As Zello's functionality works more similarly to a walkie-talkie than other voice communication apps, emphasizing push-to-talk and call and response style communication in comparison to other voice chat client alternatives.
Though Zello is available on both the App Store and Google Play Store as well as Windows, other alternatives that support Mac, Linux, and the web might cater more to your needs depending on how much flexibility you require in your voice calling solution.
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- VoicePing is a Smartphone based app that gives you the function of PTT and more!
- Phoner provides business owner, sales people, lawyers, doctors, police officers and others with a second phone number to protect their identity and also gives the convenience of multiple phone numbers on one device.
- Ventrilo is the next evolutionary step of Voice over IP (VoIP) group communications software.
- Sesame is a messaging app that gives you a self-aware digital assistant to protect messages on your behalf: your own Personal Cognitive Messenger™.
- Turn your phone into a Walkie Talkie.Don't waste time on phone calls and voicemails.
- Open source messaging with a Wordpress-like plugin model.