A few months ago a friend of mine got a job in a big company from the USA. She was suspected that because she was from Uruguay and a woman she was underpaid. After talking with some colleagues they created a spreadsheet where everyone from that company could share their salaries, sector, years of experience and gender. So everyone could see if they were being paid fairly.
When she told me that I thought it was a really great idea, everyone should have that in their company, salary transparency helps all of us, to get an idea of how much earn people in similar situations than me.
A few weeks ago, the hashtag #knowyourworth wen viral. So I finally decided to build a site where everyone could easily share their salaries in an anonymous way.
I know there are some similar tools over there but there are most of them for the USA or they just have data from big companies. Sometimes they are more complex than we would like.
I hope it helps.