The Sierra blog

March 25, 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.

February 6, 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.

November 5, 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.

November 5, 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.

Eric Eyken-Sluyters joins Sierra as President of Field Operations

We are excited to announce that Eric Eyken-Sluyters will be joining Sierra to lead our global Sales, Sales Engineering, and Partnerships teams.

April 1, 2026

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Explorer: The agent-optimizing agent

Explorer is Sierra's agent-optimizing agent — continuously analyzing conversations in the background, surfacing what's happening, why, and exactly what to do about it. Here's how hundreds of businesses are using it to continuously improve their agents and customer experience.

April 1, 2026

Sierra acquires Opera Tech in Japan

Today, we’re announcing that Sierra has acquired Opera Tech, a Tokyo-based enterprise AI startup.

March 27, 2026

Agents as a Service

March 25, 2026

Text that reads "Building in Australia" on a blurred orange and brown background.

No worries vs please hold: Sierra comes to Australia

We're excited to share that we are opening an office in Sydney, Australia, where we'll partner with leading companies to deliver faster, more human customer experiences.

March 23, 2026

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𝜏³-Bench: Advancing agent benchmarking to knowledge and voice

𝜏³-Bench is here. We've expanded agent evaluation to two new frontiers: knowledge retrieval and voice.

March 18, 2026

White text "Building in Spain" on a blurred, grainy red and cream background

All about the agent: Sierra launches in Spain

Sierra is already working with a number of the biggest businesses in Spain to build better, more human experiences with AI. We’re excited to build deeper partnerships as we open our office in Madrid.

March 12, 2026

White text "Resilience without compromise" on a blurry, grainy background with vertical streaks of pink, orange, and dark colors.

Preserving agent behavior while serving LLMs reliably

Keeping an AI agent online isn’t enough — its behavior must remain consistent under provider stress. Here’s how we built the infrastructure to make that possible.

February 13, 2026

Year two in review

February 6, 2026

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