Sierra is a conversational AI platform designed for enterprise customer service. It enables companies to deploy branded AI agents that handle real-time queries, automate workflows, and execute actions such as updating CRM records or managing orders. The platform focuses on building AI agents that mirror brand voice, safeguard compliance and privacy, and integrate with enterprise systems for always-on support, aiming to move beyond basic chatbots by leveraging a multi-model architecture, guardrails, and supervision layers to reduce the risk of 'hallucinations' and ensure reliable, high-quality interactions at scale.