Help What notification icon is this? Which app is it coming from?

[Oliver Twist]

https://imgur.com/YuijKhL

Does anyone know which app this notification icon is from?
I've tried searching for it but I can't seem to find an answer.
I'm not sure which exact model of phone this is but it's definitely an android phone.

 

[Brian706]

https://play.google.com/store/apps/details?id=com.whatsapp.w4b

 

[mikedt]

I thought WhatsApp, but I didn't recognise the B.

 

[Brian706]

I thought WhatsApp, but I didn't recognise the B.

I was able to find it on a reverse image search. I guess Whatsapp is big enough that it made it possible.