Although Yahoo Messenger is dead, you’re not without modern options. In fact, there are dozens upon dozens of apps you can use instead. For example, Facebook Messenger, Skype, WhatsApp, and Signal are all fine options that are still in active development.
The replacement you choose should depend on what you want it to do. For example, there are lots of ways to call someone using just an app. Or maybe you’re wanting to make free video calls from your computer.
Most messaging apps actually include all those features; they let you make audio and video calls, send and receive texts, and share files. Some, like Facebook Messenger, are more closely related to Yahoo Messenger than others and can run from your phone/tablet, computer, and a web browser.
Yahoo introduced its own alternative to Yahoo Messenger in 2018, initially called Yahoo! Squirrel and then Yahoo Together. However, it was shut down, too, just a year later.