Linking to their post to say it’s a little bit more complicated that “it isn’t secure” https://drewdevault.com/2018/08/08/Signal.html

Wait till you hear where the Tor money comes from. Funding is not a direct cause of issues.

Also it sadly hasn’t been maintained for years

And ? Obviously it’s not the for-profit structure which would benefit from donations. VC money is one way of financing things (which has the cash burn rate issue), public money and donations is another, why would changing from one model to another be something bad?

This post is by the Matrix foundation, not Element.

Unfortunately Silence has been unmaintained for years now, so I wouldn’t recommend it.