Unlike a charitable foundation, a private foundation does not generally solicit funds from the public. And a private foundation does not have the legal requirements and reporting responsibilities of a registered, non-profit or charitable foundation. Not all foundations engage in philanthropy: some private foundations are used for estate planning purposes.
charitable foundation never solicits money from the public.
"Unlike a charitable foundation, a private foundation does not generally solicit funds from the public." Hence charitable foundations do solicit so saying they never do would be definitely incorrect.