API and webhooks for seamless integration.
- Modern, intuitive user interface for better team adoption.
Why Choose Axelor:
Axelor is great for businesses that need a unified CRM and ERP solution with a strong focus on automation and scalability.
10. Zurmo CRM
Overview:
Zurmo CRM is an open-source CRM software that stands out for its gamification features. It helps organizations improve CRM adoption by motivating teams through achievements, rewards, and progress tracking.
Key Features:
- Contact, lead, and opportunity management.
- Gamification to encourage user participation and engagement.
- Sales force automation and marketing campaign management.
- REST API for third-party integrations.
- Mobile-friendly interface for sales teams on the go.
- Flexible customization for workflows and reporting.
Why Choose Zurmo:
Zurmo is ideal for businesses looking to boost team engagement and CRM usage while keeping the platform simple and functional.
11. EspoPortal CRM (EspoCRM Extensions)
Overview:
While EspoCRM was mentioned earlier, its EspoPortal CRM extensions deserve separate attention for businesses wanting to build customer self-service portals. These extensions allow organizations to extend EspoCRM’s functionality for external stakeholders.
Key Features:
- Customer self-service portals for ticket tracking and support.
- Integrated knowledge base for improved customer service.
- API-driven design for seamless integration with websites or apps.
- Role-based access control for portal users.
- Supports workflows and automated notifications.
- Ideal for SaaS providers and service-oriented companies.
Why Choose EspoPortal CRM:
EspoPortal CRM is a perfect addition for businesses that want to empower their customers and reduce support workload by offering online self-service features.
12. Apache OFBiz (CRM Component)
Overview:
Apache OFBiz is a robust open-source ERP framework maintained by the Apache Software Foundation. It includes a CRM component that helps businesses manage customer data and interactions within a comprehensive enterprise system.
Key Features:
- CRM functionalities like lead and contact management.
- Integrated ERP modules for order, inventory, and financial management.
- Scalable architecture suitable for large enterprises.
- Flexible framework for building custom business applications.
- REST API and web services support.
- Backed by Apache’s long-standing open-source ecosystem.
Why Choose Apache OFBiz:
OFBiz is best suited for enterprises seeking a full-scale open-source ERP with integrated CRM capabilities, along with a reliable and active development community.
13. Flectra CRM
Overview:
Flectra is a modern open-source business management platform that includes a powerful CRM module. It’s often compared to Odoo for its similar interface and capabilities but is entirely open-source and community-friendly.
Key Features:
- CRM for managing leads, opportunities, and customer interactions.
- Integrated project management, invoicing, and HR tools.
- Drag-and-drop pipeline management for sales teams.
- REST API for integration with third-party apps.
- Mobile-friendly interface with real-time updates.
- Highly customizable for different industries.
Why Choose Flectra:
Flectra is ideal for SMBs and growing businesses looking for a cost-effective alternative to Odoo with both CRM and ERP functionalities in one platform.
14. OpenCRX
Overview:
OpenCRX is a powerful open-source CRM solution built for enterprise-grade scalability and multi-user collaboration. It focuses on delivering secure, high-performance customer data management.
Key Features:
- Comprehensive contact, lead, and opportunity tracking.
- Multi-tenant architecture for managing different teams or organizations.
- Integration with email, calendar, and document management systems.
- Support for role-based permissions and advanced security policies.
- Compatible with major databases like PostgreSQL and MySQL.
- Highly customizable with open APIs and extensions.
Why Choose OpenCRX:
OpenCRX is a great choice for large organizations or B2B businesses that need robust data security and scalable CRM capabilities.
15. Crust CRM (Now Corteza CRM)
Overview:
Crust CRM (Corteza CRM) is a next-generation open-source CRM built on the Corteza platform. It focuses on flexibility, data privacy, and seamless integration with other business applications.
Key Features:
- Modular CRM framework with drag-and-drop customization.
- Lead and contact management with advanced analytics.
- Integration with email marketing and cloud storage tools.
- Fully API-driven for third-party integrations.
- GDPR-compliant and secure data handling.
- Active open-source community with continuous updates.
Why Choose Crust CRM (Corteza):
Corteza CRM is perfect for businesses that want a modern, privacy-focused CRM platform with complete freedom to customize workflows and integrations.
Conclusion:
Selecting the right CRM is no longer just about tracking customer details—it’s about empowering your teams to work smarter, improve customer engagement, and achieve measurable results. The good news is that you don’t have to rely on expensive proprietary systems. With the wide variety of open source CRM software on GitHub, you can access enterprise-level features at no licensing cost, along with the freedom to adapt the software to your organization’s unique needs.
The Top 15 Open Source CRM Software on GitHub we’ve listed—ranging from feature-rich platforms like YetiForce CRM and Dolibarr to specialized solutions like CiviCRM and Corteza CRM—offer businesses of all sizes the opportunity to implement scalable, secure, and user-friendly CRM systems.
Before choosing one, assess your business requirements:
- Do you need strong marketing automation and workflow features?
- Are you a nonprofit looking to streamline fundraising and donor management?
- Do you want a CRM that also integrates ERP and project management tools?
Answering these questions will help you pick the right CRM from our curated list.
By leveraging open source CRM software on GitHub, you gain not just a powerful tool but also the support of active communities, frequent updates, and the ability to innovate without being locked into expensive vendor contracts.
Empower your team, enhance customer experiences, and drive sustainable growth—start exploring these open-source CRM platforms today to transform the way your business manages relationships and achieves success.
Frequently Asked Questions
Open source CRM software is a customer relationship management tool whose source code is publicly available, allowing businesses to customize and use it freely.
GitHub hosts reliable open source CRM projects maintained by active developer communities, offering flexibility, regular updates, and lower costs.
SuiteCRM, EspoCRM, and Flectra are among the best open source CRM tools for small businesses due to their simplicity, affordability, and easy customization.
Yes. Most open source CRM tools on GitHub follow strong security standards and receive frequent updates, but proper configuration and server security are essential.
Absolutely. Most open source CRMs like YetiForce, Dolibarr, and Corteza offer REST APIs and plugins for integration with ERP, marketing, email, and eCommerce tools.
