Last updated 06-28-2026
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Sierra
Sierra is an enterprise platform for building conversational AI agents that handle real customer work across chat, voice, email, SMS, WhatsApp, and ChatGPT. Brands like Rocket Mortgage, SiriusXM, Wayfair, Vanguard, and SoFi use it to deliver personalized support without scaling headcount linearly. The goal is better customer experiences at lower cost, with agents that resolve issues end to end instead of deflecting to FAQ pages.
The product runs on Sierra Agent OS, a stack for building, testing, and operating customer-facing agents. Ghostwriter turns SOPs, call transcripts, whiteboard photos, or plain-English prompts into production-ready agents with guardrails. Agent Studio gives CX teams no-code tools for journeys, knowledge bases, and integrations, while Explorer and Insights add analytics and deep research over conversation data.
What sets Sierra apart is outcome-based pricing: you pay when the software delivers defined business results, not per seat or per message. Agents connect to CRMs, order management, and other systems of record to handle complex workflows like insurance claims, mortgage origination, and order returns. The platform supports 58+ languages and ships with SOC 2, ISO 27001, HIPAA, and FedRAMP certifications for regulated industries.
Sierra was co-founded by Bret Taylor (former Salesforce Co-CEO, Google Maps co-creator) and Clay Bavor (former Google Labs leader). It targets CX leaders, support operations teams, and enterprise brands in financial services, healthcare, telecom, retail, travel, and media.
One agent deployed across voice, chat, email, SMS, WhatsApp, and ChatGPT
Ghostwriter builds agents from SOPs, transcripts, or plain-English descriptions
58+ languages with seamless switching mid-conversation
40+ pre-built integrations for CRMs, knowledge bases, and contact centers
Outcome-based pricing tied to measurable business results
SOC 2, ISO 27001, HIPAA, GDPR, and FedRAMP compliance certifications
Live Assist surfaces grounded responses to human care representatives
Outcome-based pricing aligns cost with measurable business results instead of seat counts.
Ghostwriter lets CX teams build and iterate on agents without engineering sprints.
Single agent runs across voice, chat, email, SMS, WhatsApp, and ChatGPT with shared memory.
40% of the Fortune 50 reportedly partner with Sierra, with named logos across major industries.
Enterprise compliance coverage includes SOC 2, ISO 27001, HIPAA, GDPR, and FedRAMP.
No public pricing, free tier, or self-serve signup; requires a sales conversation to start.
Built for enterprise CX teams with complex integrations, not small businesses or solo users.
Advanced agent setup still benefits from Sierra's implementation and agent development support.
What is Sierra?
Sierra is an enterprise platform for building conversational AI agents that handle customer support across voice, chat, email, SMS, WhatsApp, and ChatGPT. It helps brands deliver personalized, on-brand customer experiences while connecting to systems of record for end-to-end task completion.
What channels does Sierra support?
Sierra supports voice, website chat, mobile app chat, WhatsApp, Apple Business Chat, SMS, email, Live Assist for human agents, and ChatGPT via MCP. A single agent can run across all channels with shared customer memory and consistent behavior.
What is Ghostwriter in Sierra?
Ghostwriter is Sierra's agent-building agent. It creates and updates customer-facing agents from SOPs, raw transcripts, audio interviews, or plain-English prompts, then auto-generates simulations and fixes failed tests before anything goes live.
How does Sierra pricing work?
Sierra uses outcome-based pricing, meaning customers pay when the software achieves specific, valuable outcomes rather than per seat or per message. Sierra does not publish plan tiers or dollar amounts on its website; prospects request access via the Learn more form.
Does Sierra have a free plan?
Sierra does not offer a public free tier or self-serve signup. Access starts through the Learn more contact form on sierra.ai. The platform is built for enterprise customer experience teams rather than individual users.
Who uses Sierra?
Sierra reports that 40% of the Fortune 50 partner with the platform. Named customers include Rocket Mortgage, SiriusXM, Wayfair, Vanguard, SoFi, Gap Inc., Singtel, SoftBank, Discord, Brex, Ramp, and Sutter Health.
What industries does Sierra serve?
Sierra serves financial services, healthcare, telecommunications, media, travel and hospitality, retail and consumer goods, and technology. Its site highlights use cases like mortgage origination, insurance claims, order returns, and appointment scheduling.