WooHoo consults on workplace happiness with clients such as Hilton, IBM, Ikea and Shell.
She works with clients such as British Airways, Sainsbury's, McDonald's, Avis Budget Group, SSE and RBL.
Some of its purported clients, such as a major Western oil company, are conventional corporations.
It is not compatible with third-party apps or clients such as Hootsuite or Tweetdeck.
They started out with British clients, such as the manufacturers of Wedgwood china and Rolls-Royce.
It earns money through online advertisements and extra services it offers clients, such as website design.
Medco is a so-called pharmacy benefits manager, which helps clients such as health plans negotiate discounts from pharmaceutical companies.
Then he became a literary agent, with clients such as Raymond Chandler, J. P. Marquand and Ben Hecht.
Headcount has risen to 20 and he has attracted clients such as the BBC, NHS and Waitrose.
It was a successful company, with clients such as Facebook, and Schwartz's colleagues urged him to avoid the political fray.
It became famous on the back of celebrity clients such as Chris Evans, Guy Ritchie, Geri Halliwell and Uri Geller.
