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.

The words "Agent guardrails" on a blurred dark blue background

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

The words "IVR navigation" on a blurred red, yellow and pink background

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

The word "Personas" on a blurred red, yellow and pink background

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

The words "Context Engine" on a blurred blue background

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

Our partnership with Plaid on a blurred purple and blue background

Plaid and Sierra partner to move AI agents from conversations to business outcomes

Through our partnership, customers can now securely connect their bank accounts with Plaid directly within Sierra’s agent.

2026年8月3日

"Agency" on a blurred light green background

Agency: Secure, scalable sandboxes for agents

The hardest part of building great agents isn't the model — it's everything around it. That’s where Agency comes in, the infrastructure that gives every Pinecone session and every task for Ghostwriter (our agent-building agent for customers) a secure place to live and run.

2026年7月29日

Text: Sierra acquires Takeoff, over an abstract red background

We’re excited to share that Sierra is acquiring Takeoff

Since the beginning of this year, Takeoff has gone from $0 in ARR to nearly 8 figures of revenue as of earlier this month. We’re energized to have the opportunity to accelerate and scale our platform with Sierra’s partnership and trust around the world.

2026年7月23日

"Building Sierra's MCP Gateway" on a blurred blue and brown background

Building Sierra’s MCP Gateway: An engineering iceberg

Sharing the biggest lessons we learned building Sierra’s MCP Gateway — and what it looks like to build software in an AI-first engineering organization.

2026年7月22日

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