Each of come with their own apps *and* servers. By contrast, Delta Chat apps use the e-mail server of *your* choice and have provider-independent e2e-encryption through - implemented also by other e-mail apps.

To be clear, we welcome these other efforts and startups. They all contribute to a lively e-mail ecosystem. It didn't all end with GMail :) There is a wild variety and diversity around e-mail. But please press for interoperability to avoid lock-in schemes and sustain competition!

@delta I've tried Delta Chat with Vivaldi email and it works.
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