v3.26.1
Form N-1A Cover
Aug. 06, 2026
Aug. 05, 2026
Prospectus [Line Items]    
Document Type   485BPOS
Amendment Flag   false
Registrant Name   Founder Funds Trust
Entity Central Index Key   0002077057
Entity Investment Company Type   N-1A
Document Period End Date   Aug. 05, 2026
Prospectus Date Aug. 06, 2026