Sierra is a conversational AI platform founded in 2023 that helps businesses create, deploy, and manage personalized AI agents for customer service and support. The platform focuses on delivering human-like conversations and action-oriented capabilities, ensuring alignment with brand identity. Sierra's headquarters is in San Francisco, with additional offices in New York, Atlanta, and London. The company has raised $285 million in funding, reflecting strong investor confidence in its approach to enterprise AI.

The core offering, AgentOS, allows businesses to build and manage AI agents that integrate seamlessly with existing enterprise systems. Key features include the Experience Manager for designing branded conversations, multi-model AI integration for reliability, and personalized agents capable of handling various customer interactions across multiple channels. Sierra also emphasizes security and compliance, ensuring data privacy and strict access controls. The platform supports 24/7 multilingual assistance and aims to enhance customer experience through continuous improvement and analytics.