It’s perfectly correct to say that a company is 20 years old. I would only use “established” if you were also going to include other information.
My company was established 20 years ago by my father and my uncle.
October 21, 2019
0
0
0
Thanks for your quick check, Steve.
October 20, 2019
0
0
0
I’d say, “X was established 20 years ago.” Or perhaps better, “X was established in 1999.”
October 20, 2019
0
0
0
I'm assuming "X" as my company.
October 20, 2019
0
0
Still haven’t found your answers?
Write down your questions and let the native speakers help you!