Slack
Add an icon next to your name
- Click your name at top-left.
- Click “Edit/set status”
- Click the emoji icon (left of the text input).
- Click the “Add Emoji” button.
- Upload your company logo (transparent PNG).
- Go back and set your status.
- Click the emoji icon.
- Click the last tab (Slack icon).
- Select your uploaded icon.
- Set “Clear After: Don’t Clear”.