Normally, we focus on identifying outstanding charities, and minimize the time spent on opaque or otherwise lackluster ones. But lately, we’ve gone into a bit more detail about our take on several of the best-known and most appealing charities out there.

What all of the charities below have in common is that (a) we have major questions and concerns about their activities; (b) the information necessary to see how serious these concerns are does not seem to be available. (In most cases our assessment is based on significant back-and-forth with the charities themselves, though in some cases we are going off their website.)

We think the above charities are fairly representative of “average” charities in international aid. Some tell better stories than others and some have more disclosure than others. But in almost all cases, international aid charities are (a) carrying out complex projects that can fail to do good (or even do harm) in a variety of ways, and (b) not systematically sharing the information that would make it possible to assess how their work is going.

GiveWell is devoted to finding charities in which we can have more confidence. We’ll be discussing our two top-rated charities working internationally in forthcoming posts.