What is the difference between incoming webhook and slack chat.postMessage webAPI?
When should we use one over another? I have a slack app, I want to send messages to particular channel as a User. I found an option to post message as a User in chat.postMessage, can I achieve this by incoming webhook?
To your specific question. Its technically possible to send messages on behalf of a user with chat.postMessage by using a token from that user and setting as_user to true.
For example if you installed a Slack app the created app token will be linked to the installing user and you can use it send messages on behalf of the installing user.
