Collects and sells data
Unable to monitor
Allows direct messaging between strangers
What Telegram says, "Pure instant messaging — simple, fast, secure, and synced across all your devices. Over 200 million active users in four years. Telegram is the fastest messaging app on the market, connecting people via a unique, distributed network of data centers around the globe."
What SGS says, "Texting or iMessaging should be the messaging apps on your phone."