Sierra

Sierra is an enterprise AI customer service agent platform co-founded by Bret Taylor (former Salesforce co-CEO and OpenAI board chair) and Clay Bavor. It builds purpose-built conversational AI agents for enterprise brands that handle complex, multi-turn customer service interactions autonomously across voice, chat, and digital channels. Pricing is outcome-based and fully custom -- Sierra charges per resolved outcome rather than per seat or conversation. Third-party sources indicate pricing starts at approximately $150,000/year with implementation fees reportedly starting at $50,000. The outcome-based model means pricing scales with resolution volume and outcome complexity, making accurate budget prediction difficult before a commercial discussion. Enterprise customers include Sonos, WeightWatchers, and SiriusXM. Sierra differentiates on conversation quality -- its agents handle nuanced, emotionally sensitive interactions with a naturalness that simpler chatbot platforms cannot match. Best for large enterprises with high contact volumes where resolution quality and brand voice consistency are strategic priorities. Not suitable for SMBs or mid-market teams given minimum spend requirements.