OpenAI vs Microsoft

OpenAI was founded in December 2015 as a non-profit research laboratory with a $1 billion pledge from its founders — including Elon Musk, Sam Altman, and Peter Thiel. The stated mission was to ensure that artificial general intelligence benefits all of humanity rather than being controlled by any single company or government. Musk later said he co-founded OpenAI specifically because he was terrified of what Google might build.

OpenAI converted from a non-profit to a "capped profit" structure in 2019, allowing investors returns up to 100 times their investment. Microsoft invested $1 billion. Critics argued this was a non-profit in name only. By 2023, Microsoft had invested $10 billion in total, securing exclusive access to GPT-4 and integrating it across Word, Excel, Teams, and Bing. OpenAI had become the most commercially significant AI company in history — while still nominally describing itself as a safety-focused research lab.

OpenAI launched ChatGPT on November 30, 2022 as "a research preview." It reached one million users in five days. It reached 100 million users in two months — the fastest consumer product adoption in history. Google declared an internal code red. The AI era had visibly, undeniably begun. Elon Musk, who had left OpenAI's board in 2018, watched from the outside and would soon found a competitor.

On November 17, 2023, OpenAI's board fired CEO Sam Altman without warning. Within 48 hours, nearly 700 OpenAI employees signed a letter threatening to resign unless Altman was reinstated. Five days later, Altman returned as CEO. Three of the four board members who had fired him were replaced. It was the most dramatic corporate governance crisis in Silicon Valley history — and it changed nothing about OpenAI's trajectory.

OpenAI ended 2025 with over $20 billion in annualised revenue — growing at a rate the technology industry had never seen before. In March 2026, it raised $122 billion in fresh capital at an $852 billion post-money valuation, making it the most valuable private technology company in history. Sam Altman, the CEO who built all of this, owns 0% of the company. The Wall Street Journal reported in April 2026 that OpenAI had missed internal revenue targets for early 2026 and that CFO Sarah Friar had raised concerns about whether revenue could support the $1.4 trillion in AI infrastructure commitments the company had signed. OpenAI disputed the report. The tension between its commercial ambitions and its safety mission — which had led its founders to leave Anthropic — remained unresolved.

In January 1975, Paul Allen showed Bill Gates an issue of Popular Electronics featuring the Altair 8800. Neither of them had written a BASIC interpreter for it. But Gates called MITS and told them Microsoft had a working version ready. They then had eight weeks to actually build it. It worked. Gates was 19.

IBM approached Microsoft in 1980 to write an operating system for its new PC. Microsoft didn't have one. Gates bought QDOS from a Seattle programmer for $50,000, renamed it MS-DOS, and licensed it to IBM — while retaining the right to license it to other manufacturers. IBM thought hardware was the business. Gates understood it was software. The decision made Microsoft the most powerful company in computing for the next two decades.

When Satya Nadella became CEO in 2014, Microsoft was widely regarded as a company that had missed mobile, missed search, and missed social. Nadella pivoted to cloud computing, transformed Microsoft's culture from internal competition to growth mindset, and repositioned Azure as the foundation of the enterprise. The market cap tripled in his first five years. The transformation is studied in business schools as one of the greatest corporate turnarounds in history.

Microsoft invested $10 billion in OpenAI in January 2023, securing exclusive access to GPT-4. Within months, "Copilot" had been embedded in Word, Excel, Teams, GitHub, and Bing — repositioning Microsoft as the leading AI company in enterprise software. By early 2025, Microsoft's AI business had crossed $13 billion in annualised revenue, growing 175% year-over-year.

By Q3 fiscal 2026, Microsoft's AI business had surpassed $37 billion in annualised revenue — growing 123% year-over-year. Azure revenue grew 40%. Microsoft 365 Copilot had over 20 million paid seats, with the number of enterprise customers deploying more than 50,000 seats having quadrupled year-over-year. Cloud revenue crossed $50 billion in a single quarter. Microsoft had extended its OpenAI partnership, securing a 27% stake in the company and cementing its position as the most important distribution partner for large language models in enterprise software.