domain MultiClouds.com & multipleclouds.com

The domain multipleclouds.com doesn't sound nice, nor punchy

The other being multiclouds.com...I consider it a pass, not bad. I suggest high hundreds, up to low thousands, to the right buyer only. Cloud computing overall is popular and on-demand. Multi Clouds...I don't consider it valueless. I believe there is use, again capturing the right buyer

Singular (MultiCloud) is worth something. Plural (MultiClouds) not so much.

The singular form is for sale on Afternic for just under $200k. That's likely excessive but best of luck to them if they can close it. The name is taken in 102 extensions.

The plural would carry a fraction of the value because the "s" contradicts with the prefix (multi). We don't say MultiMedias. We say MultiMedia. It's also only taken in 10 extensions showing that demand is very low.

You might be able to sell them in the low $$$ range.