The sensationalist tabloid article in the UK Daily Mail here admits Platte River Networks didn't begin working for Hillary until mid-2013, months after Hillary's tenure as Secretary of State had ended:
"Clinton's 'homebrew' computer system housed her emails while she was Secretary of State between 2009 and 2013. Platte River Networks provided its services in mid-2013 according to Barbara Wells, the company's lawyer."
That's why the employees interviewed for the article expressed disbelief that the small operation they knew and worked for long before 2013 could have had such an important client:
"Speaking to Daily Mail Online at her home in Castle Rock, Colorado, Tera [Dadiotis] said: 'I think it's really bizarre, I don't know how that relationship evolved. At the time I worked for them they wouldn't have been equipped to work for Hillary Clinton because I don't think they had the resources, they were based out of a loft, so [it was] not very high security, we didn't even have an alarm.' ... Tera thinks Platte River was an unsuitable choice for Clinton, she said: 'It's so weird, because it's just a small IT company. I know they've expanded quite a bit since I left but I do think it's strange, we only had the three owners and like eight employees. We didn't do any work in other states. No offense to them, but who are they?'"
The sneaky use of the word "homebrew" throughout the article is meant to unite in the reader's mind Hillary's server operation and the pre-Hillary bathroom of the fledgling company in the Denver apartment loft when there was no basis in fact for it. It's meant to make Hillary look bad, which is irresponsible, and unnecessary.
Hillary can do that all by herself.