AI Startups Are Becoming Serial Acquirers as M&A Accelerates

Summary

Crunchbase data shows that venture-backed AI companies acquired 195 AI startups through Sept. 29, 14% more than during all of 2025, while the number of buyers rose only 2%. The increase was driven largely by repeat acquirers: 67 companies that bought more than once over the past three years accounted for about 42% of tracked transactions. OpenAI led the group with 20 AI-related acquisitions, including 10 this year. Anthropic and legal AI company Legora each announced five acquisitions in 2026, Harvey announced four, Sierra and coding company Cursor announced three each, and Cohere announced two. Recorded deal values were led by Nscale’s reported $1.65 billion purchase of Anyscale and Cyera’s $1 billion acquisition of Oasis Security; Anthropic’s Coefficient Bio deal was valued at $400 million, while OpenAI’s Glass Imaging acquisition was valued at $300 million. Only 12 of the 195 transactions disclosed prices, so total spending cannot be established. The article presents M&A as a way for well-funded startups to add products, enter markets and acquire specialized teams faster than internal development, often using highly valued stock. OpenAI’s purchases span healthcare data, scientific writing, developer infrastructure, security and talent. Legal AI companies are pursuing focused roll-ups: Harvey has bought tools for demos, data integration, asset management and agent testing, while Legora has acquired legal research, regulatory monitoring, document analysis and litigation products. Sierra’s deals support expansion in Japan, operational automation and long-horizon agents. For smaller targets, joining a larger platform can provide faster scale; TakeOff’s founder cited a near-eight-figure run rate with a three-person team before its acquisition by Sierra. The dataset excludes deals that were not publicly reported.