WeCom Open Platform (open.work.weixin.qq.com) is for developers and service providers in the WeCom ecosystem. It is positioned as an enterprise collaboration open platform similar to Slack and Microsoft Teams, providing capabilities such as application integration, contacts, messages, identity authentication, and callbacks.

The platform itself is a Tencent cloud service, not self-hostable software. Enterprises only need to prepare resources such as a callback server accessible from the public internet, a domain name, and certificates. Users in China should pay attention to WeChat/WeCom compatibility, ICP filing, and support from domestic cloud service providers.