Three criteria for top charity status

To become a GiveWell top charity, an organization must meet three criteria: evidence strong enough that it is significantly more likely than not to be having large effect (high confidence, not a 25% chance of large effect); estimated impact per dollar exceeding GiveWell's current funding threshold (currently 10x direct cash transfers); and having received significant prior funding (at least $10 million for at least a year) so GiveWell has experience with it.