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OpenAI agreed on September 2, 2025, to acquire Bellevue, Washington-based Statsig for approximately $1.1 billion in an all-stock transaction. The deal brings Statsig’s experimentation software, engineering team and founder Vijaye Raji into OpenAI, where Raji became chief technology officer of Applications reporting to Fidji Simo. It is both a software acquisition and a talent transaction, and it strengthens OpenAI’s rapidly expanding Bellevue operation.
The deal at a glance
| Item | Reported detail |
|---|---|
| Announcement | September 2, 2025 |
| Value and structure | Approximately $1.1 billion, all stock |
| Target | Statsig, founded in February 2021 and headquartered in Bellevue |
| OpenAI role for Vijaye Raji | Chief technology officer of Applications |
| Raji’s remit | Product engineering for ChatGPT and Codex, including infrastructure and Integrity |
| Initial customer plan | Statsig would continue operating independently and serving existing customers |
| Employee plan | Statsig employees were expected to have the option to join OpenAI |
The announcement said regulatory approval was required. Later 2026 reporting describes Statsig as part of OpenAI and Raji as an OpenAI executive, but the available reports do not include a separate formal closing announcement. It is therefore most precise to distinguish the announced agreement from the subsequent evidence of operational integration.
GeekWire reported the price and regional implications, while OpenAI’s announcement set out Raji’s role.
What Statsig actually makes
Statsig is not an AI-model developer. Its platform supplies the operating layer product teams use to change software safely and measure the results. Its stated capabilities include:
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- Feature flags and staged rollouts.
- Product analytics and real-time decision-making.
- Session replay.
- Marketing experiments and web analytics.
For an AI product, that infrastructure can be particularly valuable. Interfaces, prompts, model versions and safety controls may change frequently, while outputs are probabilistic rather than identical on every request. Teams can use segmented rollouts, outcome metrics and rapid reversals instead of releasing every change to every user at once. That is an analytical implication of Statsig’s capabilities, not a stated promise that the acquisition will produce a specific performance improvement.
Statsig’s own account of the transaction describes the broader platform and its continued customer focus at statsig.com.
Why OpenAI wanted Statsig
A platform OpenAI teams already knew
Bloomberg reported that OpenAI employees were already using Statsig. Buying a system internal teams understand can reduce the risk of adopting an unfamiliar tool and gives OpenAI a direct path to influence its development.
Faster product iteration
ChatGPT and Codex require constant testing of interfaces, workflows, pricing, onboarding and model-powered features. Statsig could give those teams a common framework for experimentation, feature control and measurement. OpenAI has not publicly stated that this was the sole or formal rationale, so it should be treated as a reasonable strategic inference.
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Raji’s appointment may be as important as the software. OpenAI said he would lead product engineering for ChatGPT and Codex, with responsibilities spanning infrastructure and Integrity. That puts a founder who built a product-operations company in charge of major application execution.
An established Bellevue organization
Reports counted more than 100 Seattle-area Statsig employees at one point and 155 employees in another report, reflecting different dates or counting methods. Either way, OpenAI obtained an operating team, local recruiting base and office culture rather than starting its regional organization from zero.
Acquisition, acquihire or both?
The evidence supports a hybrid description. OpenAI did not announce that Statsig’s product was being shut down: the stated plan was independent operation and continued service to customers. At the same time, Raji received a senior OpenAI role and employees were offered a path to transition. The transaction therefore combines a technology purchase, an acquihire element and a regional talent investment. Calling it purely an acquihire would ignore the commercial platform; calling it only a software deal would understate the leadership and team transfer.
What the $1.1 billion price signals
The reported consideration was approximately $1.1 billion in OpenAI stock, not cash. Bloomberg and GeekWire linked that figure to Statsig’s $100 million 2025 funding round, which valued the company at about $1.1 billion. The Information, as cited by GeekWire, reported that the consideration represented roughly 0.4% of OpenAI’s shares.
An all-stock deal gives Statsig investors exposure to OpenAI’s future value instead of a cash exit. Because the reported price matched the latest private valuation, a large acquisition premium has not been established. The valuation may also reflect the strategic value of Raji and the engineering team as well as Statsig’s standalone software; that is an interpretation, not a disclosed allocation of the purchase price.
What happens to Statsig customers?
The initial commitment was clear: Statsig would remain based in the Seattle area, operate independently and continue serving its existing customers. That is a starting plan, not a guarantee that branding, contracts or product priorities will never change.
Customers should watch for answers to several practical questions:
- Will Statsig remain a separately branded commercial product?
- Will customer data stay segregated from OpenAI’s internal product data?
- Will terms of service, data-processing agreements, security documentation or data-residency options change?
- Will OpenAI use the technology only internally or develop it as a larger enterprise offering?
- Will customers that compete with OpenAI remain comfortable with the vendor relationship?
The cited announcements do not resolve those issues. Enterprises considering or renewing a contract should seek written answers, review any updated agreements and preserve migration or data-export options.
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Raji founded Statsig and served as its CEO. Before that, he was a Facebook engineering leader and helped build Facebook’s Seattle operation. GeekWire reported that he grew that office from a small operation to roughly 5,000 people; that headcount description is attributed to the publication rather than independently verified here.
At OpenAI, Raji reports to Fidji Simo as CTO of Applications. His remit over ChatGPT and Codex makes the leadership change a direct product-engineering bet, not a ceremonial title attached to the acquisition.
How Bellevue became a major OpenAI hub
| Date | Development |
|---|---|
| 2024 | OpenAI established a Bellevue presence to reach the region’s engineering talent. |
| September 2025 | OpenAI announced the Statsig acquisition and Raji’s appointment. |
| February 2026 | Reports said OpenAI agreed to lease additional floors at City Center Plaza, bringing its Bellevue footprint to about 296,000 square feet. |
| March 2026 | GeekWire described Bellevue as OpenAI’s largest office outside San Francisco, with Statsig forming its nucleus. |
The approximately 296,000-square-foot figure implies capacity for more than 1,000 employees using typical office-density assumptions; it is not confirmed occupancy. GeekWire also estimated more than 300 Seattle-area OpenAI employees from LinkedIn data in February 2026, which is not an official company headcount.
Bellevue places OpenAI near Microsoft’s Redmond headquarters and Amazon’s Seattle and Bellevue operations, alongside a deep pool of cloud and software engineers. This is a major satellite hub, not evidence that San Francisco ceased to be OpenAI’s headquarters. The office expansion also began before the Statsig deal, so the acquisition should not be presented as the sole cause of every real-estate decision. See GeekWire’s lease report and its inside look at the Bellevue office.
What it says about Seattle’s startup ecosystem
Statsig was founded in 2021, raised more than $153 million according to GeekWire, reached a reported $1.1 billion valuation after its 2025 round and ranked No. 5 on the GeekWire 200 regional startup index. Madrona managing director S. “Soma” Somasegar, an early investor, described the transaction as evidence of Seattle’s talent and innovation strength.
The deal validates the region’s ability to produce companies and executives attractive to frontier-AI firms. It also highlights a tension: successful startups can generate valuable exits while becoming part of large outside companies rather than independent local category leaders. Corporate hiring, startup formation, venture funding and independent headquarters are different measures of an “AI hub”; this transaction proves strength in some of them, not dominance in all.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Work culture is context, not proof of causation
Statsig was known for a five-day-a-week in-office policy. Coverage noted the trade-offs: higher office costs and commuting burdens, a narrower geographic hiring pool and the possibility of dense collaboration. Commentary also cited competing evidence about flexible work and company growth.
The acquisition shows that a company with that operating model reached a major outcome. It does not prove that five-day attendance caused the outcome or that the policy works universally. OpenAI’s decision to retain Bellevue as an important operating base is a separate question from whether every startup should copy Statsig’s schedule. The workplace discussion is summarized in GeekWire’s analysis.
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Risks and unresolved questions
Integration and customer trust
OpenAI must integrate a commercial enterprise-software business without weakening Statsig’s support, roadmap or data controls. Customers may value OpenAI’s resources but worry about vendor neutrality, confidentiality and future conflicts if they compete with OpenAI.
Employee transitions
Joining OpenAI can bring access to larger products, infrastructure and compensation opportunities. It can also mean new reporting lines, performance systems and less startup autonomy. The public announcement did not establish that every employee received identical transition terms.
Competition and concentration
Statsig overlaps with categories served by LaunchDarkly, Optimizely, Amplitude, Eppo and GrowthBook. OpenAI ownership may make the platform more attractive to buyers seeking deep technical backing, while making others more cautious about data governance or strategic conflicts. Available sources do not establish market share or a new market leader.
Regulatory status
The original announcement was subject to regulatory approval. Later coverage indicates operational integration, but without a separately reported closing record, definitive claims about the legal completion date should be avoided.
Bottom line
OpenAI’s Statsig transaction is simultaneously a purchase of experimentation infrastructure, a senior product-leadership hire, a transfer of an established engineering team and a vote of confidence in Bellevue. Its success will be measured less by the headline price than by whether OpenAI can preserve customer trust and product quality while using Statsig’s tools and people to build ChatGPT and Codex at greater speed.
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