You can find the foundation's deed document in original German language:
pEp-Stiftungsurkunde (PDF)
It shows that the foundation started its mission with two kinds of donations, money and code:
- CHF 50'000 received in cash (donated by Leon Schumacher)
- p≡p engine and p≡p adapters under GNU GPL v3 license (donated by Volker Birk)