# sierra.ai

> AI-optimized mirror of sierra.ai containing 50 pages totalling 41,183 words of clean markdown content, structured data, and semantic HTML. Original source: https://sierra.ai. Last updated: 2026-09-07T04:26:51.138Z.

Each page is available as HTML (with JSON-LD structured data) and Markdown (text-only, ideal for LLMs and RAG).

## Homepage

- [Better customer experiences | Sierra](/content/site-root.html): Sierra helps businesses build better, more human customer experiences with AI. (384 words)

## Articles & Blog Posts

- [The Sierra blog - Corporate | Sierra](/content/blog/corporate/index.html): Keep up to date with the latest insights and news from Sierra. (293 words)
- [The Sierra blog - Product | Sierra](/content/blog/product/index.html): Keep up to date with the latest insights and news from Sierra. (313 words)
- [What is voice AI? Enterprise guide to AI voice agents | Sierra](/content/blog/what-is-voice-ai/index.html): Learn how enterprise voice AI works and use seven call-readiness tests to evaluate hearing, latency, action, guardrails, and handoff. (1,817 words, Sep 1, 2026)
- [Building in Germany, Austria and Switzerland | Sierra](/content/blog/building-in-dach/index.html): We're excited to share that we are opening an office in Munich to serve companies across Germany, Austria and Switzerland.  (606 words, Aug 14, 2026)
- [The follow-up is the sale | Sierra](/content/blog/the-follow-up-is-the-sale/index.html): 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. (655 words, Aug 12, 2026)
- [Introducing Voice Personas | Sierra](/content/blog/introducing-voice-personas/index.html): What an agent does and how it expresses itself are two different things. Today, we’re launching Voice Personas so you can design both. (572 words, Aug 7, 2026)
- [Pinecone: Harnessing the wisdom of the workforce | Sierra](/content/blog/pinecone-harnessing-the-wisdom-of-the-workforce/index.html): As frontier models become more capable, companies are increasingly asking themselves the same question: What's our moat? We believe a large part of the answer lies in context. (2,297 words, Jul 15, 2026)
- [AI-pilling our company: lessons learned | Sierra](/content/blog/ai-pilling-our-company-lessons-learned/index.html): Our AI acceleration team has been developing agents for employees across every department at Sierra. Here's what they built — and lessons learned along the way. (1,470 words, Jul 9, 2026)
- [Takeaways from our Ghostwriter Hackathon | Sierra](/content/blog/takeaways-from-our-ghostwriter-hackathon/index.html): Last week, we hosted our first Ghostwriter Hackathon with 30 builders from 17 of the world's largest companies. Here's what we learned about who builds best in the age of AI. (446 words, Jul 1, 2026)
- [A new kind of builder | Sierra](/content/blog/how-customer-teams-became-software-builders/index.html): The people closest to your customers have the best context for improving the experience. Now they're the ones building the agents. (538 words, Jun 15, 2026)
- [Discovering what’s possible with AI for CX | Sierra](/content/blog/discovering-what-s-possible-with-ai-for-cx/index.html): Every CX leader right now is being asked the same question: What are you doing with AI? This series shares some of the earliest answers from the teams figuring it out.  (651 words, Jun 12, 2026)
- [Agent Strategist: Your PhD in applied AI | Sierra](/content/blog/agent-strategist-your-phd-in-applied-ai/index.html): Meet the Agent Strategist. Last year, this role barely existed. Today, it’s our fastest-growing team. (981 words, May 19, 2026)
- [Who monitors the monitors? | Sierra](/content/blog/agent-monitoring/index.html): Sierra's always-on evaluation layer use an LLM-as-judge to review every conversation so businesses can track agent quality and customer sentiment. But who evaluates the monitors? (564 words, May 7, 2026)
- [𝜏-voice: benchmarking real-time voice agents | Sierra](/content/blog/tau-voice-benchmarking-real-time-voice-agents-on-real-world-tasks.html): 𝜏-voice is a benchmark for real-time voice agents on 278 grounded customer-service tasks across retail, airline, and telecom. It pairs deterministic, end-to-end task scoring with realistic, controllable audio — diverse personas, environmental noise, and free-form turn-taking. (2,695 words, May 1, 2026)
- [The AI-native interview | Sierra](/content/blog/the-ai-native-interview/index.html): We’ve redesigned our engineering interview process from the ground up. (1,033 words, Apr 22, 2026)
- [Golden articles: Evaluating and improving search  | Sierra](/content/blog/evaluating-and-improving-search/index.html): Search evaluation shouldn’t be static—it should reflect what actually helps resolve real customer issues. By measuring performance daily against production conversations and feeding those signals back into the system, we've built a continuously improving system for resolving customers’ needs. (804 words, Apr 14, 2026)
- [Sierra acquires Opera Tech in Japan | Sierra](/content/blog/sierra-acquires-opera-tech-in-japan/index.html): Today, we’re announcing that Sierra has acquired Opera Tech, a Tokyo-based enterprise AI startup. (326 words, Mar 27, 2026)
- [Building in Australia | Sierra](/content/blog/sierra-comes-to-australia/index.html): Sierra is expanding to Sydney, bringing its AI agents to help Australian companies deliver faster, more human customer experiences. (341 words, Mar 23, 2026)
- [𝜏³-Bench: Advancing agent evaluation to knowledge and voice | Sierra](/content/blog/bench-advancing-agent-benchmarking-to-knowledge-and-voice.html): We're releasing 𝜏³-Bench, expanding agent evaluation to two new frontiers: knowledge retrieval and voice — the real-world conditions where agents are most likely to break. (1,283 words, Mar 18, 2026)
- [Preserving agent behavior while serving LLMs reliably | Sierra](/content/blog/model-failover/index.html): 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. (796 words, Feb 13, 2026)
- [Year two in review | Sierra](/content/blog/year-two-in-review/index.html): 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. (484 words, Feb 6, 2026)
- [Sierra and Stellarus: Advancing a new model for AI-powered healthcare member experience | Sierra](/content/blog/sierra-and-stellarus/index.html): Sierra is partnering with Stellarus to help health plans like Blue Shield of California deploy AI agents. (560 words, Jan 12, 2026)
- [Building in France | Sierra](/content/blog/building-in-france/index.html): Sierra is expanding to France, where we'll help leading companies—from luxury houses to aerospace innovators—deliver exceptional customer experiences with AI. (263 words, Dec 15, 2025)
- [Aspiring to omotenashi: Sierra launches in Japan | Sierra](/content/blog/sierra-in-japan/index.html): We're excited to share that we're opening a Tokyo office, and SoftBank Vision Fund 2 has invested in Sierra. (331 words, Dec 4, 2025)
- [Sierra hits $100M ARR milestone in 7 quarters | Sierra](/content/blog/100m-arr/index.html): Sierra just hit $100M in ARR — seven quarters after we launched in February 2024. That’s a heck of a lot quicker than we expected, and makes Sierra one of the fastest-growing enterprise software companies in history. (574 words, Nov 21, 2025)
- [Change agents: Safelite | Sierra](/content/blog/ai-agents-in-action-safelite/index.html): How Safelite is transforming auto glass services for customers and insurance partners. (531 words, Nov 18, 2025)
- [Sierra Agent OS 2.0: from answers to memory and action | Sierra](/content/blog/agent-os-2-0/index.html): 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. (1,227 words, Nov 5, 2025)
- [Agent Studio 2.0: from technology to product  | Sierra](/content/blog/agent-studio-2-0/index.html): With Agent Studio 2.0, Sierra unlocks the full power of code for every team. New capabilities like Journeys, Workspaces, and the Integration Library make building advanced, deeply integrated agents faster, easier, and more collaborative than ever. (637 words, Nov 5, 2025)
- [Meet Live Assist: AI superpowers for customer care teams | Sierra](/content/blog/live-assist/index.html): Give every customer care agent AI superpowers — with real-time guidance, instant answers, and seamless consistency across every interaction. (394 words, Nov 5, 2025)
- [Change agents: Funnel Leasing | Sierra](/content/blog/ai-agents-in-action-funnel-leasing/index.html): AI agents in action: Funnel Leasing (860 words, Nov 4, 2025)
- [Confidence in every conversation | Sierra](/content/blog/confidence-in-every-conversation/index.html): Sierra's supervisors and Monitors make powerful systems dependable — combining real-time correction with continuous evaluation so businesses can trust every conversation, everywhere. (599 words, Oct 29, 2025)
- [Change agents: Rocket Mortgage | Sierra](/content/blog/ai-agents-in-action-rocket-mortgage/index.html): AI agents in action: Rocket Mortgage (453 words, Oct 27, 2025)
- [Load testing: how Sierra scales for surges | Sierra](/content/blog/load-testing/index.html): 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. (754 words, Oct 7, 2025)
- [There's an agent for that, and it runs on Sierra  | Sierra](/content/blog/theres-an-agent-for-that-and-it-runs-on-sierra/index.html): Today, we’re announcing that we’ve raised $350M additional capital at a valuation of $10B, led by Greenoaks, which is doubling down on Sierra. (541 words, Sep 4, 2025)
- [Calling new grads: APX year 2 | Sierra](/content/blog/apx-year-2/index.html): Are you a college senior or recent graduate? If you’re driven to turn AI theory into practice, make an impact, and learn from some of the best in our industry, we’d love to build with you. (427 words, Sep 2, 2025)
- [A more reliable inference layer for foundation models | Sierra](/content/blog/a-more-reliable-inference-layer-for-foundation-models.html): A more reliable inference layer for foundation models (884 words, Jun 26, 2025)
- [The challenge with rolling your own agent | Sierra](/content/blog/the-challenge-with-rolling-your-own-agent/index.html): Short “time to demo” masks the challenge of building agents that can reliably take action without supervision, safely represent a brand, and operate at the scale needed to handle millions of customer interactions a year.  (553 words, Jun 17, 2025)
- [Five ways to use AI agents: healthcare  | Sierra](/content/blog/five-ways-to-use-ai-agents-healthcare/index.html): Here are five ways Sierra agents can already make an impact in healthcare. (850 words, Jun 16, 2025)
- [𝜏²-bench | Sierra](/content/blog/benchmarking-agents-in-collaborative-real-world-scenarios.html): Benchmarking agents in collaborative real-world scenarios (1,220 words, Jun 10, 2025)
- [Five ways to use AI agents: financial services | Sierra](/content/blog/five-ways-to-use-ai-agents-financial-services/index.html): Five ways to use AI agents: financial services (726 words, Apr 8, 2025)
- [What is an AI agent? | Sierra](/content/blog/what-is-an-ai-agent-why-does-my-business-need-one/index.html): What is an AI agent? (570 words, Apr 1, 2025)
- [Same Platform, Different Personalities. | Sierra](/content/blog/same-platform-different-personalities/index.html): Your AI agent is an extension of your brand’s voice, values, and customer experience. As Harmony, Duncan Smuthers, and Barbra all show, Sierra can help your business build better, more human customer experiences with AI. (554 words, Mar 20, 2025)
- [𝜏-bench | Sierra](/content/blog/tau-bench-shaping-development-evaluation-agents/index.html): We explore how Sierra’s 𝜏-bench is shaping the development and evaluation of agents. (1,485 words, Mar 18, 2025)
- [Outcome-based pricing for AI Agents | Sierra](/content/blog/outcome-based-pricing-for-ai-agents/index.html): Outcome-based pricing for AI Agents (867 words, Dec 10, 2024)
- [Outcome-based pricing for AI Agents | Sierra](/content/uk/blog/outcome-based-pricing-for-ai-agents/index.html): Outcome-based pricing for AI Agents (881 words, Dec 10, 2024)
- [Meet the AI agent engineer | Sierra](/content/blog/meet-the-ai-agent-engineer/index.html): 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. (1,782 words, Jul 11, 2024)
- [𝜏-Bench: Benchmarking AI agents for the real-world | Sierra](/content/es/blog/benchmarking-ai-agents/index.html): 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. Read on for a synopsis of our inaugural publication. (1,592 words, Jun 20, 2024)
- [Meet Sierra, the conversational AI platform for businesses | Sierra](/content/blog/introducing-sierra/index.html): Sierra is the conversational AI platform for businesses, enabling every company to create always-on, delightful, conversational customer experiences for everything from support to retail, recommendations, subscription management, and more. (1,102 words, Feb 13, 2024)

## Products

- [Channels | Sierra](/content/product/channels/index.html): Create consistent experiences across voice, chat, email, and more in 58 languages, available 24/7/365. (617 words)

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