What is Sierra?
Enterprise AI agents for customer service and customer operations.
- Category
- Customer-service AI agents
- Headquarters
- San Francisco, CA
- Founded
- 2023
- Employees
- ~300
- Total funding
- ~$1.6B disclosed/reported
- Valuation
- >$15B (May 2026 reported)
What is Sierra?
Enterprise AI agents for customer service and customer operations.
Sierra is a customer-service ai agents company headquartered in San Francisco, CA. AI agent platform, agent operating system, Agent Data Platform, integrations into customer systems, analytics, brand-safe conversation controls, and managed enterprise deployment. Public reporting placed Sierra at roughly $100M ARR in 2025 and more than $150M revenue around that period, with hundreds of enterprise customers across retail, finance, travel, and consumer brands. Named customers and case studies include SiriusXM, Sonos, WeightWatchers, SoFi, Brex, and others.
As of June 2026, the company is best understood by its wedge: AI agents, Agent OS, Agent Data Platform. Its market position is shaped by fast AI adoption, high compute needs, and enterprise buyers that increasingly want measurable productivity rather than generic AI demos. Sellers should treat the published numbers as directional when the company has not disclosed audited revenue, and should anchor outreach in the specific product line or buyer team that maps to the use case.
What does Sierra offer?
Sierra offers AI agents, Agent OS, Agent Data Platform, Integrations and related enterprise capabilities.
- AI agents· Customer service
- Agent OS· Platform
- Agent Data Platform· Data layer
- Integrations· Enterprise systems
- Analytics· Operations
- Brand controls· Governance
How does Sierra make money?
Sierra makes money through software, usage, and enterprise contracts.
Sierra does not publish self-serve prices. It sells enterprise contracts tied to customer-service volume, integrations, agent complexity, channels, and support requirements. Growth is driven by adoption of the core workflow, expansion to teams and enterprises, and usage intensity as AI features move from pilots into production.
The practical unit economics depend on compute, support, and integration depth. Self-serve products monetize through monthly subscriptions and usage; enterprise products monetize through annual contracts, security controls, data integrations, and support. For sellers, the budget owner usually sits where the tool changes labor cost: engineering, legal, support, creative operations, or knowledge-work productivity.
Who leads Sierra?
Sierra is led by Bret Taylor (Co-founder and CEO) and Clay Bavor (Co-founder and CTO).
- Bret TaylorCo-founder and CEOsince 2023Former Salesforce co-CEO, Google Maps co-creator, and OpenAI chair.
- Clay BavorCo-founder and CTOsince 2023Former Google executive leading product and technology.
- Fergal ReidHead of AIpublicly listedAI leader focused on agent quality and systems.
How do you contact Sierra's leadership?
Sierra does not publish verified personal leadership emails broadly. The contacts below use the format first@sierra.ai (format-following; verify before outreach); verify any personal address before outreach and prefer official contact forms or published aliases for press and partnerships.
first@sierra.ai (format-following; verify before outreach)How much funding has Sierra raised?
Sierra has raised ~$1.6B disclosed/reported; the latest reported valuation/status is >$15B (May 2026 reported).
Major disclosed funding events: Feb 2024: Launch funding - $110M. Sequoia and Benchmark backed the launch round. Oct 2024: Series round - $175M at ~$4.5B valuation. Greenoaks led the round with Sequoia, Benchmark, and others. Sep 2025: Growth round - $350M at ~$10B valuation. Reported round for agent expansion and enterprise growth. May 2026: Growth round - $950M at >$15B valuation. Reported financing led by Tiger Global and GV.
The valuation path matters because it signals both buying power and operating pressure. Companies with recent large rounds usually have budget for hiring, infrastructure, security, GTM, and finance systems, but they also professionalize procurement quickly. Where the latest valuation or amount is undisclosed, the profile names the round as reported rather than back-solving a number.
How did Sierra get here?
Sierra's path runs from founding in 2023 to its current customer-service ai agents position in June 2026.
- 2023Company startedBret Taylor and Clay Bavor began building Sierra after leaving Salesforce and Google roles.
- Feb 2024Public launchSierra announced its enterprise AI agent platform and $110M funding.
- Oct 2024$4.5B valuationGreenoaks led a $175M round.
- Nov 2025Customer conference and ADPSierra introduced Agent Data Platform and highlighted enterprise adoption.
- May 2026>$15B valuation reportedA $950M round was reported as Sierra scaled customer-service agents.
- 2026International expansionThe company continued selling to global enterprise service teams.
Who are Sierra's competitors?
Sierra competes with Salesforce Agentforce, Intercom, Ada, Zendesk and other AI-native workflow vendors.
Sierra — frequently asked questions
