The Tracxn Unicorn Club comprises of:
Unicorns: Companies with a valuation of $1B USD or more
Decacorns: Companies with a valuation of $10B USD or more
The term X-corn is used to refer to Unicorn Club & Soonicorn Club collectively.
Unicorn Club shows the entire list of companies which ever became Unicorns or Decacorns irrespective of their current company status.
Example :
Uber became a Unicorn in 2013 and a Decacorn in 2014.
It later went Public, so it is now neither a Unicorn nor a Decacorn.
Unicorn Club takes into consideration that Uber once became a Unicorn.
If you are looking for the list of companies which are currently Unicorns or Decacorns, you can get it using the Companies Covered view as shown here.