Telegram is also completely free and doesn’t contain ads. There is support for stickers and GIFs, photo and video editing, and group chats for up to 200,000 people. You can store chat history in the cloud, share files with no limit on size, and chats are secured with 256-bit symmetric AES encryption, 2048-bit RSA encryption, and Diffie-Hellman secure key exchange. It works across devices on mobile and desktop platforms. Fitbit Versa 3īoasting millions of active users, Telegram bills itself as the fastest messaging app around.