The business agent your Agent One talks to.
Worked backwards from Sierra's real business β the platform, built by Bret Taylor and Clay Bavor, that lets a brand own its customer experience through a conversational AI agent. This is the cleanest agent-to-agent fit in the market: Sierra builds the brand's agent; π€« builds the human's agent. When a person's π€« Agent One transacts with a Sierra-powered brand agent β a return, a claim, a subscription change β it is two agents, two owners, one consented transaction, and one tamper-evident receipt. Consent and control stay with the person.
Written from public information. A proposal in pursuit β no announced deal exists; Sierra is not a current partner, shareholder, or investor of ours.
Why Sierra Γ π€« is obvious β in one look.
You build the brand's agent β one that owns the customer experience and takes real backend actions.
π€« builds the human's agent β the person's own, consent-first, owner-operated agent.
The marquee agent-to-agent pattern: brand's agent and human's agent, one consented transaction.
Your agents already execute refunds, payments, and subscription changes via CRM/ERP.
Agent One initiates those on the person's behalf, by consent, with a PCHP receipt.
A consent-verified, higher-trust channel β your Sierra agent, now reachable by your customers' own agents.
Each Sierra agent is a brand's own source of truth for its customers.
A person's one Agent One reaches every brand's Sierra agent over open rails β no app-per-brand.
One human agent, every brand's agent β discovery and reach, consent-first.
How Sierra wins, honestly.
Sierra (founded 2023) is an AI platform for building conversational agents that own the customer experience and deliver measurable business impact. Figures below are public or from reputable trackers, flagged where estimated.
Up from ~$130M at end-2025 and ~$26M at end-2024 β roughly 8Γ in ~18 months (tracker estimate).
Set by the May 2026 round (reported) β the market's demand for AI agents, capitalized.
Led by top-tier investors (reported) β among the larger AI-agent rounds to date.
Sierra's stated enterprise reach β agents powering billions of customer interactions.
Voice surpassed text as the primary channel (Oct 2025) β agents people talk to, not just type at.
Founded by Bret Taylor and Clay Bavor; emerged from stealth in February 2024.
Brand-owned agents that actually do things.
Sierra's strengths are enterprise-grade, brand-owned agents that execute real actions. These are what an agent-to-agent partnership builds on.
Enterprise-grade CX agents
Built for regulated, high-stakes customer experience β refinancing, insurance claims, returns, subscription changes.
The Agent platform
Agent Studio, the Agent Data Platform, Ghostwriter, Insights, and multi-channel (including voice) β a full agent-building stack.
Brand-owned, not a generic bot
Each agent is the brand's own β voice, tone, guardrails, trust β reflecting Sierra's 'Trust' and 'Craftsmanship' values.
Agents that take action
Refunds, payments, subscription updates via CRM/ERP β beyond answer-only to transaction execution.
Founder pedigree
Bret Taylor (co-created Google Maps, Facebook CTO, Salesforce co-CEO, OpenAI board chair) and Clay Bavor (18-year Google veteran).
Outcome-based pricing
Pay per successful resolution β aligning price to real business value, a model that fits agent-to-agent settlement.
The Agent platform, voice, and enterprise scale.
What Sierra shipped most recently β the surfaces an agent-to-agent partnership plugs into. Stated honestly; dollar/lead-investor specifics are tracker-sourced.
The Agent platform
Agent Studio + the Agent Data Platform β the whole company thesis is agentic customer experience, capitalized by the May 2026 raise.
Voice-first
Voice became the leading channel (Oct 2025) β brand agents people talk to, a natural counterpart to a human's own voice agent.
Enterprise adoption
~40% of the Fortune 50, with named customers across retail, travel, media, and fintech β agents at real scale.
Ο-bench (agent evaluation)
Sierra published tau-bench, a benchmark for how reliably agents complete real, multi-step tasks β reliability treated as a first-class metric.
What Sierra is building toward.
Agentic customer experience
The whole company thesis β brand-owned agents that own the customer relationship end to end.
Voice
Voice as the leading channel β the most human interface for a brand's agent.
Enterprise scale
Deeper Fortune-500 adoption, with agents executing real transactions.
Measurable outcomes
Proving agents deliver real business impact β resolution quality and reliability, not just conversation volume.
Trust & craft
Sierra's stated values β the same taste-and-craft, trust-first bar π€« holds.
The people carrying it.
Our respectful reading of public roles and priorities β so any partnership makes each of their jobs easier, not harder.
Bret Taylor
Co-Founder & CEO
The agentic-customer-experience thesis β brand-owned agents that own the relationship. (Also chairs OpenAI's board.)
Clay Bavor
Co-Founder
Product and design β an 18-year Google veteran (Labs, Starline, Lens, Workspace).
Buy together. Build together. Sell together. Take risk together.
The cleanest two-agent fit in the market: Sierra builds the brand's agent; π€« builds the human's agent β consent-first, agent-to-agent, both sides owned by their principals.
Build together β an A2A bridge
Sierra agents execute returns, claims, and subscription changes via CRM/ERP.
A person's π€« Agent One transacts directly with a Sierra brand agent over open rails (MCP, A2A, AP2, UCP), consent-gated, with a receipt for every authorized action.
Two agents, two owners, one consented transaction β the marquee agent-to-agent case.
Sell together β a higher-trust channel
Sierra serves ~40% of the Fortune 50.
'Your Sierra agent, now reachable by your customers' own agents' β a consent-verified channel; and to humans, one agent that speaks to every brand's Sierra agent.
A higher-trust, consent-verified connection for brand and customer alike.
Buy together β the authoritative interface
Where a brand runs Sierra, that agent is the source of truth.
Agent One uses the brand's Sierra agent as the authoritative interface β no scraping, no fragile automation.
The consent-first, source-verified path (aligned with our anti-Avvo, verified-at-source principle).
Take risk together β outcome settlement
Sierra prices on successful resolution.
A design-partner pilot where Agent One initiates 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 β settled by consent, on both sides.
Two agents, one consented transaction.
This is the future of commerce: a person's own agent and a brand's own agent, transacting by consent, with a tamper-evident receipt on each side. Sierra powers the brand; π€« Agent One is the human; consent and control stay with the person β on their hardware, their receipt. And π€« Agent One is free for life to every US federal and state government employee and every past or present service member.
Buy together. Build together. Sell together.
The best business is fun when there is real money to be made and real value created for the people we both serve. That is the only partnership we will build β and we would be proud to build it with Sierra.
What this is, and isn't.
This is our proposal, assembled from public information β not a claim of partnership, endorsement, sponsorship, or investment by Sierra. Sierra is not currently a partner of HushOne or Hushh Technologies, and no announced deal exists. ARR and valuation figures are from reputable trackers/press, not audited disclosures; the Series E lead investor is reported variously; pricing dollar figures are third-party estimates. Sierra and related marks are trademarks of their owner. Our own certifications are 'in pursuit' until a 3PAO assessment or agency ATO says otherwise.