All those options are a little different. OpenPhil is planning to give to substantially different charities from GiveWell recommended charities: http://www.ope

All those options are a little different. OpenPhil is planning to give to substantially different charities from GiveWell recommended charities: http://www.open-philanthropy.org/ http://www.open-philanthropy.org/ Giving to GiveWell or Giving What We Can means your money is spent on research and advocacy, probably resulting in a greater total impact: https://80000hours.org/2015/06/donating-to-giving-what-we-can-is-higher-impact-than-donating-to-givewell-recommended-charities/ https://80000hours.org/2015/06/donating-to-giving-what-we-ca... Giving to GiveWell also has the effect of increasing the funds available to OpenPhil, since OpenPhil (to some extent) makes up the short fall in GiveWell's funding. The Giving What We Can Trust is just a convenient way to have a Donor Advised Fund. The money goes to whichever charities you like. https://www.givingwhatwecan.org/trust https://www.givingwhatwecan.org/trust