Sierra Acquires Japanese AI Company "OPERA TECH"

This article is a reprint of a blog post by Sierra.

Today, Sierra is pleased to announce the acquisition of OPERA TECH, a Tokyo-based enterprise AI company.

OPERA TECH co-founders Keita Morikawa and Kiyoto Kunii founded the company with the vision of "providing high-quality AI-driven customer experiences to large enterprises." This philosophy aligns with our own mission: that AI agents should serve as the foundation for customer experience (CX), supporting every touchpoint with customers—including product recommendations, customer support, user registration, troubleshooting, and churn prevention.

To Japanese Enterprises:

Hundreds of the world's leading companies are already using Sierra to build more natural and superior customer experiences. If you are interested, please contact us via our inquiry form.

Case Studies: - Singtel (Asia's leading communications technology company): Launched production in 10 weeks, achieving a resolution rate of over 70% for inquiries. - Next (UK's leading retailer): Launched AI agents in 6 weeks, now providing customer support in 48 languages across 83 countries. - Rocket Mortgage (US's leading mortgage lender): Increased transaction completion rates by 4x when using AI agents, facilitating $1 billion in monthly loans. - Cigna (One of the world's largest health insurance companies): Launched in 8 weeks, reducing patient authentication time by 80%. - SoFi (US's leading neobank): Achieved a 33% increase in customer satisfaction after implementing AI agents.

Japan is one of the most demanding enterprise software markets in the world, where companies prioritize high quality, precision, and reliability in long-term partnerships.

OPERA TECH has a proven track record of supporting many of Japan's largest companies and possesses a strong network. We are very excited to create new business opportunities together.

For Those Interested in Working at Sierra:

If you are interested in taking on a challenge at a rapidly growing 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)