Browns (Cherry MX is the brand you might have heard referenced, but other switch manufacturers tend to align their colour coding for analogous offerings) are noticeably quieter but they're not going to sound like a mushy non-mechanical switch. Also, they're not meant to be bottomed out but many typists do bottom them out frequently, which makes them louder. Still I find they are a lot more forgiving to your coworkers than a clicky switch.

Part of me wants to say "that's the company's problem to fix", if the working arrangement is such that keystrokes can negatively impact your coworkers. Things like white noise generators and walls go a long way to dampening that.