This article explains composability in DeFi—the ability to combine different protocols and smart contracts to create innovative financial products. It highlights how Stellar's existing features like its DEX, multi-asset support, and path payments enable developers to build connected financial applications, contrasting DeFi's permissionless, transparent approach with the siloed nature of traditional finance.

Composability in DeFi allows developers to leverage and combine existing protocols, smart contracts, and financial services to create complex financial products—like financial LEGO blocks. The article explains that Stellar's network includes a decentralized exchange, multi-asset support, path payments, and other tools that facilitate composable applications. It describes how composability works through permissionless integration, transparent interactions, programmable money, and oracle verification. The article covers types of composability (atomic, universal, aggregated, vertical), contrasts DeFi's open ecosystem with traditional finance's siloed institutions, and highlights composable components like AMMs, lending protocols, stablecoins, yield aggregators, and cross-border payment solutions. It also addresses risks including interdependence, complexity, smart contract vulnerabilities, and oracle failures, while encouraging developers to join the Stellar community and build on Soroban.