The Sierra blog

25 March 2026

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.

6 February 2026

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.

5 November 2025

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.

5 November 2025

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.

Sierra speaks

Voice is here. Sierra's AI agents can now engage consumers with rich, natural conversations over the phone—no wait times, no frustration. Learn how this new capability is reshaping the future of customer service.

9 October 2024

Image of a frustrating chatbot conversation

Bye bye, bots! 5 reasons to say ‘Hello!’ to AI agents

Chatbots continue to fall short of customer and company expectations, struggling to solve problems, communicate with clarity, or self-improve over time. Sierra’s AI agents offer a superior alternative by handling complex tasks, communicating using natural language, and continuously improving to meet evolving customer needs. It’s time to move beyond chatbots and elevate your customer experience with AI agents.

6 September 2024

Shipping and scaling AI agents

Sierra agents are refreshing SiriusXM radios, debugging Sonos setup flows, and managing OluKai returns and exchanges. In this post, we share lessons from building AI agents at scale.

25 July 2024

Meet the AI agent engineer

Agent engineers at Sierra design, build, and maintain our AI agents. They tackle problems at the intersection of software engineering, frontier AI deployment, and the most pressing challenges of our customers.

11 July 2024

Sierra AI agent helping retail brands manage holiday rush

The holiday rush has started: How OluKai and Sonos gear up for the season with AI

For most direct-to-consumer and retail brands, the holiday season is the busiest time of year. Not only does this season represent a massive revenue opportunity, but demand surges stress-test systems and staffing. Deploying an AI agent makes it possible for companies to get ahead of the rush, scale up, deliver a better customer experience, and drive sales.

2 July 2024

𝜏-Bench: Benchmarking AI agents for the real-world

Sierra’s AI research team is on a mission to advance the frontier of conversational AI agents. In this research paper, we present a new benchmark for evaluating AI agents' performance and reliability in real-world settings, with dynamic user and tool interaction.

20 June 2024

The Agent Development Life Cycle

An autonomous AI agent is a new type of software that requires a new approach to development. Sierra has developed a novel, integrated approach to developing agents, from development to testing and release management. We call this the Agent Development Life Cycle.

3 June 2024

The Guide to AI Agents

AI agents are autonomous software systems that can reason, make decisions, and pursue goals with creativity and flexibility. They’ll soon be everywhere, helping consumers, employees, and businesses alike.

23 May 2024

Meet Sierra, the conversational AI platform for businesses

13 February 2024

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