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.

Publish your agent to ChatGPT

Reach hundreds of millions of ChatGPT users with a single click — bringing your Sierra-built experiences into ChatGPT while maintaining full control and brand integrity.

2025年10月23日

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𝜏-Bench leaderboard: compare, explore, and understand agent performance

Introducing the 𝜏-Bench leaderboard — a community-driven platform where researchers can submit, verify, and compare results while exploring model behavior through interactive tools.

2025年10月13日

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Agent calling versus call my agent

Outbound voice is one of the hardest channels to get right — but when done well, it drives real results. From qualifying leads to confirming deliveries, Sierra’s agents make every call feel fast, natural, and human.

2025年10月10日

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Engineering low-latency voice agents

Latency shapes whether a voice agent feels human or robotic. Here’s how Sierra reduces it across every stage of the speech-to-speech pipeline.

2025年10月9日

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Multilingual voice: building agents that speak to everyone

Multilingual voice agents aren’t just a feature — they’re a bridge to better, more inclusive customer experiences.

2025年10月8日

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Load testing: how Sierra scales for surges

When demand spikes, reliability matters most. We load-test Sierra’s platform at massive scale — generating millions of calls — to guarantee agents stay fast, accurate, and reliable, no matter how high the traffic climbs.

2025年10月7日

Voice turns one

One year after launching voice, Sierra is powering hundreds of millions of conversations — showing how natural conversation is fast becoming the most powerful customer interface.

2025年10月6日

From LLMs to enterprise-grade agents

Sierra's Agent OS treats agent safety as a systems problem — reducing error rates through layered defenses and constant improvement.

2025年10月2日

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Agent Traces: getting to the fix, fast

Agent Traces give builders a step-by-step view into an agent’s decision-making, so they can understand not just what happened, but why.

2025年10月1日

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