Check out this great article on Telegram and Signal: the-crypto-keepers-levine
I understand that this may be a divisive topic but I have been following the investigative research by journalist and author Yasha Levine who wrote a excellent book called Surveillance Valley and has been looking into the ongoing of the Broadcasting Board of Governors which is a US government agency that overseas it’s soft power networks like Radio free Asia and Europe etc. What people may not know is that this agency also funds the privacy message app Signal through its Open Technology Fund (around 3 million dollars since 2013). Not sure what people think about this but its a big red flag. For example if it had happened to turn out perhaps that /e/ was being funded by some government agency you would be quick to question its true intentions especially since if said agency isn’t a some national science research agency like nasa but one set up to oversee US propaganda and influence citizens in nations outside it’s borders.
The developers of /e/ may want to reconsider the inclusion of signal as a default application, at least until it is open and clear about it’s funding sources and independence from US intelligence.
Edited: for clarity on a part mentioned below, which was supposed to be as a example