Here is a post from Reddit on cold emailing that is worth your time to read because it gives you a completely different voice and approach:
Here is his thesis:
So many cold approaches such because they go straight to persuasion.
The very first line starts with something like … “We’re the best people in the world at X… We’ve worked with X client and are ground-breaking X technology is a world’s first…”
YUCK! Of course, that gets deleted!
Your job is to sell the idea that a call or meeting with you is not a bad idea. Not to give every little detail – or to sell your entire offering in one go. Those steps come later…
It would be well worth your time to take a look.