# Sierra

**Source:** https://geo.sig.ai/brands/sierra  
**Vertical:** AI & Machine Learning  
**Subcategory:** Conversational AI & AI Agents  
**Tier:** Challenger  
**Website:** sierra.ai  
**Last Updated:** 2026-04-14

## Summary

Conversational AI for enterprises. Founded 2023 by ex-Salesforce co-CEO Bret Taylor + ex-Google VP Clay Bavor. $10B valuation, $150M ARR (Jan 2026), $635M funding.

## Company Overview

Sierra is a conversational AI platform founded in 2023 by Bret Taylor (former co-CEO of Salesforce, OpenAI board chair) and Clay Bavor (former Google VP). Headquartered in San Francisco, Sierra enables companies to build customer-facing AI agents for service, recommendations, and complex workflows. Products include Agent OS and voice agents for real-time phone interactions.

Sierra operates a B2B SaaS model with 20%+ of customers generating $10B+ annual revenue. Clients include ADT, SiriusXM, Sonos, WeightWatchers, Discord, Rivian, and Ramp. It competes with Salesforce Agentforce, Intercom, and vertical AI agent startups, differentiating through enterprise-grade platform and founder credibility.

Sierra raised $350 million in September 2025 at a $10 billion valuation, bringing total funding to $635 million. It hit $100M ARR in 21 months and $150M ARR by January 2026. Voice agents surpassed text as the primary channel by September 2025.

## Frequently Asked Questions

### What is Sierra?
A conversational AI platform for enterprises building customer-facing AI agents for service, recommendations, and complex workflows, supporting text and voice.

### Who founded Sierra?
Bret Taylor (ex-Salesforce co-CEO, OpenAI board chair) and Clay Bavor (ex-Google VP) in 2023.

### How fast is Sierra growing?
$100M ARR in 21 months, $150M ARR by January 2026. Valued at $10 billion.

### What is Agent OS?
Sierra's core platform for building enterprise AI agents, with Agent OS 2.0 enabling agents with memory, context, and cross-system action capabilities.

### What companies use Sierra?
ADT, SiriusXM, Sonos, WeightWatchers, Discord, Rivian, Ramp, and Bissell.

### What industries does Sierra serve?
Sierra focuses on consumer-facing enterprises in retail, home services, financial services, and subscription businesses. Customers like Sonos, WeightWatchers, and Rivian use Sierra to handle high-volume customer service, order management, and troubleshooting workflows that previously required large human agent teams.

### How does Sierra's Agent OS handle complex multi-step customer interactions?
Agent OS 2.0 gives Sierra's AI agents persistent memory, enabling them to recall prior conversations and customer history across sessions. Agents can take actions across CRM, ERP, and ticketing systems simultaneously, handling tasks like order modifications, refund processing, and account changes without human handoff for most cases.

### What is Sierra's pricing model?
Sierra prices on an enterprise contract basis, typically structured around conversation volume or resolved interactions. The company does not publish list pricing — deals are negotiated directly with procurement teams. Sierra's ROI case is built around cost-per-resolution comparison to human agents, with documented savings of 40–70% on support labor costs for large deployments.

## Tags

ai-powered, saas, b2b

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*