The main difference between WhatsApp and texting is that WhatsApp is an online, cross-platform messaging service, while texting is sent and received through a cellular network. Another key difference between these two is that WhatsApp messages are encrypted, meaning they are secure and private, while text messages are not encrypted. Text messages are limited to 160 characters, while WhatsApp messages can be up to 2,000 characters long. Finally, WhatsApp users can send messages, pictures, audio recordings, and videos, while text messages can only support plain text.