Here we have listed top open source CRM in the industry

SUITECRM

SuiteCRM is an open-source alternative to SugarCRM and is actually based on Sugar’s open-source version, SugarCRM Community Edition is l no longer supported by SugarCRM. It’s based on Open Source Sugar, but uses Open Source add-ons to make it close to, if not better than, the ‘Pay’ Sugar.”

according to Wikipedia, SuiteCRM is a software fork of the popular customer relationship management (CRM) system from SugarCRM. It became popular when SugarCRM decided to stop the development of its open-source version. It is a free and open-source alternative application based on the last open-source SugarCRM release and contains many additional enhancements and new modules.

SuiteCRM won the BOSSIE Award 2015 and BOSSIE Award 2016 for the world's best Open Source CRM. Infoworld, the curators of the BOSSIE awards stated that "In little more than a year, SuiteCRM has inspired the community and emerged as a new leader in open source CRM." The award had been won by SugarCRM for the previous 8 years.

SuiteCRM comprises the last release of the SugarCRM Community Edition, plus the following additional modules:

• Products
• Quotes
• Contracts
• Invoices
• PDF Templates
• Workflow
• Reporting
• Search
• Events
• Google Maps
• Teams Security
• Portal
• Responsive Theme
• Outlook plugin

In addition to the new modules, extensive bug fixes and many enhancements to the core functionality have been made. There have been over thirty updates since the original project was released. A three-month release cycle is maintained with bug fix and security releases being made available between major releases

Compatibility:

PHP/MySQL-based shared host will work well to get you started on SuiteCRM.

Company's business model :

The company does not offer SaaS / Hosted software model and committed to earning business majorly from allied services like setting up hosting for SuiteCRM, Premium Support, Migration, and other services. The company actively supports the SuiteCRM software as well as it does support developing plugins and providing support services also company offers paid support services on an hourly basis as well as on yearly basis.

https://suitecrm.com/

ICTCRM

ICTCRM has been developed using open source SuiteCRM software https://suitecrm.com/ and open source communications framework ICTCore http://www.ictcore.org and we have enhanced its functionality by adding computer telephony integration (CTI ) features and functionality.

ICTCRM is a modern CRM software integrated with CTI to manage your organization's daily business and communications needs, It is suitable for small, medium, and large companies. You can manage your telemarketing campaigns either through SMS, Voice, Email, or Fax.

ICTCRM has been promoted by ICT Innovations http://www.ictinnovations.com, It is a customized version of renowned open-source CRM SuiteCRM https://suitecrm.com/ also integrated with open source unified communications framework ICTCore http://www.ictcore.org. we have enhanced its functionality by adding computer telephony integration (CTI ) functionality by adding both personal as well as mass communications capability either through SMS, Voice, Email or Fax based technologies by integrating this modern CRM and ERP solution with unified communications platform ICTCore http://www.ictcore.org.

The source code of the project can be downloaded from Github https://github.com/ictinnovations/ictcrm and its business site is https://www.ictcrm.com

YETIFORCE CRM

YetiForce was built on the Vtiger foundation, but it has many changes that help to accomplish the complicated tasks in a simple way. Most of the functions have been automated to ensure that all of them work together seamlessly and form coherent integrity. the sales process has been refined and updated module by module

Compatibility:

It is available at GitHub also It is compatible with PHP

Company's business model :

The company does not offer SaaS / Hosted software however offers development and support services also company offer paid modules as an add-on.

OroCRM

OroCRM is an open-source Client Relationship Management (CRM) application that allows creating a 360° view of your customers across multiple channels, organize the sales pipeline, manage account and contact information, communicate with customers, run marketing campaigns, and track campaign performance.

OroTeam, the team behind OroCRM, strongly believes that no two businesses are alike and this is why OroCRM is a very flexible and highly customizable application that was adopted in eCommerce, Retail, Financial Services, and many other industries.

OroCRM is built in PHP on OroPlatform and Symfony full-stack web framework.

OroCRM source code available at GitHub https://github.com/oroinc/crm

FAT-FREE CRM

Fat-Free CRM is an open-source Ruby on Rails-based customer relationship management platform. Out of the box, it features group collaboration, campaign and lead management, contact lists, and opportunity tracking.

Compatibility:

It is available at GitHub also It requires

• Ruby 2.3+ (latest recommended )
• MySQL v4.1.1 or later (v5+ is recommended), SQLite v3.4 or later, or Postgres 8.4.8 or later.
• ImageMagick (optional, only needed if you would like to use avatars)

DaybydayCRM

DaybydayCRM a customer relationship management system (CRM) whose purpose is to help you keep track of your customers, tasks, appointments, etc. The CRM is offered as an open-source, self-hosted platform

Features

Tasks & leads management
Invoice management
Time registration
Register user absence and vacation
Client & users appointments
Role -> permissions management
Global search
Client overview
Upload documents, and keep track of client documents

The project source code available at https://github.com/Bottelet/DaybydayCRM

ESPO CRM

EspoCRM is a free, open-source customer relationship management (CRM) software available for download, however, access to EspoCRM in the cloud is a paid service. Currently, more than 20,000 companies in 163 different countries are using the CRM software, which offers 15 supported languages. Features include sales automation tools, marketing automation, telephony integration, and more. The real estate extension, which is included, is an ideal real estate agency to manage properties and automate sales and marketing tasks. Additional services include support, training, and integration with a user's existing website or software.

Compatibility:

It is available at GitHub also It is compatible with PHP 5.6 or above (with PDO, JSON, gd, OpenSSL, zip, IMAP, mbstring, curl extensions); MySQL 5.1 or above.

Company's business model :

The company offers both SaaS / Hosted software as well as open-source software installable at your premises. it offers both paid support and installation as well as free services. espocrm.com