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.

"Multimodal agents" on a blurry green and pink background

Next gen multimodal agents: an interface that morphs with the conversation

Sierra’s multimodal agents bring voice, text, and visuals into the same conversation, so customers get the best of each medium without having to pick just one.

2026年9月10日

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Hyper-𝜏-bench: Evaluating agents that build agents

Today we’re open-sourcing hyper-𝜏-bench, a new long horizon agent evaluation that measures how well models can not only act as an agent, but construct one.

2026年9月8日

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Release governance: guardrails for agents at scale

Software teams don't ship without linting, code review, and canary deploys. Release governance brings that same discipline to Sierra: the checks, approvals, and staged rollouts that move a change safely from a builder's Workspace to a live customer conversation.

2026年8月20日

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Defense in depth in the age of agents

At Sierra, we build agents using goals and guardrails so they can think and reason independently, whether originating a mortgage, disputing a charge, or helping select the right pair of skis. That freedom is what makes them so powerful — and the guardrails they are given so important.

2026年8月13日

The follow-up is the sale

With Sierra’s long-running Horizon agents, insurers can now proactively engage every prospective customer over days, weeks, or months — staying with them until they buy or move on.

2026年8月12日

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Teaching agents to navigate janky IVR systems

Agents built on Sierra can now navigate the most challenging IVR systems out of the box: they understand when to call, how to get through a multi-level menu, when to stay silent, and how to recognize when they’ve reached a person.

2026年8月11日

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Introducing Voice Personas

What an agent does and how it expresses itself are two different things. Today, we’re launching Voice Personas so you can design both.

2026年8月7日

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Rent the intelligence, own the relationship

Meet Context Engine, which turns what a business knows into decisions an agent can act on when an outcome is on the line. It’s what enables long-running Horizon agents that can pursue business outcomes over days, weeks or months, with every interaction making the next one a little smarter so that your competitive advantage compounds over time.

2026年8月4日

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The next Horizon in agents

Horizon agents orchestrate outbound and inbound interactions over days or weeks — not just single conversations. A context engine and long-horizon planning turn every interaction into a compounding advantage, so your agents get smarter as your customer relationships deepen. It's Sierra's outcomes-based model at scale: you pay for results, not tokens.

2026年7月16日

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