The top players and teams change a lot in CS:GO.
Upon writing, the top team is Team Liquid, who recently claimed top spot from Astralis. However, this is partly down to the lack of appearances in tournaments from the Danish team Astralis. Team Liquid are the best team in North America, having been finalists at every tournament that they attended last year, bar one.
Other tom teams include the Finland based ENCE, French team Vitality and new Brazillian team FURIA. Popular eSports team FaZe also compete with the top teams, being good value to bet on.