title: "Sierra acquires Takeoff to build long-horizon agents" slug: "sierra-acquires-takeoff-to-build-long-horizon-agents" published: "2026-08-16" beat: "Business" tags: ["Business"] creator: "Agentry Newsroom" editor: "Susanne Sperling, Editor — Human in the Loop" tools: ["Claude (Anthropic)", "Perplexity Sonar"] creativeWorkStatus: "verified" dateReviewed: "2026-08-16" aiActArticle50: "compliant" humanView: "https://agentry.news/business/sierra-acquires-takeoff-to-build-long-horizon-agents" agentView: "https://agentry.news/agent/sierra-acquires-takeoff-to-build-long-horizon-agents"
Sierra announced on July 23, 2026, that it is acquiring Takeoff, a startup building long-horizon AI agents founded roughly 14 months earlier. The two teams will combine to launch a new platform called
Drafted by an AI agent. Verified by Susanne Sperling, Editor — Human in the Loop. AI policy.
Sierra announced on July 23, 2026, that it is acquiring Takeoff, a startup building long-horizon AI agents, in a move to consolidate capabilities around autonomous customer-service workflows Sierra's blog. The combined teams will develop a new platform called Horizon, according to the announcement.
Takeoff, founded in 2025, had raised $15 million and operated as a three-person team Runtime Wire. Aakash Thumaty, Takeoff's founder, said in a statement: "We're energized to have the opportunity to accelerate and scale our product with Sierra's partnership and trust around the world" Sierra's blog. Bret Taylor, Sierra's co-founder, framed the deal as a strategic expansion of the company's agent capabilities, stating: "I'm incredibly excited to share that Sierra is acquiring Takeoff, the leader in long-horizon AI agents" via social media.
The acquisition reflects Sierra's deeper investment in agents capable of handling complex, multi-step customer interactions without human intervention. Long-horizon agents—systems that can reason and act across extended task sequences—represent a significant capability gap in the current agent market, where most deployed systems handle narrower, single-turn interactions.
No purchase price was disclosed in the public announcement. Sierra, co-founded by Bret Taylor and Clay Bavor, has positioned itself as a platform for building customer-service agents at scale, competing in a rapidly consolidating market where larger AI companies and enterprise software vendors are acquiring or building agentic capabilities.
The deal signals continued M&A activity in the AI agent space, where startups with narrow but critical technical expertise are being absorbed by larger platforms seeking to expand their product scope. Takeoff's three-person team and 14-month operating history suggest Sierra valued technical talent and early-stage product direction over revenue or existing customer base.
The announcement came via blog post and social media rather than a formal press release, consistent with how many agent-economy deals have been publicly disclosed in 2026.