Sierra

Sierra is a technology company founded in 2023 that builds a conversational AI platform. The platform enables companies to create AI agents that interact with customers: answering questions, taking action, reasoning through complex problems and delivering personalised service. The agents operate across chat, SMS, WhatsApp, email and voice, among other channels, and are designed to be sophisticated, authentic and trustworthy.

Its customer base includes enterprise brands such as WeightWatchers, SiriusXM, Sonos and OluKai, spanning consumer weight management, media and entertainment, consumer electronics and e-commerce. The company's technical work covers conversational AI, natural language understanding, reasoning and action-taking systems, multi-channel communication and personalisation.

Sierra was founded by experienced technology executives, among them a former Salesforce co-CEO and a former Facebook CTO, alongside Clay Bavor, who spent 18 years at Google. The company states a mission to "make AI more human" and to build trustworthy AI. It employs a distributed team operating from six offices: San Francisco, New York, Atlanta, London, Singapore and France.