The most secure app I know is SimpleX. It is like Matrix but without an identifier, so you really interacting only with people you want. No one can reach you unless you gave him a link to connect to you.

Two different people cannot be ensured they are talking to the same person since there is no identifier they can compare to.

Delta Chat is awesome encrypted/secure messaging via imap and thus compatible with anyone who has an email address.

Conversations is an excellent XMPP client.

XMPP (with omemeo) is the classic (and also what FB messenger uses behind the scenes, without omemo), Matrix is the new kid on the block taking over. Both are decentralized sorta like the fediverse (but separate from said fediverse.)

Used to use Signal, but they're removing SMS support so everyone might as well switch to matrix. Wickr was bought by amazon (and they say they won't ruin it, riiiight), so that's out. Idk enough about briar or session, and telegram isn't as secure as people seem to think.

WhatsApp, because in my circle of friends and family there's no other way to use it, Matrix for groups and I have Signal installed for the future, who knows?

I use SMS and Matrix. I'd love to see something like Briar become more popular, or maybe XMPP make a resurgence as it's been a great federated chat protocol for a long while.

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Whatsapp is the norm here so I begrudgingly use that. Wish more people were on Signal, Matrix or Telegram.

Signal is my go to. Some of my friends refuse to download it, so I just text them. I'll use iMessage on iOS and Google Messages on Android. But if I can use Signal, I will

For your friends and family, Signal is probably the best. It's simple to use and set up, unlike SimpleX which some might have trouble with. For people who refuse to switch, iMessage.

I tried to migrate friends and family to Signal a couple of years back. Only managed with 3 people :/.

Unfortunately here (Italy), WhatsApp is too much widespread as reach out method now. Especially for businesses, from restaurants to, say, the family doctor.

Signal

I wish more people in my life would use Signal but I've given up on converting people from WhatsApp.

I pretty much just use everything. my messaging folder has Signal, Telegram, WhatsApp, Discord, SMS, etc lol.

Signal. I refuse to use whatsapp even though that's what most people I know use.

unfortunately it is whatsapp.. Had everyone move to signal, but it didn't last :(

Elements (Matrix) as much as much as possible. I bridge a lot services through it. Though Signal would be the second most.

I mainly use Signal, but sometimes have to fall back to SMS for people that aren't on Signal. I also have matrix accounts, but I never really use them since I don't have anyone among my friends and family that uses matrix.

I'm only Discord at this point. Over time I've just wanted to stay within a select few platforms for mental health and security. I would move to Matrix but most people I know are on Discord. But I still have an account there incase anyone wants to contact me.

Telegram almost exclusively, SMS for stubborn family, and Discord for stubborn communities that won't use something better.

Telegram almost exclusively. I love thé sheer number of features it offers and pay for Premium.