When you visit some company you see the name that comes before https how Can I do It with letsencrypt?
No, you need extended validation for that, not just domain validation.
What do you mean extend validation?
Now the Question is how Can I get It?
Use your favourite search engine to find a CA that issues EV certificates. Let’s Encrypt only issues DV certificates, no OV or EV certificates.
also be reminded that EV certs, especially due to their high assurance, are pretty high in cost.