Participatory Guarantee Systems (PGS) are alternative certification systems for organic smallholder farmers that involve direct participation by stakeholders in certifying organic production and processing. PGS were developed as a low-cost option for small farms serving local markets. In Uganda, several PGS groups have been established since 2007 when PGS was adopted as an alternative to costly third-party certification. These PGS groups range in size from 23 to over 1,250 approved organic farmers working together on commercial organic crop production and marketing. While PGS have helped farmers access markets, challenges remain in further sensitizing consumers and attracting more farmers to the group certification model.