@emjonaitis Doubt these package can be used for entire dataset, but here are some beta regression packages that handle clustering and have some optimizations included (e.g. C++, parallelization). Not sure about the 0s and 1s though. Anyway, they might worth checking out. betaregscale, https://evandeilton.github.io/betaregscale/ cobin, https://github.com/changwoo-lee/cobin glmmTMB, https://cran.r-project.org/web/packages/glmmTMB/index.html GLMMadaptive, https://drizopoulos.github.io/GLMMadaptive/