| Logo |  |  |  |  |  |  |
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| Website | http://www.google.com/hangouts/ | http://line.me/ | http://skype.com/ | https://telegram.org/ | http://viber.com | http://www.whatsapp.com/ |
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| Worldwide User | | 400 millions | 560 millions | 50 millions | 600 millions | 800 millions |
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| Main Function | | | | | | to send a message to your contacts in without any charges
alternative way from contact people by using phone messaging |
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| Features | | | | | | |
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| IM Style Chat | Yes | Yes | Yes | Yes | Yes | Yes |
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| Group Chat | Yes | Yes | Yes max 300 users | Yes max 200 users | Yes max 15 users | Yes max 100 users |
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| Make video calls | Yes | Yes | Yes | No | Yes | No |
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| Group calls | Yes 10 users | | Yes max 9 users | No | No | No |
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| SMS Delivery | Yes on Android | Yes | Yes Paid feature ($ varies per country) | Yes | Yes | Yes |
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| MMS | | | No | | Yes | Yes |
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| Make phone calls | Yes | Yes PC, Android, iPhone, Windows phone, BlackBerry, Nokia Asha, Firefox OS | Yes | No | Yes | Yes |
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| Free phone calls | Yes between US, Canada, Puerto Rico | Yes | Yes 25 user limit | No | Yes | Yes |
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| Caller ID | No | Yes | Yes Paid feature | No | | No |
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| Payment methods | Yes free | | Yes Visa, Mastercard, Paypal, Ukash, Skrill, Maestro, Paybycash,sofortbanking, one-off bank transfer, Diners, paysafe card, JCB | Yes free | No Calling others through phone provider | Yes 0.99 USD/year |
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| Phone Contact Integration | Yes | Yes | Yes | Yes | Yes | Yes |
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| Google Contacts integration | Yes | | | | | |
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| FB Contact Integration | No | | Yes | No | No | No |
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| Custom Chat Area | Yes Background | Yes Background/ Font/ Sound | No | Yes Background/ Font/ Sound | Yes Background/ Font/ Sound | Yes Background/ Font/ Sound |
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| File transfer | | Yes | Yes | No | - only some file formats | No |
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| Photo based contact | Yes | Yes | Yes | No | No | Yes |
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| Sharing Features | | | | | | |
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| Share photo | Yes | Yes | Yes | Yes | Yes | Yes |
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| Share video | | Yes | Yes | Yes | Yes | Yes |
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| Share voice message | | Yes | No | No | No | Yes |
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| Registration | | | | | | |
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| Without phone number | Yes | Yes | Yes | No | Yes | No |
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| Email + Password | Yes | | Yes | No | No | No |
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| Facebook | No | Yes | No | No | | No |
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| Share account on multiple devices | Yes | | Yes | Yes | Yes | No |
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| Platforms | | | | | | |
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| Linux | Yes with web browser | No | - outdated version | | Yes Ubuntu, Fedora | No |
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| Android | Yes | Yes | Yes | Yes | Yes | Yes |
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| IOS | Yes | | Yes | Yes | Yes | Yes |
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| Mac OS | Yes with web browser | Yes | Yes | Yes | Yes | Yes |
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| Windows | Yes with web browser | | Yes | | Yes | Yes |
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| Blackberry OS | No | Yes | Yes | No | - text only | Yes |
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