For Sierra, from 🤫 hussh
The business agent your Agent One talks to.
Bret Taylor and Clay Bavor built Sierra so every brand can own its customer experience through an AI agent. We are building the other side: an agent every person owns. When a person's 🤫 Agent One handles a return, a claim or a subscription change with a Sierra-powered brand agent, it is two agents, two owners, one consented transaction, and one receipt on each side. The brand keeps its relationship. The person keeps control.
The brand's agent, meeting the person's agent.
You build the brand's agent: one that owns the customer experience and takes real action.
🤫 builds the person's agent: their own, consent-first, running on hardware they own.
The defining agent-to-agent pattern: two agents, one consented transaction.
Your agents already process refunds, payments and subscription changes through CRM and ERP.
Agent One starts those on the person's behalf, by consent, with a PCHP receipt.
A higher-trust channel. Your brand's agent, reachable by your customers' own agents.
Each Sierra agent is the brand's own voice and source of truth.
A person's one Agent One reaches every brand's Sierra agent over open rails. No app for every brand.
One person's agent, every brand's agent. Discovery and reach, by consent.
Brand-owned agents that get things done.
Sierra, founded in 2023, is the platform brands use to build conversational AI agents that own the customer experience and deliver measurable results.
Up from about $130M at the end of 2025 and $26M at the end of 2024. Roughly 8x in 18 months.
Set by the May 2026 round. The market's appetite for AI agents, in one number.
One of the larger AI agent rounds to date.
Sierra's enterprise reach, with agents powering billions of customer interactions.
Voice passed text as the primary channel in October 2025. Agents people talk to.
Founded by Bret Taylor and Clay Bavor, out of stealth in February 2024.
Enterprise-grade agents that belong to the brand and take real action. The exact counterpart to a person's own agent.
Enterprise-grade customer experience
Built for high-stakes moments: refinancing, insurance claims, returns, subscription changes.
The Agent platform
Agent Studio, the Agent Data Platform, Ghostwriter, Insights and every channel, voice included. A complete stack for building agents.
The brand's own agent
Each agent carries the brand's voice, tone, guardrails and trust, true to Sierra's values of trust and craftsmanship.
Agents that act
Refunds, payments and subscription updates through CRM and ERP. Beyond answers, to real transactions.
The founders
Bret Taylor co-created Google Maps, was CTO of Facebook, co-CEO of Salesforce and chairs OpenAI's board. Clay Bavor spent 18 years at Google.
Outcome-based pricing
Pay per successful resolution. Price tied to real value, a natural fit for agent-to-agent settlement.
Where Sierra is going.
Agentic customer experience
Brand-owned agents that carry the customer relationship from start to finish.
Voice
The most human interface for a brand's agent.
Enterprise scale
Deeper Fortune 500 adoption, with agents completing real transactions.
Measurable outcomes
Agents judged by resolution quality and reliability, not conversation volume.
Trust and craft
Sierra's own values, and the bar of taste and craft 🤫 holds too.
The Agent platform, voice, and enterprise scale.
The newest from Sierra, and where a person's agent fits in.
The Agent platform
Agent Studio and the Agent Data Platform. Agentic customer experience is the whole company, now funded by the May 2026 raise.
Voice first
Voice became the leading channel in October 2025. Brand agents people talk to, a natural match for a person's own voice agent.
Enterprise adoption
About 40% of the Fortune 50, with customers across retail, travel, media and fintech. Agents at real scale.
τ-bench
Sierra published tau-bench, a benchmark for how reliably agents complete real, multi-step tasks. Reliability as a first-class measure.
Buy together. Build together. Sell together. Take risk together.
Sierra builds the brand's agent. 🤫 builds the person's agent. Each is owned by the one it serves, and together they make agent-to-agent commerce real.
Build together: the agent-to-agent bridge
Sierra agents handle returns, claims and subscription changes through CRM and ERP.
A person's 🤫 Agent One works directly with a Sierra brand agent over open rails, MCP, A2A, AP2 and UCP, with consent and a receipt for every authorized action.
Two agents, two owners, one consented transaction.
Sell together: a higher-trust channel
Sierra serves about 40% of the Fortune 50.
For brands: your Sierra agent, now reachable by your customers' own agents. For people: one agent that speaks to every brand's Sierra agent.
A higher-trust, consent-verified connection for brand and customer alike.
Buy together: the brand's own interface
Where a brand runs Sierra, that agent is the source of truth.
Agent One uses the brand's Sierra agent as the front door. No scraping, no fragile automation.
A consent-first path, verified at the source.
Take risk together: outcome settlement
Sierra prices on successful resolution.
A pilot where Agent One starts a resolution, Sierra's agent delivers it, and the outcome is confirmed and receipted on both sides.
Pay per resolution, extended to agent-to-agent and settled by consent.
The people building Sierra.
Bret Taylor
Co-founder and CEO
Leads the vision of agentic customer experience: brand-owned agents that carry the relationship. He also chairs OpenAI's board.
Clay Bavor
Co-founder
Leads product and design, after 18 years at Google across Labs, Starline, Lens and Workspace.
Two agents, one consented transaction.
This is how commerce will work: a person's own agent and a brand's own agent, transacting by consent, with a receipt on each side. Sierra powers the brand. 🤫 Agent One stands with the person, on their hardware, holding their receipt. Each agent answers to the one it serves. And 🤫 Agent One is free to every American.