Global CX AI Leader Sierra (Headquartered in San Francisco) Acquires OPERA TECH as a Wholly Owned Subsidiary

Today, OPERA TECH Inc. (Headquarters: Minato-ku, Tokyo; President: Keita Morikawa; hereinafter "the Company"), a provider of AI contact center solutions for large enterprises, is pleased to announce that it has been acquired by San Francisco-based Sierra Technologies, Inc. (hereinafter "Sierra") and has become a wholly owned subsidiary.

About Sierra Sierra is a company founded in 2023 by Bret Taylor, Chair of the OpenAI Board of Directors, and Clay Bavor, formerly of Google. The company provides software that enables enterprises to improve their "Customer Experience (CX)" by leveraging AI agents.

- Bret Taylor: After co-developing Google Maps at Google, he served as CTO of Facebook, Chair of the Board at Twitter, and Co-CEO of Salesforce. He currently serves as Chair of the Board at OpenAI. - Clay Bavor: Spent 18 years at Google, where he oversaw Google Workspace, Google Labs, and the AR/VR division. He led the launches of Daydream, Starline, and Google Lens.

Sierra provides a customizable AI agent construction platform for large enterprises, evolving customer service operations—which have traditionally relied on human labor—into a scalable software model. This allows companies to achieve cost reductions while enabling operators to focus on higher value-added tasks.

- Revenue Performance: Achieved $150 million (approx. 21 billion yen) in Annual Recurring Revenue (ARR) within two years of founding. - Funding: Raised a total of $635 million (approx. 85.8 billion yen) from investors including Sequoia Capital, Benchmark, ICONIQ Capital, Thrive Capital, Greenoaks Capital, and SoftBank Vision Fund. - Valuation: Approximately $10 billion (approx. 1.5 trillion yen). - Customers (details here): Prudential, Singtel, FOX, Gap, The North Face, Sky, Discord, Cigna, SoFi, Clear, Safelite, Sonos, Vans, Rivian, Next, and others.

Implementation Examples - Singtel (Leading Asian communication technology company): Launched production operations in 10 weeks, achieving an inquiry resolution rate of over 70%. - Next (Major UK retailer): Launched AI agent production operations in 6 weeks, now handling customer support in 83 countries and 48 languages. - Rocket Mortgage (Major US mortgage lender): Increased procedure completion rate by 4x when using AI agents, facilitating $1 billion in monthly loan volume. - Cigna (One of the world's largest health insurance companies): Launched production operations in 8 weeks, reducing patient authentication time by 80%. - SoFi (Major US neobank): Achieved a 33% increase in customer satisfaction after introducing AI agents.

Tokyo (Japan) Office Sierra's Tokyo office is located in the Toranomon/Kasumigaseki area and is fully operational in providing services to Japanese clients. For more details, please see the blog post from December 2025 announcing Sierra's entry into the Japanese market.

Future Outlook We will maximize customer value and expand our business by combining our customer base, operational understanding, and implementation capabilities in the Japanese market with Sierra's AI technology and products, which are recognized as world-class category leaders.

Moving forward, as part of Sierra, we will contribute to the widespread adoption of AI agent technology and the improvement of customer experiences for companies around the world, while supporting Japanese companies in providing more comfortable and warm customer experiences.

To Japanese Enterprises We look forward to creating better and more human-like customer experiences together through AI. If you are interested in our products or services, please contact us via our inquiry form.

For Those Interested in Working at Sierra If you are interested in taking on the challenge of working at an enterprise AI company, please apply via our careers page.

Official Comments - Sierra Official Blog (2026/03/27): Sierra Acquires Japanese AI Company "OPERA TECH" - Bret Taylor's Comment (X, 2026/03/27) - Keita Morikawa's Comment (X, 2026/03/27)