As-salaamu ‘alikum wa rahmatullah,
This update was a long time in the making. After exchanging emails with Kiva, we discovered that even Islamic MFIs don’t use exclusively Islamic loans. You have to verify on a loan-by-loan basis to know which ones are 0% loans.
How can you do this? Details are on the 0% Interest Loans page. In summary, you need to look for the phrase “charges 0% interest on this loan” under “Additional information about this loan” on the loan profile page.
May Allah forgive our mistakes and grant us all Jannah (ameen).