The primary difference between WeChat and WeCom lies in their intended use:

1. WeChat: WeChat is a multipurpose social media and messaging app widely used for personal communication, social networking, posting articles, running ads, and more.
2. WeCom: WeCom, also known as WeChat Work, is specifically designed for business communication needs. It serves as a corporate communication and office tool, providing features tailored to professional use, such as verified employee accounts for client interactions.

These distinctions make WeCom suitable for internal team collaboration, customer engagement, and business-related communications, while WeChat remains more versatile for personal and public interactions.