I actually am in the market for a new chat app for a company I'm building and actively researching this right now. But until you have a /pricing page I'm not going to consider your app. I'm not interested in going through the rigmarole of contacting sales to find this out.
> Predictable pricing Fixed rate pricing means your team will always know what you’re spending on Cardinal. We’ve got plans for teams of all sizes and usage levels, from startup to enterprise
Given that you don't actually have _any_ pricing, predictable or otherwise, this is currently a total fabrication and should be removed from your website until you sort this out.