The phrase "outside firm" refers to a company or business that is not part of or affiliated with the organization or group being discussed. It represents a company that is external or independent from the one being referred to. Full definition
Over the past year, we have been working with outside firms to analyze our old site and identify what the public needs when it comes to legal information on the Web. (slaw.ca)
Depending on company size and budget, there are plenty of outside firms skilled in creating personalized employee wellness programs. (inc.com)
For CEOs who come from outside the firm, the lifespan is even shorter, at 4.3 years versus an average 7.1 years for insiders. (canadianbusiness.com)