Yes. Hopefully you already own these domain names before publishing them like this but here's my 2 cents:

Crowdsage.com is pretty solid out of those options. All things being equal a .com is going to give you the edge in terms of credibility and many would argue SEO.

it does give you some minor problems that as a stand alone domain it's not clear whether you mean crowds age or "crowd sage" but it's not a bad name.

A brand is what you make it. A great name doesn't guarantee success by any measure but it can help you create a stickier brand and make you easier to find.

I've developed a process for coming up with names that works pretty well. It's a multi-step brainstorming process and it takes time but I would be happy to share it with you or even brainstorm together over Clarity.

Good luck with this.

Adrian