Sierra acquires Takeoff and launches Horizon, a runtime for long-horizon outcome-priced agents

CMSWire·medium signal

Sierra announced on July 23 that it acquired AI agent startup Takeoff and is combining the teams behind a new platform called Horizon for long-running, outcome-driven enterprise agents. Takeoff built a 'long-horizon agent runtime' for end-to-end tasks in lending and healthcare, and reportedly went from $0 to nearly eight figures ARR in about seven months with a three-person team by pricing on revenue-aligned outcomes rather than inference APIs. Sierra closed a $950M Series E at a $15B valuation in May 2026 and crossed $150M ARR, so this is the outcome-pricing thesis being bought rather than built.