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Discord is a free VoIP app that combines easy to configure chat UI with video and voice chat. Released in 2015, Discord quickly became the most popular VoIP app reporting over 250 million overall users (and over 14 million concurrent), Discord is great for coordinating teams and communities.

Microsoft Teams is a go-to messaging solutions for many companies. Gained exceptional popularity in 2020 due to its seemless integration with other Microsoft's products

Pushbullet is an app available for iOS, Firefox, Safari, Opera, Chrome and Android that connects your mobile device with your computer. This way, whenever you get text messages you can receive on any of the connected devices. This works for SMS as well as the phone notifications.

Pushover is an easy-to-implement push notification platform that can be integrated effortlessly into a wide range of web applications. You send out server/app/website monitoring related notifications to any iOS, Android or desktop device. Additionally Pushover provides developers with a powerful API that uses HTTP libraries available for most programming languages.

Slack is a chat platform designed for companies or teams. Thanks to its "workspaces" feature you can easily organize your day-to-day communication by creating various channels. Due to its powerful API, Slack allows for integration with a wide range of apps - including Buddy

SMS is a text messaging service developed in 1984 by team of GSM developers Friedhelm Hillebrand and Bernard Ghillebaert. Originally designed as part of GSM network is now available for networks liek 3-4G, H+ and more. Despite the growing market for internet-based messaging apps, SMS market is still a growing one reaching estimated worth of over $100 billion in 2014.

Telegram is one of the most popular online messaging apps. Unlike its competitors like WhatsApp, you can use Telegram across several platforms at the same time. Also, thanks to its powerful API, Telegram can be integrated into a wide range of apps and services like Buddy