OpenHands (formerly OpenDevin) is an open-source project that lets you run a capable autonomous coding agent against tasks. It supports multiple LLM backends, runs in a container, and handles a wide range of software engineering tasks through a single agent session.
Fleet does not compete at the single-agent level. It provides the operational layer above individual agents: role assignments, a shared event bus, watcher daemons, approval gates, and audit trails. Where OpenHands is one highly capable agent, Fleet is the system that coordinates many of them.