Just a few things:

- Signal is a lot less "polished" - FB has spent tons more resources on making a slick streamlined easy to use interface. Even though signal looks similar its missing all the little things.

- there is no easy to use backup. Whatsapp can backup to google drive or icloud and restore it on another phone. Signal you have to figure out how to deal with and transfer your backup file[1]. This isn't easy for regular folks, Signal needs to be able to connect to cloud storage (preferably of your choice).

- Whatsapp deals with and displays media better/faster

- calling works better. last time I checked whatsapp has easy group video and audio calls, Signal had neither.

There is actually lots more. I prefer the idea of using Signal over whatsapp, but I found it not close enough yet. Especially for non-techy ppl.

[1]: https://support.signal.org/hc/en-us/articles/360007059752-Ba...

It feels much worse to use than both Telegram or WhatsApp, both on Android and on OSX. I had installed it on iOS and Android and uninstalled within 10 minutes of trying to use it. That is how bad my user experience was.

My main complain is that whenever I start the desktop client after few days, it takes forever to load the old messages. I'm not sure, but I think it tries to download all messages and attachments before showing the UI, which can be potentially made faster by first trying to get the messages from person I'm trying to talk to and downloading attachments after text messages (Not sure about implication to security protocol here).

I had issues with lag and dropped packets when I was calling from Europe to South America with Signal about 6 months ago. I was really cheering for Signal (still am) and had suggested we try it, but it failed quite quickly. We moved the call back to WhatsApp within a minute or two, and had no problems whatsoever. So at least in my mind WhatsApp is still much more reliable.

It has almost none of my contacts on them. Pretty useless as a messenger as such.