In this article, we will compare these three instant messengers on a number of fronts: security, features, and ownership. What you will get and lose by choosing one of these messengers over the others, so you can make a well educated choice about which app you want to use.
Security is the most debatable and contentious topic among the three messaging services.
One thing that WhatsApp definitely has going for it is its end-to-end encryption. Plus, E2E on WhatsApp is available on every single mode of communication that the app enables. So all your messages, video calls, voice calls, photos, and anything else you share is end-to-end encrypted on WhatsApp.
What that means, is that you and the recipient are the only people who can read the messages you send to them. WhatsApp can’t decrypt the contents of your messages, calls, photos, etc, thus ensuring your security and privacy.
It is noteworthy that WhatsApp uses the E2E protocol developed by Open Whisper Systems, which is the name behind Signal messenger. That’s a good thing, because the Signal protocol is open source, widely peer-reviewed, and is generally considered one of the best protocols for implementing end-to-end encryption in messaging platforms.
But that’s on the back-end. What about security features on the user-facing side of WhatsApp. Well, WhatsApp offers a built-in app lock feature on both the Android and iOS apps, so you can lock your WhatsApp chats with biometrics. Moreover, you get support for two factor authentication (2FA) on the app, which is great for security as well.
Overall, WhatsApp does a pretty solid job of ensuring security for its users. That said, WhatsApp has suffered a couple of major privacy nightmares, especially the recent issue with group chats getting indexed on Google search. That issue has been fixed, however, it was not a good look for the messaging app.
As far as security is concerned, Telegram does offer some protections to its users. However, there are multiple pain points in the way Telegram encrypts your messages and other information. For one, while Telegram supports E2E encryption, it’s not enabled by default. The only way to use E2E encryption on Telegram is to use its secret chats feature.
Messages sent in a secret chat are E2E encrypted, which is nice, but regular chats are not. This means that the messages are encrypted on your device and then they are decrypted on Telegram’s server. Again, the messages are encrypted on the server and sent to the recipient’s device for final decryption. As you can see, in this process, Telegram has the encryption keys on the server-side and can, in theory, access your normal chats.
Telegram states that it manages its message storage and decryption keys in a way that one would require court orders from multiple legal systems around the world to be able to access any of your data. In fact, the company says that it has shared 0 bytes of data with third-parties and governments to this date.
Even if you’re using secret chats, Telegram uses its own proprietary encryption protocol, MTProto, to encrypt your messages. This may very well be fine, but since its a closed-source protocol, security researchers can’t verify it. As such, security researchers believe that using an open-source and widely trusted protocol such as the Signal protocol would have been better than using a proprietary closed-source encryption protocol in Telegram.
On the user-facing side of things, Telegram, like WhatsApp, also offers a built in app lock. However, end-to-end encryption is incredibly scarce in the app. Telegram groups are not encrypted because Secret Chats are only supported for single-user communication. Moreover, Telegram’s desktop client doesn’t support E2E encryption on any platform other than macOS.
Telegram’s security isn’t nearly as robust as WhatsApp’s or Signal Messenger’s.
Signal is by far the best when it comes to security, be it on the back-end or on the user-facing side of the service.
As mentioned above, Signal uses the open-source Signal Protocol to implement end-to-end encryption. And just like WhatsApp, the E2E encryption covers all forms of communication on Signal.
While WhatsApp encrypts messages and calls (and that’s enough for most users), Signal goes one step further and encrypts the metadata too. In order to protect user privacy from all corners, Signal devised a new way to communicate between the sender and the recipient and it’s called Sealed Sender. Basically, with Sealed Sender, no one will be able to know — not even Signal — who is messaging whom, which is amazing.
In addition, you have some incredible privacy features on Signal that is going to make your messaging experience even more private and secure. For instance, you can lock Signal with a passcode or biometrics. Then there is 2FA and an option to block screenshots within the app and the recent screen. And recently Signal added a new feature to blur faces automatically before sending images.
Not to mention, Signal by default encrypts all the local files with a 4-digit passcode. And if you want to create an encrypted local backup then you can do that as well. The app now also supports encrypted group calls.
For the most part, WhatsApp offers almost every feature you might need. You get support for group chats with up to 256 members. You can also broadcast messages to multiple contacts at the same time.
There’s also support for voice and video calls, both for individual users and groups. However, for group video calls, you are restricted to 8 users at any time.
Apart from that, WhatsApp offers a distinct feature that neither Telegram offers nor Signal. WhatsApp Status (also called Stories). Users love this feature as they are able to express their thoughts and feelings to their closed ones. In a way, this makes WhatsApp a social media platform, and not just a messaging service.
You can also share all sorts of files on WhatsApp, but there are file size limits to adhere to. For photos, videos, and audio files, the limit is 16 MB. However, documents can be up to 100 MB. You can also share live location with your contacts.
And since WhatsApp is meant for general users, it offers seamless backup and restore functionality through cloud services like Google Drive and iCloud. And the best part is that cloud backup is completely free. Not to mention, WhatsApp now also supports dark mode.
While WhatsApp offers most of the features you’d need, Telegram is basically overloaded with features. Similar to WhatsApp, you get the basics such as chats, group chats and channels. However, unlike WhatsApp’s 256 member limit, Telegram brings support for groups with up to 200,000 members.
The app also offers unique features such as a self-destructing messages feature which is great if you’re sending messages that you don’t want to remain on the recipient’s device for eternity. You also get support for editing sent messages, along with features like message scheduling, sharing uncompressed media, themes, and a lot more.
Telegram also offers incredible granular support over notifications you receive from the app. Plus, the size limit for sharing files on Telegram is a whopping 1.5 GB.
Up until a while ago, Telegram didn’t offer video calls. However, the app now supports both voice and video calls on Android and iOS devices, which is great because video call support was a big omission from the app.
While Signal beats Telegram and WhatsApp handily when it comes to security, it falls short on the features it offers.
You have secure messaging, voice, and video calls and all communications are end-to-end encrypted. Further, you can create groups, however, you don’t have the option to broadcast messages to multiple contacts at once. Plus, Signal has recently added support for group calling as well, something that was missing from the app for a long time.
You have features such as disappearing messages similar to self-destructing messages of Telegram, and the ability to send a one-time viewable image. Unlike WhatsApp, you don’t have to create a single-member group to send notes to yourself. On Signal, the feature is available natively and you can jot down your thoughts and ideas while messaging with your friends and family.
There are also emojis and some privacy stickers, but they are very limited in comparison to WhatsApp and Telegram. All in all, Signal has some of the best privacy features but might fall short for users who want endless customization options.
Ownership is important because it allows us to understand how companies are looking to monetize user data and lets you take an informed decision.
WhatsApp is owned by Facebook, and while for quite some time the company had managed to keep WhatsApp at least a little bit less intrusive into your personal life as compared to its eponymous social media platform, that’s changing now.
That’s not all, throughout WhatsApp’s lifetime under Facebook, there have been multiple allegations around the company breaking encryption and creating backdoors for government agencies.
There are also reports about ads on WhatsApp becoming a reality sooner rather than later. That gives Facebook even more incentive to monetize your WhatsApp data. Plus, since WhatsApp doesn’t encrypt metadata, Facebook can readily use that to track your behavior.
Facebook proofed previously their sheer incompetency (or unwillingness) to protect user data or give any sort of privacy protections. That’s something we have witnessed in a lot of detail since the Cambridge Analytica scandal.
Coming to Telegram, it was launched in 2013 by Nikolai Durov and his younger brother, Pavel Durov. Both are from Russia and are currently on a self-imposed exile. Pavel Durov was dismissed as CEO of a Russian social-media site after he refused to hand over data of Ukrainian protesters to Russia’s security agencies.
Apart from that, on many occasions, Pavel Durov has taken a principled position against censorship and government interference. Looking at the history that geared the development of Telegram, it does inspire trust. However, the closed-source encryption protocol and optional E2E support leave the room for more transparency and improvement.
Signal is owned by the nonprofit Signal Foundation which is run by cryptographer Moxie Marlinspike and Brian Acton. Moxie Marlinspike used to run Open Whisper Systems — the brainchild behind the Signal protocol. After he met Brian Acton in 2018, they formed a new alliance called Signal Foundation. It now wholly funds the development of Signal messenger. It’s noteworthy that Brian Acton was the co-founder of WhatsApp. However, he left the company 3 years after Facebook acquired it.
Now, he oversees the development of Signal along with Moxie Marlinspike. Many high-flying people including Edward Snowden, the American whistleblower; Jack Dorsey, the CEO of Twitter, and others endorse Signal. In addition, Signal has received top scores on the EFF’s Secure Messaging Scorecard making it the most secure messaging platform.
Signal is run by donations and grants.
On the other hand, Telegram messenger may not be the best in terms of security. However, it offers a lot of features that are enough to make any group admin drool. Plus you do get end-to-end encryption on Telegram, albeit restricted to secret chats.
To sum everything up, we suggest going with Telegram if you want more features than the average messenger. You can consider Signal if you’re looking for the essential messaging and calling features along with a high-standard of security. However, WhatsApp is looking more dicey than ever now with the new policy update.