I'm not a founder, but I am a builder and in the growth domain. So I can provide a different view for this.
1. Outbound in general is a hard space in 2026. Folks generally have a predisposition to auto-delete or be sensitive to 'wasting time' with cold outreach with the idea that they will most likely be sold to at some point.
2. Your best case scenario here is to offer free access to beta and then talk to every user you possibly can after that. Because at this point you have 1) ensured the person you are going to talk to has a use for your product and 2) offered them value before asking for something.
TL;DR
Offering value before asking for something is the key. This is true in almost every area.