Contemporary research on politics and elections in Southeast Asia focuses heavily on clientelism in its analysis. Such analyses emphasise the rising importance of “brokers” who connect politicians to voters, often through vote-buying or other forms of corruption and dependency. Here we argue that the broker system can only be a temporary phenomenon, capable of reinforcing clientelistic ties in the short term, but subject to ongoing erosion of the same shifting relationships that made brokers necessary. Indeed, we argue, the broker system is already being replaced by different forms of networks that are less subject to vertical hierarchies and personal ties. This article examines the changing dynamics of political organisation in contemporary Thailand, concentrating on familial dynasties, Red Shirts, and student networks. The study argues that modern communication technologies enabled and political events motivated the creation of new types of networks to challenge the established clientelistic relationships. The Red Shirts network combines vertical patron-client relationships with horizontal, community-focused interactions afforded by modern media. Students’ networks have largely abandoned traditional hierarchical structures in favour of more egalitarian, decentralised, and online-oriented organisational forms. Even familial dynasties, which have relied most heavily on brokers, have begun to adapt new techniques to supplement their use of brokers. The article concludes that emerging participatory political networks, founded on innovative technologies and adaptive strategies and shaped by class, regional, and generational disparities, are transforming political engagement in Thailand and challenging the entrenched clientelistic relations that underpin the current conservative social order.