Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $175M Series B (2025) at $4.5B val led by Sequoia. Founded by ex-Salesforce CEO Bret Taylor and Clay Baird. AI agents handling millions of customer service conversations for enterprise brands.
Sierra AI is a conversational AI platform for enterprise customer service and sales, building AI agents that handle complex customer interactions across support, returns, troubleshooting, and sales workflows for major consumer and enterprise brands. The company raised $175 million in Series B financing in 2025, led by Sequoia at a $4.5 billion valuation. Sierra was founded by Bret Taylor—former Co-CEO of Salesforce, former CTO of Facebook, and chair of OpenAI's board during the November 2023 crisis—and Clay Baird, with the thesis that enterprise-grade conversational AI requires different architecture than general-purpose chatbots.
Adept AI raised $415M to pioneer computer-use AI agents; its core research and agent team moved to Amazon in 2024 in a landmark talent acquisition while the company continues developing ACT-1 for enterprise automation.
Adept AI was founded in 2022 by a team of former OpenAI, DeepMind, and Google Brain researchers to build AI that can take actions on computers — navigating software interfaces, filling forms, and executing multi-step workflows in any application. Its ACT-1 model demonstrated the ability to control web browsers and desktop applications through natural language instructions, pioneering the computer-use agent paradigm that Anthropic later commercialized with Claude's computer use feature.
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