If you have already joined an Alliance, tap the bulleted list icon on the top of the Alliance menu by your Alliance’s name to access the search tool.
You will need to enter an Alliance Name or Tag to start searching for other Alliances. You will have the option to filter the results by privacy type.
If you are not part of an Alliance, you will see recommended Alliances first in the search results. These are all Open Alliances based on your strength, your country, and your language.