Center for High Impact Philanthropy

Philadelphia's educational research institute listings are easy to start with by phone: all 32 entries include a number, and 30 of them also list a website you can check before calling. That reach matters here since the category covers everything from university-affiliated labs to smaller independent research groups, and most concentrate in one part of the city. Seventeen of the 32 sit in the 19104 zip alone, with the rest scattered in ones and twos across other Philadelphia zips, so if you're comparing a few options nearby, call two or three and see who answers first.

Paid placements get labeled Sponsored on this page, and none of the current 32 listings carry that tag, so what you're looking at is the directory's plain default order, not a boosted or curated one. If you run one of these institutes and the phone number or website on file is wrong, you can claim the listing and correct it yourself. That's worth doing especially outside 19104, where a single zip like 19122 or 19102 may only show one or two nearby results for someone searching.