Open-source CRM systems must be implemented on-premise because they require coding by internal programmers to meet the company's needs.

Open-Source CRM

A customer relationship management system whose source code is available freely for use, modification, and distribution.

On-Premise

Refers to software and technology that is installed and runs on the premises of the person or organization using the software, rather than at a remote facility.

Internal Programmers

Developers or coders who are employed within an organization to create and maintain its computer software and systems.