XChat vs WhatsApp
The biggest shared trait between XChat and WhatsApp is that both default to end-to-end encrypted private messaging. That alone already separates them from WeChat and from Telegram's ordinary chat mode.
The real differences are identity, data incentives, and ecosystem maturity.
On identity, WhatsApp is built around phone numbers, so your account is closely tied to your real-world contact identity. XChat is built around an X account and does not require a phone number, which gives it a more pseudonymous feel. On the other hand, WhatsApp's contact model is effortless because it sits on top of your phone book. XChat depends more on your X network, which creates more friction if you are not already active on X.
On ads and data, WhatsApp belongs to Meta. Even though message content is encrypted, Meta can still collect metadata such as contact graphs and usage patterns that fit into its broader ad ecosystem. XChat currently has no equivalent ad business inside the product, so its incentive to collect metadata is arguably lower.
On ecosystem maturity, WhatsApp has more than two billion monthly active users, which means your friends and family are already there. XChat is a brand-new product building from zero, so in the short term it cannot compete on contact coverage.
Bottom line: XChat makes the more interesting privacy and identity-design argument, while WhatsApp still wins overwhelmingly on practical reach and day-to-day usability.