Messenger: because everybody has Facebook
Facebook’s official instant messaging app has recently been made over to deliver a faster, cleaner service and interface. It’s much like WhatsApp (as are most of the apps on this list), but Messenger instantly connects to all of your Facebook contacts, making it one of the most convenient messaging apps, if nothing else.
A recent update is that you can also message non-Facebook friends by using their phone number. Messenger allows you to access all of your Facebook messages without using the main app or website. It also has stickers and emojis, groups, voice recordings, location data, free calls, photo sharing and more.Messenger
Skype: for video calls
The granddaddy of video calls, Skype has been around for forever and is still kicking strong. Skype is primarily used for calls, but the IM component is just as useful. In fact, we use it as our primary communication tool here at AndroidPIT.
Skype requires Skype IDs, so you’ll only be able to add friends if you know their Skype contact name. But once you do, you can send instant messages anytime you want, for free, as well as make video calls. You can also add Skype credit and make cheap international calls to landlines and mobile phones.
The chat section offers group chat, media sharing, emoji and more. Plus you can have one account on several devices (something that WhatsApp doesn’t allow).Skype - free IM & video calls
Telegram: to keep the Russians out
Speed and security are the name of the game for Telegram. The app provides encrypted cross-platform messaging and it's completely free.
Founder Nikolai Durov stated that he set out to design a messenger that could not be accessed by Russian security agencies. When he offered a prize of US$200,000 to anyone who could crack the app's encryption protocol, no one managed it.
If you want a fast, free and secure messenger, Telegram comes highly recommended.Telegram
Dasher: for exclusive features
Dasher is making an effort to spice up the messenger market by employing some pretty cool and unusual features. It allows you to share GIFs and play YouTube videos directly in the chat window and there are rich URL previews: features that WhatsApp is only just starting to catch up with.
One of Dasher's most unusual additions is that of being able to share money with your friends using Venmo, something that no other messenger provides – useful when you're lying in bed remembering how your friend bundled you into a taxi last night.Dasher Messenger
MySMS: for SMS-IM bonding
Making a big splash upon release, MySMS aims to merge the worlds of SMS and instant messaging into one cohesive experience. It offers great cross-compatibility, working over Android, Mac, Windows and any web browser.
It supports group messaging and MMS, message scheduling, message export and backup, and connects with services such as Evernote, Dropbox and Google Drive. Many of the advanced features require a premium membership, but at just US$9.99 per year, it's hardly going to break the bank.
Tango: for networking
It takes two to Tango, but there are plenty more than that using the service. Tango does much the same as the rest: instant messaging, media sharing, stickers, group chat, video calling, group chat, etc, but it also has a ton of extras. Tango recently went through a complete overhaul and now hosts a news feed and even dedicated news channels for you to follow.
Tango will automatically find your friends based on your contact list, but they must be using the service to show up (or you can invite them). Additionally, Tango can be used to place calls, find like-minded friends or people in the vicinity using the service, which adds a bit more social networking to the mix than some other providers. The mid-call mini-games also help Tango stand out from the rest.Tango - Free Video Call & Chat
Hangouts: because it's Google
Google set up Hangouts as the standard (but interchangeable) messaging app in Android 4.4 KitKat, and thanks to this it picked up a lot more users. Hangouts is a combined SMS and IM app, that separates the two types of messages, but can be used to automatically place voice calls and video calls from your phone via Hangouts rather than traditional carriers.
Because it handles both SMS and IM, it cuts down on the number of apps you need to be working with, and its video calling quality is arguably better than Skype's. In addition, Hangouts integrates with Google+ in much the same way that Facebook Messenger interacts with Facebook, meaning contacts added via the social network can be called or messaged in the separate app. Be careful who you connect with if you're a particularly private person.Hangouts
Viber: for sticker enthusiasts
Viber is really pushing the sticker market, where you can get tons of free and paid sticker packs, but the core business of Viber is instant messages. You can also send recorded voice messages like WhatsApp (but not video calls like Skype) and you now have the option to call any phone number anywhere with Viber Out – much like adding Skype credit to call people who aren't on the service. Check out my tips and tricks for Viber article for more info.Viber
Line: if you want the younger, cooler Skype
Line is becoming more and more popular, and for good reason. With the recently added video calling functionality, it is now as fully featured as Skype, but has a younger, sexier feel to it than the tried and true Skype. It’s jam packed full of stickers and other fun stuff, and is immensely popular throughout large parts of Asia. But it’s also feature-filled with group chats, multi-platform capabilities (phone, tablet, PC), timeline, recorded voice messages, media sharing and much, much more, including official account messages from celebrities you like. Line is kind of like Twitter, Facebook and Skype all rolled into one.LINE: Free Calls & Messages
BBM: for the important
After a substantial waiting period, BlackBerry's messaging service finally made it to the Android platform last year. BBM is not as Androidy as the rest of the apps on this list, but it does offer some very cool features including: always-on service (you don’t need to open the app to use it), timed and retractable messages, two-way opt-in (nobody can message you until you specifically allow them), delivery reporting, groups, emoticons, broadcast messages and more. The ability to choose who can message you, rather than it being available to anybody with your number, makes this an attractive messaging option.BBM
Razer Comms: for gamers
Though Razer Comms is a fantastic instant messenger in its own right, it's first and foremost known for its popularity in the gaming community. With an accompanying PC version too, Razer Comms allows to you to group conversations, free VoIP chat, and it makes it quick and easy to connect with other gamers around the world. Think of it as Xfire for the smartphone era.Razer Comms - Gaming Messenger
Kik: for fun
"185 million people love Kik!" Says its Play Store description, proving there is more to messaging than just WhatsApp. Kik is a little more playful than the likes of WhatsApp, with more color and sticker options. Kik also houses its own built-in browser, to make video and image sharing between friends simple. It's a fast growing and friendly messenger with users from all over the planet. Give it a try.Kik
WhatsApp: because everybody has it
It's not all about WhatsApp... but WhatsApp sure is a big part of it. While it doesn’t have the same feature-rich content as many of the other apps on this list, WhatsApp can’t be beaten for simplicity, reliability, and the sheer number of contacts using it. Chances are, if you know someone with a smartphone, they’ve got WhatsApp.
WhatsApp uses your existing contacts’ phone numbers, so you don’t need to add contacts manually. You can send written messages, stickers, emojis and media, as well as broadcast and group messages.
WhatsApp also allows you to make free calls to your contacts and now you can make Google Drive backups of your chats, too.WhatsApp Messenger
What would you say is the best instant messenger apps for Android? Let us know in the comments.