OpenAI Has Already Made Six Acquisitions in 2026 Nearly Matching All of Last Year
Latest purchases of open-source tools Astral and Promptfoo signal shift toward developer ecosystem control
The company's latest purchases include Astral, a creator of open-source developer tools acquired on March 19, and Promptfoo, an open-source tool for testing AI applications. Both acquisitions reflect a pattern of absorbing popular open-source projects that developers rely on.
Overall, the San Francisco-based company has now acquired 17 companies in the past three years according to Crunchbase data. The acceleration is stark: just one acquisition in 2023 (Global Illumination), two in 2024 (Rockset and Multi), and then a surge beginning in April 2025 that has continued to intensify.
The buying spree comes as OpenAI faces mounting competition from Anthropic, Google, and a growing field of open-source alternatives. By acquiring the tools that developers use to build and test AI applications, OpenAI is attempting to create a more integrated ecosystem that keeps developers within its orbit.
Analysis
Why This Matters
OpenAI's acquisition of open-source projects raises questions about the future independence of tools that many developers depend on. History suggests that corporate acquisitions of popular open-source projects often lead to commercialisation or feature restrictions.
Background
The AI industry has entered a consolidation phase, with well-funded companies acquiring smaller players to build moats around their platforms. OpenAI's focus on developer tools suggests it sees ecosystem control as a key competitive advantage.
What to Watch
Whether acquired open-source projects remain truly open, and how the developer community reacts to its favourite tools being absorbed by a single company.