The 28 applications were received earlier this week, the regulator announced.
The KSA announced that each operator paid the €48,000 (£41,578/$57,787) set fee as part of their application.
“The purpose of the Act is to ‘channel’ as many players as possible from illegal to legal providers.” said Jansen in a statement.
“That is why I think that the number of applications guarantees a sufficiently attractive offer from 1 October with which the illegal offer can be largely suppressed. This also includes a task for the Ksa to tackle the remaining illegal providers.”
The license will allow operators to offer games of chance online from October 1, when the game of chance market opens.
Initially the act was to become law on July 1 2020, with the market opening six months later. But in November 2019 the start date was pushed back by 6 months to January 1 2021, with the market opening from July 1.
The final delay saw the act implemented on April 1 2021.
The Ksa has begun the application assessment process, with financial security, addiction prevention and player credit handling all being considered.