There’s no mention of pricing. I know it’s in beta but products that don’t make it super easy to find pricing are an instant no for me. I’m not even downloading.
Finally, the web page mentions “ethically sourced contacts”. It sounds like your mail client is going to store all of my contacts on your server. Putting the word “ethically” in front of this does not make it better. Why do you need my contacts on your server? Do the messages pass through your server? There’s no technical reason for this, so it just seems like data harvesting.