Sierra acquires Takeoff to expand long-horizon AI agents
Sierra has acquired Takeoff, a startup founded in 2025 that builds long-horizon AI agents, for an undisclosed sum. Techmeme reports Takeoff was nearing $10 million in annualized revenue within months of launch.
Key takeaway
Enterprise agent platforms are buying specialized long-horizon execution talent instead of waiting for foundation models alone to close multi-step task reliability.
Context
Sierra’s purchase of Takeoff points to a build-versus-buy shift in production agent stacks: rather than only training or wrapping general models, customer-facing agent vendors are absorbing teams that already sell autonomous, multi-step workflows.
Takeoff’s reported path to nearly $10 million annualized revenue so soon after a 2025 founding underscores buyer demand for agents that can sustain longer task horizons, even while the acquisition price remains undisclosed and integration details are still scarce.
Numbers to know
- $10MTakeoff annualized revenue neared before the acquisition, per the Techmeme report