Pricing: Enterprise custom
Best for: Customer Support
About
AI customer agents built for businesses that want branded, on-policy conversational AI that can actually take action — not just chat.
In-Depth Review
Sierra is an AI agent company co-founded by Bret Taylor (former Salesforce co-CEO and OpenAI board chair) and Clay Bavor (former Google VP). Launched in 2023, Sierra's pitch is straightforward: stop building chatbots that deflect customers, and start building AI agents that actually resolve their problems.
Unlike traditional chatbots that follow rigid decision trees, Sierra's agents are built on frontier language models fine-tuned on each company's specific policies, products, and knowledge. They can hold multi-turn conversations, ask clarifying questions, and take real actions in backend systems — processing refunds, updating subscriptions, scheduling appointments, or escalating appropriately when needed.
Sierra emphasizes that its agents stay on-policy: they will not make promises the company can't keep, will not be jailbroken into off-topic conversations, and maintain consistent brand voice throughout. Customers include Sonos, Weight Watchers, and SiriusXM.
Funding: $175 million Series B at a $4.5 billion valuation (2024). Pricing is enterprise-custom — not publicly listed.
Pricing
Enterprise custom
Capabilities
Categories
Pros & Cons
Cons
- Paid plans required for full access
- No public API
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Frequently Asked Questions
- Is Sierra free to use?
- Sierra is a paid tool, starting from Enterprise custom.
- What can Sierra do?
- Sierra supports AI agents, policy-adherent, action-taking, enterprise, generative AI, branded voice, system integrations. AI customer agents built for businesses that want branded, on-policy conversational AI that can actually take action — not just chat.
- Is Sierra good for customer support?
- Yes, Sierra is well-suited for customer support. AI customer agents built for businesses that want branded, on-policy conversational AI that can actually take action — not just chat.
- Does Sierra have an API?
- Sierra does not currently offer a public API.
- What languages does Sierra support?
- Sierra primarily supports English.