'In conclusion, the company gave us the impression of being a....'
'to us, the company seemed like a...'
'the company reminded as of a...'
are perhaps a little more fluid. 'Our very impression' isn't really said, and the whole construction with 'very' giving emphasis to a pronoun is also a little outdated.
(If you were willing to change the construction a little) I think it would also work for you to say something along the lines of: The company seemed to us more like a large family, in which all the members work together to get things done.