Information on WhereTheyStand goes back as far as the 51st Parliament (2014-2017). Members of Parliament who were members of that or any subsequent parliamentary terms have profiles on WhereTheyStand.
WhereTheyStand is a personal side-project. I work on this site when I have free time, and I aim to keep it completly apolitical; editorial annotations to substantive content will be made rarely and with substantial disclosure.
Most of the funding for running WhereTheyStand comes from me. Of course, I've taken steps to keep costs down, including by utilising student discounts I have access to, and reserving cloud capacity ahead of time.
First, great Parliamentary monitoring sites overseas have given me a lot of ideas and inspiration for WhereTheyStand. TheyWorkForYou is a great site built by the mySociety charity in the UK. It sets a gold standard for sites like these and I can only hope to get there with WhereTheyStand one day.
Secondly, the data and information that is presented on WhereTheyStand comes from a wide range of organisations. They are not affiliated with WhereTheyStand, but public information they provide is used on WhereTheyStand: