Sierra

What Sierra does

Sierra is an enterprise AI platform that builds, deploys, and operates conversational AI agents for customer experience. Founded in February 2024 in San Francisco by Bret Taylor (former Salesforce Co-CEO and current OpenAI Chairman) and Clay Bavor (former Google Labs lead), the company serves more than 40% of the Fortune 50 across financial services, healthcare, telecommunications, media and entertainment, retail, technology/SaaS, travel, and federal sectors. Named customers include Rocket Mortgage, SoFi, Chime, Brex, SiriusXM, ADT, Sonos, Wayfair, Vanguard, Next, Singtel, R1 RCM, Sutter Health, GoFundMe, DocuSign, CLEAR, Ramp, and Redfin.

The core product is Sierra Agent OS, a platform-plus-modules architecture that combines a 'constellation' of frontier, open-weight, and proprietary LLMs with purpose-built components: the Linnaeus and Darwin search models for retrieval and reranking over conversation transcripts, Supervisor Models for hallucination and abuse mitigation, the Agent Data Platform for memory and next-best-action decisioning, Ghostwriter (an agent-building agent that produces production-ready multilingual agents from SOPs or plain English), Agent Studio (no-code authoring), Explorer (agent optimization), Insights (analytics), and Channels for omnichannel deployment across voice, chat, email, SMS, WhatsApp, Apple Business Chat, and ChatGPT (via Model Context Protocol). The platform is delivered with an extensive compliance posture including FedRAMP High, PCI DSS Level 1, HIPAA, SOC 2 Type II, ISO 27001, and ISO 42001.

Sierra monetizes via outcome-based enterprise contracts (clients pay for successful resolutions rather than seats), with Year-1 all-in budgets typically in the $200K–$350K+ range and implementation fees of $50K–$200K. The go-to-market is direct enterprise field sales supplemented by system-integrator partnerships (ibex, Fiserv, Kraken Technologies, Knox Systems). Distribution is global: U.S. headquarters in San Francisco (~300,000 sq ft leased), with international operations established via acquisitions of Opera Tech (Tokyo, March 2026), Receptive AI (voice, March 2026), and Fragment (Paris, April 2026). As of February 2026, Sierra had reached $150M in ARR within eight quarters of launch, was valued at $15.8B following a $950M Series E in May 2026, and had raised over $1.5B in total funding.

Name

Sierra

Legal name

Sierra Technologies, Inc.

Website

https://sierra.ai

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Sierra is an enterprise AI platform that builds and deploys conversational AI agents for customer experience across voice, chat, email, and messaging. Founded in 2024, it serves over 40% of the Fortune 50 via outcome-based pricing and a constellation of proprietary and frontier LLMs.

Ownership category

akta.pro rank

Product category

Conversational AI Platform

NAICS

Software Publishers (5132), Software Publishers (51321), Computer Systems Design Services (541512)

SIC

Services-Prepackaged Software (7372), Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

AI Application Enablement Platforms (Copilot/Agent Frameworks, SDKs) (HDAEANAJ)

akta.pro secondary industries

AI Integration & Orchestration Platforms (Connectors, Workflow, iPaaS for AI) (HDAEANAI), iBPMS (Intelligent BPM Suites) & Process Automation Suites (HDAEAHAG), End-to-End Enterprise AI Platforms (MLOps & Model Lifecycle Management) (HDAEANAA)

Keywords

• Conversational AI platform
• Enterprise AI agents
• Customer experience automation
• AI agent OS
• Omnichannel customer support

Headquarters

HQ city

San Francisco

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Outcome-Based Pricing: Sierra pioneered outcome-based pricing where customers pay only when the software achieves specific, valuable outcomes. This aligns vendor and customer interests and creates strong switching costs once deployed.
2. Enterprise Subscription Contracts: Custom enterprise contracts typically starting around $150,000 annually, with additional implementation fees. Year 1 all-in budgets typically range from $200,000 to $350,000 or more once onboarding, integration, and rollout work are included. Conversation volume, integration complexity, and workflow automation scope drive total spend.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

Sierra provides an enterprise AI agent platform, branded Sierra Agent OS, that enables businesses to build, deploy, and optimize conversational AI agents capable of autonomously handling customer interactions across chat, voice, email, SMS, WhatsApp, and ChatGPT. The platform includes Ghostwriter (agent-building agent), Agent Studio (no-code management), Agent Data Platform (personalization and memory), Insights (analytics), Explorer (optimization), and Channels (multichannel deployment), supported by deep integrations with systems of record and enterprise-grade compliance certifications.

Product overview

Sierra is an enterprise AI customer experience platform offering a unified platform-plus-modules architecture. The core is Sierra Agent OS, which powers the entire product suite. Key modules include Ghostwriter (agent-building agent for creating agents from plain English or documents), Agent Studio (no-code agent management), Agent Data Platform (memory, recommendations, and proactive engagement), Insights (analytics and reporting), Explorer (agent optimization via conversation analysis), Channels (multi-channel deployment across voice, chat, email, SMS, WhatsApp, ChatGPT), and Trust and Reliability infrastructure. The platform enables businesses to build AI agents that autonomously handle customer interactions across financial services, healthcare, telecommunications, media, travel, and retail industries.

Differentiator

Problem solved

Functional benefit

Brands

• Ghostwriter: Agent-as-a-service tool that creates and deploys specialized AI agents using natural language descriptions
• Explorer
• Agent Studio
• Agent Data Platform
• Insights
• Channels
• Agent OS

Products and services

• Sierra Agent OS The core platform infrastructure for building, optimizing, personalizing, and scaling AI agents. Provides the operating system layer that enables all other product modules to function together for enterprise customers.
• Ghostwriter The agent-building agent that creates and optimizes other AI agents. Allows users to build agents by uploading SOPs, transcripts, whiteboard photos, and audio recordings, or by describing goals in plain English.
• Agent Studio No-code platform for customer experience teams to build and manage agents. Set up customer journeys, configure knowledge, define brand guidelines, and manage integrations without writing code.
• Agent Data Platform Transforms conversations into relationships with memory, recommendations, and proactive engagement. Includes conversational memory, customer data integration, personalized interactions, intelligent decisioning, audience targeting, and omnichannel proactive outreach.
• Insights Analytics and reporting platform for evaluating and optimizing agent performance. Includes key metrics tracking, one-click investigation, automated tagging, experimentation capabilities, observability, monitoring, auditing, and alerting.
• Explorer Agent-optimizing agent that analyzes customer conversations to identify performance issues and provide improvement recommendations. Features proactive briefings, ChatGPT-style deep research for conversations, and one-click handoff to Ghostwriter.
• Channels Multi-channel deployment capabilities enabling consistent experiences across voice, chat, email, SMS, WhatsApp, Apple Business Chat, and ChatGPT in 58 languages. Voice includes inbound/outbound calls, low-latency interactions, accent handling, and sentiment detection.
• Trust and Reliability Security and compliance infrastructure including secure integration, complete compliance certifications (SOC 2, HIPAA, GDPR, PCI DSS Level 1, FedRAMP High, CCPA, CSA STAR, ISO 27001, ISO 42001), supervisor models, data governance, and PII masking.
• Agent SDK Software development kit enabling developers to write customer journeys as code, track changes, and build sophisticated logic. Provides engineering control and version control for building and maintaining AI agents.

Quantifiable outcome

• Clients using Rocket Mortgage's Digital Assistant close at rates 3x higher than those who don't
• +10 more outcomes

Named customers22 records

Segments7 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

AI capability10 records

Feature8 records

Partnerships

Ten partnerships are on record, tiered core.

• Kraken TechnologiescoreStrategic or Co-development Partner · 11 June 2026Partnership to launch Autonomous Agents - utility-specific AI agents for customer service. Agents deployed at enterprise scale covering 1.3 million customer accounts at a major energy utility within four weeks of launch. Combines Sierra's AI customer experience platform with Kraken's utility operating system and data model.
• Knox SystemscoreTechnology or Integration · 10 June 2026FedRAMP High Certification achieved in partnership with Knox Systems, the largest federal AI-managed cloud provider. Enables U.S. government agencies to deploy AI-powered customer service solutions including Medicare navigation and tax filing through Knox Systems' managed federal cloud.
• OpenAIcoreTechnology or Integration · 14 May 2026Leverages OpenAI's GPT-Realtime-2 voice AI model featuring real-time translation, streaming speech-to-text, and 128K context window. Sierra featured as customer spotlight building AI agents for Fortune 100 enterprise clients using this technology.
• FiservcoreTechnology or Integration · 6 May 2026Co-creation of AI agents with six banks and OpenAI on agentOS, an agentic AI operating system for banking. Enables banks to deploy AI agents for core banking and payments operations with bank-grade controls.
• ibexcoreStrategic or Co-development Partner · 5 May 2026Strategic partnership to deliver AI-powered customer experience solutions at scale. Combines Sierra's conversational AI platform with ibex's CX expertise and integration capabilities. Enables deployment of end-to-end AI solutions for global brands in weeks rather than months. Already deployed with Philippine Airlines for AI voice agent.
• FragmentcoreStrategic or Co-development Partner · 23 April 2026Acquired Y Combinator-backed French startup specializing in AI workflow integration. Brings multilingual capabilities and engineering team developing context-switching technology across languages. Co-founders Olivier Moindrot and Guillaume Genthial joining Sierra.
• RedfincoreTechnology or Integration · 4 April 2026Partnership to develop AI-powered conversational search for homebuyers. First-of-its-kind conversational home search where the conversation is the interface, replacing traditional filter-based search. Users viewing nearly 2x as many listings and 47% more likely to request a tour.
• Receptive AIcoreTechnology or Integration · 27 March 2026Acquired voice agent company to enhance voice AI capabilities, part of three acquisitions announced in late March 2026.
• SingtelcoreStrategic or Co-development Partner · 4 March 2026Strategic partnership to deploy agentic AI across Singtel's customer engagement channels. AI assistant 'Shirley' launched for Singtel Singapore customer care, handling over 70,000 cases in first six weeks. 73% of mobile/home troubleshooting cases and 76% of roaming sign-up requests resolved without human intervention. Singtel plans to extend capabilities across other departments and enterprise clients.
• Opera TechcoreStrategic or Co-development Partner · 4 March 2026Acquired Tokyo-based enterprise AI startup to expand presence in Japan's demanding enterprise software market. Opera Tech's local relationships and experience supporting leading Japanese enterprises align with Sierra's strategic focus.

Scale indicators8 records

Recent moves9 records

Expansion highlights8 records

Direct peers

• Decagon: AI agent platform purpose-built for enterprise customer experience, using LLMs and proprietary reasoning models to automate support across channels. Closest direct competitor to Sierra with overlapping Fortune 500 customer targets.
• Forethought: Conversational AI platform for customer support that uses LLMs to deflect tickets, triage, and assist agents. Competes head-to-head with Sierra in mid-market and enterprise CX automation.
• Ada: AI-powered customer service automation platform serving enterprise brands with branded, no-code AI agents across chat and email. Directly comparable agent-building product to Sierra's Agent Studio.
• Yellow.ai: Enterprise conversational AI platform offering voice and chat agents for customer service and employee experience. Competes with Sierra across verticals and geographies, with stronger APAC presence.
• PolyAI: Voice-first AI agent platform for enterprise customer service, focused on phone-based conversational experiences. Closely comparable to Sierra's voice modality and PCI-enabled voice deployments.
• Kore.ai: Enterprise conversational AI and agent platform with both customer-experience and employee-experience offerings. Comparable to Sierra's Agent OS across channels and integrations.
• Aisera: AI agent platform for customer service, IT support, and HR, with autonomous workflow capabilities. Overlaps with Sierra in enterprise support automation and agentic AI use cases.

Broad incumbents

• Salesforce (Agentforce / Einstein): Largest CRM incumbent with Agentforce / Einstein conversational AI agents native to the Salesforce platform. Competes with Sierra by bundling agent capabilities into existing CRM contracts at massive scale.
• Microsoft (Copilot Studio / Dynamics Customer Service): Hyperscaler offering Copilot Studio for building conversational AI agents, integrated with Dynamics 365 Customer Service and the broader Microsoft Cloud. Bundles AI agents into existing enterprise agreements.
• Google Cloud (Contact Center AI / Vertex AI Agents): Google's enterprise contact-center and agent-building products on Vertex AI, with native Dialogflow lineage. Competes with Sierra via cloud bundling and Gemini-powered CX offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sierra
• Xx.com/sierraplatform

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries3 records

Funding overview

Funding rounds5 records

Investors11 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A4 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sierra