In a surprise move, Zoom has chosen Oracle for its latest cloud infrastructure expansion as the company experiences unprecedented growth.

As COVID-19 has forced people to social distance, work from home, engage in remote learning and socialize digitally, Zoom has been one of the most popular platforms people have turned to. In short order, the platform went from 10 million daily users to over 300 million, putting a strain on the company’s infrastructure.

The company already uses AWS and Microsoft for cloud infrastructure but, in an effort to keep up with demand, Zoom has struck a deal with Oracle for its latest expansion. The choice is particularly surprising given Oracle’s current place in the market, far behind AWS, Microsoft and Google. One of the motivating factors was Oracle’s security, an area where Zoom has been working to improve.

“We recently experienced the most significant growth our business has ever seen, requiring massive increases in our service capacity. We explored multiple platforms, and Oracle Cloud Infrastructure was instrumental in helping us quickly scale our capacity and meet the needs of our new users,” said Zoom CEO Eric S. Yuan. “We chose Oracle Cloud Infrastructure because of its industry-leading security, outstanding performance, and unmatched level of support.”

“Video communications has become an essential part of our professional and personal lives, and Zoom has led this industry’s innovation,” said Oracle CEO Safra Catz. “We are proud to work with Zoom, as both their cloud infrastructure provider and as a customer, while they grow and continue to connect businesses, people and governments around the world.”

The deal is a huge win for Oracle as it endeavors to expand its market share, and wil likely lead to other companies looking to it as a viable option.

Note: Clarification added to show Zoom continues to use AWS and Microsoft.