No. Everyone can use Signal technology for free in their own products. They are not selling it to anyone. Yes, some time ago moxie helped to integrate their encryption algorithm in WhatsApp and that’s that. Very likely that he / the foundation got paid for that service, but it’s not like Signal is funded by selling their technology to anyone. And for sure it’s not like they can’t match WhatsApp features because then WhatsApp would go down the river and they run out of funding…
I don’t know what to say but stuff like this makes me kinda angry. You read about moxie helping implement their encryption in WhatsApp at one point, and then came up with this story that Signal is somehow mainly funded by meta and Microsoft and can’t compete with their products because it would put ms and meta out of business and endanger their own funding this way. Like, please don’t make up stories like that, OK? It’s not a nice thing to do.
If you are really interested here are some actual facts on the matter: