In my Telegram review, I focus on the reality behind the hype: Telegram is incredibly fast and feature-rich, but most chats are cloud chats where Telegram holds the keys. If you use Telegram, you need to treat Secret Chats as mandatory for sensitive conversations and use a VPN to reduce IP-based metadata exposure.
Pros
+Massive group support (up to 200,000 members) and channels for broadcasting
+Seamless multi-device syncing via the cloud
+Feature-rich platform with bots and large file sharing (up to 2 GB)
Cons
-No end-to-end encryption by default for standard chats (must use Secret Chats)
-Cloud storage means Telegram can technically access message content in cloud chats
-Collects more metadata (e.g., IP address, devices, username history) and retains IP data up to 12 months