The most credible customer service agent on the market. Bret Taylor and Clay Bavor built it. Fortune-brand traction backs it up.
Sierra is the autonomous customer service agent platform built by Bret Taylor (former Salesforce co-CEO) and Clay Bavor. Used by major consumer brands to resolve customer service tickets end-to-end.
What it does
Sierra deploys customer service agents that resolve support tickets without human handoff. The agents handle chat, voice, and email. They integrate with the company's existing systems — commerce platform, CRM, returns flow, payments — and can complete actual transactional resolutions, not just answer FAQs.
The product philosophy: each Sierra agent is brand-customized. SiriusXM's agent sounds like SiriusXM. WeightWatchers' agent sounds like WeightWatchers. The personalities, escalation paths, and tone-of-voice are configured per customer. That brand-specificity is what enterprise buyers pay for.
Key features
- Multi-channel — chat, voice, email
- Brand-customized agent personality and tone
- End-to-end transaction completion (refunds, exchanges, account changes)
- Integration with major CRMs, commerce platforms, and customer data systems
- Quality assurance and conversation review tooling
- Multi-language support
- Compliance and audit trails
Pricing
Enterprise pricing only. Quoted per deployment. Typically scales with conversation volume and integration scope.
Common use cases
- “Customer wants to return an item and get a refund.”
- “Customer has a billing question about their subscription.”
- “Customer is trying to cancel and we want to retain them.”
- “Customer is asking about an order status.”
- “Customer needs help setting up a new device.”
- “Customer is escalating a complaint and the agent needs to handle it gracefully.”
Company
Founders: Bret Taylor (former Salesforce co-CEO, Facebook CTO) and Clay Bavor (former Google VP, AR/VR)
Founded: 2023
HQ: San Francisco
Chairman: Bret Taylor (also chairman of OpenAI's board)
Funding
Sierra has raised significant capital at multi-billion-dollar valuations, with rounds led by Sequoia and other tier-one venture firms. The company is one of the most well-funded AI agent startups in the consumer service category.
Integrations
Connects to Salesforce, Zendesk, HubSpot, Shopify, the major payment platforms, and most enterprise CRMs and customer data systems.
Alternatives
Direct competitors include Decagon, Cresta, Parloa, Ada, and Forethought. The EPR AI Agents Directory ranks Sierra at the top of the customer service category on brand-deployment credibility.
Try it
sierra.ai — enterprise inquiries only.
EPR editorial verdict
Sierra is what happens when the right founders meet the right category at the right moment. Bret Taylor knows enterprise distribution; Clay Bavor knows product. The result is the most credible customer service agent on the market, with named Fortune brand traction that most competitors cannot match.
EPR rating: 9.1/10.
Last updated
May 25, 2026.
Related EPR coverage: AI Agents Directory · Decagon · Agents Do Work. Tools Don't.
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