Sierra

aid: sierra-ai
name: Sierra
description: Sierra is a conversational AI platform for customer experience, founded in 2023 by Bret Taylor (former co-CEO
  of Salesforce, CTO of Facebook, co-creator of Google Maps, and current chair of OpenAI's board) and Clay Bavor (former Google
  VP who led Labs, Project Starline, Google Lens, and Google Workspace). Headquartered in New York with offices in San Francisco,
  Atlanta, London, Paris, Madrid, Toronto, Singapore, and Tokyo, Sierra builds branded AI agents that handle customer service,
  sales, and operational interactions across chat, voice, SMS, WhatsApp, email, and ChatGPT for enterprises including SiriusXM,
  WeightWatchers, Sonos, ADT, Chime, Sutter Health, Rocket Mortgage, Ramp, Brex, SoFi, Casper, CLEAR, Vivid Seats, Wayfair,
  AOL, and approximately 40% of the Fortune 50. The platform is anchored by Agent OS 2.0, with Agent Studio (no-code builder
  for CX teams), Agent SDK (a developer-facing programmatic layer that lets engineering teams write customer journeys as code),
  Agent Data Platform (persistent cross-session memory unifying structured CRM data and unstructured conversation history),
  Insights (analytics — Explorer, Monitors, Experiments, Observability), Live Assist (human-in-the-loop), Voice (real-time
  voice agents), and Ghostwriter (an agent-building agent that generates production-ready multilingual agents from SOPs, transcripts,
  audio recordings, whiteboard photos, or plain English in 30+ languages). Sierra runs an outcome-based pricing model — customers
  pay per resolved case, not per seat or per token — and operates a gated developer documentation portal at docs.sierra.ai
  available only to contracted customers. There is no public REST API, no public Agent SDK package, no public GitHub org,
  and no self-serve sign-up; access is via enterprise sales. Sierra raised $950M at a $15.8B valuation in May 2026 (after
  a $350M round at $10B earlier in the year) and reported $150M ARR within roughly two years of public launch. Sierra also
  acquired the French agent-evaluation startup Fragment in April 2026 and publishes the public τ-bench, τ-voice, and τ-knowledge
  benchmarks for evaluating agentic systems.
type: Index
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sierra-ai.png
tags:
- AI
- Artificial Intelligence
- Conversational AI
- Customer Experience
- Customer Service
- Agents
- AI Agents
- Voice
- Contact Center
- Enterprise
- Outcome-Based Pricing
- Agent OS
- Agent SDK
- Ghostwriter
- Bret Taylor
url: https://raw.githubusercontent.com/api-evangelist/sierra-ai/refs/heads/main/apis.yml
created: '2026-05-24'
modified: '2026-05-24'
specificationVersion: '0.20'
apis: []
common:
- type: TrustCenter
  url: security/sierra-ai-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/sierra-ai-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/sierra-ai-domain-security.yml
- type: Website
  url: https://sierra.ai
- type: Portal
  url: https://sierra.ai
- type: Documentation
  url: https://docs.sierra.ai
- type: Pricing
  url: https://sierra.ai/pricing
- type: Customers
  url: https://sierra.ai/customers
- type: Blog
  url: https://sierra.ai/blog
- type: Resources
  url: https://sierra.ai/resources
- type: Careers
  url: https://sierra.ai/careers
- type: Contact
  url: https://sierra.ai/contact
- type: TrustCenter
  url: https://trust.sierra.ai
- type: Events
  url: https://sierra.ai/summit
- type: LinkedIn
  url: https://www.linkedin.com/company/sierra-ai
- type: X
  url: https://twitter.com/sierraplatform
- type: Features
  data:
  - name: Agent OS 2.0
    description: Multi-channel agent operating system spanning chat, voice, email, SMS, WhatsApp, ChatGPT, and contact-center
      integrations with shared memory, learning, and live human assist.
  - name: Agent Studio
    description: No-code builder for CX teams to design agents using natural-language instructions and a collaborative workspace
      with simulations and guardrails.
  - name: Agent SDK
    description: Developer-facing programmatic layer that lets engineering teams write customer journeys as code, version
      them in their existing source control, and orchestrate composable skills and multi-step workflows.
  - name: Agent Data Platform
    description: Persistent agent memory unifying structured customer data (CRM, billing) with unstructured conversation history
      to enable personalized, relationship-aware responses across sessions.
  - name: Insights
    description: Analytics suite — Explorer (deep-research style conversation analysis), Monitors, Experiments, and Observability
      — for measuring and improving agent performance.
  - name: Live Assist
    description: Human-in-the-loop interface that surfaces real-time answers and captures conversation details to augment
      human agents.
  - name: Voice
    description: Real-time voice agents benchmarked publicly via Sierra's τ-voice benchmark; deployable into contact centers
      and IVR replacements.
  - name: Ghostwriter
    description: Agent-building agent that ingests SOPs, support transcripts, whiteboard photos, audio recordings, and plain-English
      descriptions to generate production-ready agents across voice, chat, and email in 30+ languages.
  - name: Trust and Reliability
    description: Built-in guardrails, evaluations, simulations, and observability targeted at regulated industries (financial
      services, healthcare, telecom).
  - name: Outcome-Based Pricing
    description: Customers pay per resolved case (outcome) rather than per seat or per token, aligning Sierra's revenue with
      measurable customer outcomes.
- type: UseCases
  data:
  - name: Customer Service Automation
    description: Branded AI agents handle Tier-1 support across chat, voice, SMS, and email — Chime, Ramp, Wilson, and Pendulum
      report case resolution rates of 70–90%.
  - name: Voice / IVR Replacement
    description: Real-time voice agents replace traditional IVR menus for providers such as R1 RCM, Singtel, and ADT, which
      handles ~2M monthly inquiries.
  - name: Sales and Conversion
    description: Conversational agents drive product discovery and conversion (Rocket Mortgage 4× conversion, Sun & Ski 3×
      conversion, Redfin 2× listing views).
  - name: Healthcare Member Support
    description: HIPAA-compliant agents for chronic care management, member enrollment, and patient navigation (Sutter Health,
      Cigna, WeightWatchers).
  - name: Financial Services
    description: Agents for fintech onboarding, account servicing, and dispute resolution (SoFi +33 NPS, Chime 70%+ resolution,
      Brex 90% faster).
  - name: Retail and E-Commerce
    description: Order tracking, returns, sizing, and personalization across brands like Casper, Minted, ThirdLove, BARK,
      Chubbies, and Sonos.
  - name: Subscription and Media
    description: Subscriber retention and support for SiriusXM (34M subscribers), AOL, Tubi, and WeightWatchers.
  - name: Telecom
    description: Plan changes, troubleshooting, and billing for Singtel and Next.
  - name: Multi-Brand Agent Hosting
    description: Single agent runtime serving multiple brands under one customer (e.g., Imprint).
- type: Integrations
  data:
  - name: ChatGPT
    description: One-click publish of a Sierra agent into the ChatGPT app directory, extending brand reach inside OpenAI's
      consumer surface.
  - name: WhatsApp
    description: Native deployment of Sierra agents on the WhatsApp Business channel.
  - name: SMS
    description: Outbound and inbound SMS agent channels.
  - name: Email
    description: Email-as-a-channel for ticket-grade asynchronous interactions.
  - name: Contact Center Platforms
    description: Integrations into existing CCaaS deployments for live-assist and voice handoff.
  - name: CRM and Billing Systems
    description: Agent Data Platform ingests structured customer records from existing CRMs and billing engines.
  - name: Custom Backends
    description: Agent SDK lets teams call any internal or external system from within an agent workflow.
- type: Solutions
  data:
  - name: Financial Services
    description: Vertical solution for banks, fintechs, and lenders with compliance tooling and case templates.
  - name: Healthcare
    description: HIPAA-aligned deployments for payers, providers, and digital health.
  - name: Telecommunications
    description: Carrier-grade agents for plan changes, troubleshooting, and retention.
  - name: Media and Subscriptions
    description: Subscription lifecycle and content support.
  - name: Travel and Hospitality
    description: Booking, itinerary changes, and concierge experiences (Woodside Collection).
  - name: Retail
    description: Pre-purchase, post-purchase, and loyalty agents.
  - name: Technology
    description: Developer tools and SaaS support workflows.
- type: Compliance
  data:
  - name: SOC 2
    description: SOC 2 Type II audited.
  - name: ISO 27001
    description: ISO 27001 certified information security management.
  - name: ISO 42001
    description: ISO 42001 certified — the AI management system standard, signaling governed AI operations.
  - name: HIPAA
    description: HIPAA-compliant deployments for healthcare customers.
  - name: GDPR
    description: GDPR-compliant data handling for EU customers.
  - name: EU AI Act
    description: Aligned with EU AI Act obligations for high-risk AI systems.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com