I spoke with this company at a career fair and the recruiter was in jeans and a tshirt. The two people who interviewed me were in jeans and a tshirt.
I looked online to get an idea of their culture. There are pictures of employees in the office in jeans and a tshirt.
There is another picture of the founders together in jeans and a collared shirt.
I am not wearing jeans. I know not to do that. But I also do not want to be in a suit and look like a narc and get judged on that like I cannot fit into their culture.
I would like to wear slacks and collared shirt, no tie. If I wear a tie I will wear a suit. Tie without a jacket just makes me feel like a dork.