Fidelity and Vanguard charitable are two of the biggest DAF providers. Daffy is not nearly as well established but I like the UX. Honestly I just use it because

Fidelity and Vanguard charitable are two of the biggest DAF providers. Daffy is not nearly as well established but I like the UX. Honestly I just use it because donating to most charities via bank transfer is a massive pain and Daffy makes it simple.