Sierra ブログ

2026年3月27日

Sierra、日本発のAI企業「OPERA TECH」を買収

本日、Sierraは東京を拠点とするエンタープライズAI企業、株式会社OPERA TECHを買収したことを発表いたします。

Text: Sierra acquires Opera Tech in Japan.

2025年11月5日

Sierra Agent OS 2.0: from answers to memory and action

At Sierra Summit, we unveiled the future of AI agents: a single agent that works across every channel, learns from every interaction, and builds real customer relationships. With eight new products, including Agent Studio 2.0 and the Agent Data Platform, Sierra is turning the promise of AI-powered customer experience into reality.

2026年3月25日

Agents as a Service

Sierra is reimagining software for the agent era—where you simply describe the outcome, and intelligent agents build, execute, and continuously improve the work for you. Meet Ghostwriter, the agent that creates and optimizes other agents, turning your ideas into production-ready customer experiences without clicks, code, or complexity.

2026年2月6日

Year two in review

Sierra is heading into year three with over $150M in ARR, powered by rapid adoption from some of the world’s largest companies. The growth reflects a simple idea: when AI is built around real jobs to be done (not experiments), even the biggest enterprises can see meaningful impact fast.

White text "Year two" on a grainy background with diagonal orange, yellow, and blue color gradients.

2025年11月5日

Introducing Agent Data Platform

Sierra’s first-of-its-kind Agent Data Platform (ADP) gives agents memory, context, and intelligence — turning every interaction into a human, personalized experience. Powered by Agent OS, ADP helps companies move from answering questions to anticipating needs.

There's an agent for that, and it runs on Sierra

Today, we’re announcing that we’ve raised $350M additional capital at a valuation of $10B, led by Greenoaks, which is doubling down on Sierra.

2025年9月4日

Fast to build, faster to impact

With Sierra’s Agent OS, companies across industries are launching agents in weeks that scale globally, improve continuously, and deliver more human customer experiences from day one.

2025年9月2日

Gradient background with graduation cap icon

Calling new grads: APX year 2

Are you a college senior or recent graduate? If you’re driven to turn AI theory into practice, make an impact, and learn from some of the best in our industry, we’d love to build with you.

2025年9月2日

Change agents: Brex

By building its customer agent with Sierra, Brex has accelerated service by 90%, saved customers over 15,000 hours a year, and empowered both technical and non-technical teams to scale AI across the business.

2025年8月19日

Simulations: the secret behind every great agent

Sierra’s platform, Agent OS, enables you to create simulated conversations between agents and mock personas ensure reliability at scale. They are a new kind of testing, for a new kind of software.

2025年8月19日

Sierra is now ISO 42001 and ISO 27001 certified

We’re excited to share that Sierra is now certified by an accredited certification body to both ISO 27001 and ISO 42001.

2025年7月8日

A more reliable inference layer for foundation models

Foundation models are still less reliable than traditional web services, with more downtime and response times measured in seconds, not milliseconds. And as adoption grows, they’re accessed through a burgeoning ecosystem of providers and applications, which have similar functionality but different levels of reliability. Last year, we turned this bug into a feature—developing an adaptive routing client that dynamically selects providers to maximize uptime, minimize latency, and improve the overall experience.

2025年6月26日

The challenge with rolling your own agent

Short “time to demo” masks the challenge of building agents that can reliably take action without supervision, safely represent a brand, and operate at the scale needed to handle millions of customer interactions a year.

2025年6月17日

The future is build with, not build versus buy

Sierra’s platform gives businesses the freedom to build as much or as little of their agent as they choose—from our Agent OS, which handles all the under the hood complexity, while giving brands complete control over the parts that are unique to their business, to our expert team of engineers and product managers, which help launch agents quickly, and ensure they improve over time.

2025年6月17日

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