Sierra acquired Takeoff to build long-horizon AI agents. Leaders gain access to scalable, outcome-driven AI agents across industries. Sierra has acquired AI agent startup Takeoff and unveiled Horizon, a joint platform for long-running, outcome-driven enterprise agents. Takeoff built what it describes as a "long-horizon agent runtime" designed to let AI agents handle end-to-end tasks across industries including lending and healthcare. The acquisition aligns with Sierra's broader strategy of scaling industry-specific AI agents globally.