403b is a tax shelter, similar to a 401K... LLC is a corporate structure, more in line with C-corp. Maybe you meant 501c? There are a lot of articles out ther

403b is a tax shelter, similar to a 401K... LLC is a corporate structure, more in line with C-corp. Maybe you meant 501c? There are a lot of articles out there arguing that non-profits are pretty heavily restricted and to make strong change you need a for-profit company, probably related to the rise of "Impact Investing"