When you say that it's for small businesses and it's really efficient and light, I think people will identify with that. As long as features keep getting added to platforms, we will always need a super lightweight version. Again, I hope you get some paying users right away!
I think I'm just missing something and I see these as clashing messages that don't get fully explained: this platform will make you smile and you'll have fun using it, this platform is faster than other platforms, and it's built for small businesses. I'd ask you "How?" for all three of those.
Just some thoughts from a marketer who thinks about positioning and looks at lots of landing pages. I hope you ignore all advice, trust your gut, and have tons of success :)
Get people on board with free product than offer value add. A CRM requires trust.. so spend money on the brand or give a free tier and build trust.