In the US, sharing your salary is legally protected by the National Labor Relations Act — your employer can't prevent you from discussing your salary with others, including on social media and websites like Candor.
This protection applies to all "conditions of employement" — not just salary. You're entitled to publicly talk about all parts of your company's compensation, like PTO policies, benefits, equity compensation, etc.
When you post in Offer review, your username will appear as a randomly generated moniker, like "Agreeable Bear" or "Rambunctious Lion".