Better than WhatsApp: Try these Free Software Apps and Services — Free Software Foundation India
https://fsf.org.in/article/better-than-whatsapp/
You can find me as @jaywink:federator.dev on #Matrix 😊
@jaywink Email should probably be in the list of federated services there. It's been an "instant" messaging service for a while and has about 4 billion users.
