Byju's leadership is in talks with the investors to try to convince them to reverse their decision, the three sources, who declined to be named as the talks are private, told Reuters.
Its rise was seen as a boost for India's startup scene as investors including General Atlantic made big bets on Byju's.
Two of the sources said the investors took the decision collectively to resign from the board as they were not getting answers from Byju's founder and senior management.
The departures mean Byju's board is now only made up of its founder and chief executive Byju Raveendran, his wife Divya Gokulnath, and his brother Riju Raveendran.
While the investors are holding talks with Byju's, it has not yet been decided whether or not their decision to resign would change, one of the sources added.
Persons:
Chan Zuckerberg, Byju's, Byju Raveendran, Divya Gokulnath, Riju Raveendran, Aditya Kalra, Alexander Smith
Organizations:
Peak XV Partners, Sequoia Capital, Deloitte, Reuters, Byju's, General Atlantic, Thomson
Locations:
DELHI, Sequoia Capital India, U.S