Sierra - AI agent platform for enterprise customer experience

What Is Sierra? Your AI Agent Platform for Enterprise Customer Experience

If you've ever felt frustrated waiting for customer support, you're not alone. Traditional customer service teams struggle with rising costs, slow response times, and the impossible task of providing 24/7 availability across every channel. On top of that, delivering truly personalized experiences feels like a distant dream when your agents are drowning in repetitive inquiries.

Sierra is an AI Agent platform built specifically for enterprises that want to transform their customer experience without rebuilding everything from scratch. Founded by Bret Taylor (former Salesforce Co-CEO and OpenAI board member) and Clay Bavor (former Google Labs head), Sierra has already helped over 50 major companies—including Rocket Mortgage, SoFi, Brex, Redfin, and Chime—reimagine how they connect with customers.

What makes Sierra different? First, you can build AI Agents without writing code through Agent Studio, which means your customer experience team can iterate quickly without waiting for engineering resources. Second, Sierra's Constellation architecture combines multiple AI models to ensure reliability—your agents stay operational even when individual providers have issues. Third, you can deploy across every channel your customers use: chat, SMS, WhatsApp, email, voice, and even ChatGPT.

The results speak for themselves. Rocket Mortgage saw conversion rates jump 4x. SoFi improved NPS by 33 points. Casper achieved over 20% higher CSAT while maintaining 74% resolution rates. In under two years, Sierra reached $100M in annual recurring revenue—a rare feat in enterprise software.

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Sierra's Core Features: What You Can Actually Use

Every feature in Sierra exists to solve a real business problem. Here's how each one helps your team.

Agent Studio: Build AI Agents Without Code

You don't need to be a developer to create powerful AI Agents. Agent Studio gives your customer experience team a visual interface where they can configure customer journeys, connect knowledge bases, and apply brand guidelines—all through point-and-click controls. Next went live in just 6 weeks using Agent Studio, with their team owning the build without engineering bottlenecks.

Agent SDK: Deep Customization for Engineering Teams

When your developers need more control, Agent SDK provides a declarative framework for defining Agent objectives and security guardrails. It supports CI/CD workflows, multi-Agent orchestration, composable skills, and fine-tuning capabilities. Think of it as the bridge between what business users build in Agent Studio and the sophisticated logic your engineering team needs.

Constellation of Models: Reliability Through Diversity

Sierra doesn't rely on a single AI model. The Constellation architecture combines frontier models, open-source models, and Sierra's proprietary models—then automatically switches between LLM providers to optimize performance and maintain service continuity. If one model provider experiences downtime, your Agents keep working seamlessly.

Supervisor Models: Built-In Safety and Compliance

Financial services and healthcare companies have strict regulatory requirements. Sierra's Supervisor Models act as a safety layer that reduces hallucinations, ensures security compliance, and prevents abuse. These supervised models automatically flag sensitive topics, encrypt PII, and keep your company away from liability—critical for industries like banking and healthcare.

Voice: AI-Powered Phone Support

Phone support remains essential for many businesses, but staffing call centers 24/7 is expensive. Sierra Voice enables AI-powered inbound and outbound phone conversations that feel natural and reinforce your brand. Customers get instant answers without waiting in queue, while your team focuses on complex issues that need human judgment.

Live Assist: Supercharging Your Human Agents

AI doesn't replace your best people—it makes them better. Live Assist provides real-time guidance to your human agents, including suggested responses, auto-drafted replies, and one-click actions. Multiple clients have seen significant CSAT improvements when their human agents work alongside Sierra's AI assistance.

Agent Data Platform: Personalization at Scale

Here's where many AI customer service tools fall short: they don't know your customer. Agent Data Platform fixes this by unifying customer data from all your systems—CRM, support tickets, purchase history—into a single view. Your Agents remember past interactions, personalize every conversation, and can even proactively reach out based on real-world signals. Madison Reed used this capability to cut subscription cancellations by 50%.

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Who Uses Sierra? Real Companies, Real Industries

Sierra serves enterprises across multiple industries, each with unique customer experience challenges. Here's where different sectors are finding success.

Financial Services

Banks and fintech companies face intense regulatory scrutiny while serving customers who expect instant answers. SoFi improved NPS by 33 points using Sierra. Chime achieved over 70% resolution rates. Ramp reached 90% case resolution. These results matter in an industry where trust and speed directly impact customer acquisition and retention.

Real Estate Technology

Real estate transactions involve complex, high-stakes conversations. Redfin deployed Sierra to help home buyers get answers instantly—resulting in 2x more property views. The ability to handle nuanced questions about listings, mortgages, and negotiations while maintaining compliance made Sierra a natural fit.

Retail and E-Commerce

Online retailers need to convert browsers into buyers while managing returns and support inquiries. Casper achieved 24/7 availability with over 20% CSAT improvement and 74% resolution rates. Minted reached 65%+ resolution with 95% CSAT. Both companies handle complex product customization and order management that require accurate, contextual responses.

Health and Wellness

Healthcare-adjacent companies must balance personalization with privacy. WeightWatchers achieved CSAT of 4.6 with approximately 70% resolution rates. The platform's HIPAA compliance and built-in data protection make it suitable for companies handling sensitive health information.

Subscription and Membership

Reducing churn is priority number one for subscription businesses. Madison Reed used Agent Data Platform's personalization and proactive engagement capabilities to cut subscription cancellations by 50%. When your Agent knows each customer's history and preferences, retention improves naturally.

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Technical Architecture and Security: Enterprise-Grade Foundations

When you're trusting an AI platform with your customer conversations, you need to know the technology actually works—and keeps data safe.

Multi-Model Constellation Architecture

Sierra's Constellation approach isn't just marketing language. The system automatically routes requests across multiple AI models based on complexity, cost, and performance requirements. If OpenAI experiences capacity issues, Anthropic models handle the load. If a specific model excels at a particular task type, Sierra routes there automatically. This isn't theoretical—it's why clients like Singtel achieved production deployment in under 10 weeks with confidence the system would perform reliably at scale.

Supervisor Models: The Safety Layer

Every AI system can hallucinate or generate inappropriate responses. Sierra addresses this through Supervisor Models—a dedicated layer that reviews and validates Agent outputs before they reach customers. These supervisors enforce your company's policies, filter sensitive topics, and ensure responses are accurate. For financial services clients, this means regulatory compliance. For healthcare, it means patient safety. For all enterprises, it means brand protection.

Security Certifications: More Than Checkboxes

Sierra has earned the security certifications enterprises actually need: SOC 2, ISO 27001, ISO 42001 (AI-specific), HIPAA, GDPR, CCPA, CSA STAR, and EU AI Act compliance. These aren't just badges—they reflect actual security practices. The Trust Center at trust.sierra.ai provides detailed documentation you can review before signing any contract.

Data Governance: Your Data Stays Yours

This matters more than most companies explain well. Sierra never uses your customer data to train models shared with other clients. Data is encrypted at rest and in transit. PII gets automatically masked. Your company controls exactly how data is used through configuration, not fine print. When SoFi and Chime trust Sierra with their banking customers, this data isolation is non-negotiable—and Sierra delivers it.

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Real User Reviews: What Enterprise Customers Say

Numbers tell part of the story. Here's what actual customers say in their own words.

Rocket Mortgage saw conversion rates increase 4x—a massive impact on their business pipeline. When home buyers get instant, accurate answers about mortgages, they move faster through the funnel.

SoFi improved NPS by 33 points, a extraordinary gain in financial services where trust drives every decision. That kind of metric shift doesn't happen without genuinely better customer experiences.

Guild achieves 4.8/5 CSAT scores, reflecting how well AI Agents can handle education and membership support when properly configured.

CLEAR maintains 4.7/5 customer satisfaction, proving AI works even in security-sensitive environments like identity verification.

Thrive Market approaches 90% CSAT, demonstrating how AI support scales for membership-based e-commerce without sacrificing quality.

WeightWatchers balances 4.6 CSAT with approximately 70% resolution rates—meaning most members get their issues solved without ever needing human intervention.

The common thread across these companies: they didn't just deploy AI and hope for the best. They invested in proper configuration, knowledge base development, and continuous optimization through Sierra's Insights tools. The platform enables these results, but customer success requires partnership.

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Frequently Asked Questions

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Pricing and Getting Started

Sierra's pricing philosophy is simple: we succeed when you succeed. Rather than charging per message or per minute—metrics that don't always correlate with business outcomes—Sierra uses outcome-based pricing. This means fees are tied to the results that actually matter to your business: conversion rates, resolution rates, NPS improvement, or whatever metrics define success for your organization.

This approach creates genuine partnership. When your AI Agents perform better, Sierra benefits. When you achieve ROI through improved customer experience, we share in that value. It's a model that keeps everyone focused on what matters: real business results.

Because pricing depends on your specific situation—volume, channels, integration complexity, and success metrics—Sierra doesn't publish rates on their website. The best way to understand costs is to talk with their team directly. You'll get a custom proposal aligned with your goals.

Ready to explore how Sierra could transform your customer experience?

Visit https://sierra.ai to learn more, or reach out to their sales team for a personalized conversation. With over 50 enterprise deployments and proven results across financial services, real estate, retail, and health industries, Sierra has the experience to help you succeed.