Sierra
Founded Year
2023Stage
Series D | AliveTotal Raised
$635MValuation
$0000Last Raised
$350M | 2 mos agoRevenue
$0000Mosaic Score The Mosaic Score is an algorithm that measures the overall financial health and market potential of private companies.
+77 points in the past 30 days
About Sierra
Sierra provides a conversational artificial intelligence platform for businesses to deploy artificial intelligence agents for customer support across multiple channels and languages. Sierra's solutions can integrate with existing technology stacks and focus on security and compliance. It was founded in 2023 and is based in San Francisco, California.
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ESPs containing Sierra
The ESP matrix leverages data and analyst insight to identify and rank leading companies in a given technology landscape.
The customer service AI agents & copilots market comprises tools that automate client support inquiries and processes across multiple communication channels. These solutions converse with customers, answer questions, support inquiries, and resolve issues. Many can handle complex inquiries and complete processes end-to-end with minimal human oversight. They may also provide real-time assistance to …
Sierra named as Leader among 15 other companies, including NICE, ServiceNow, and Zendesk.
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Research containing Sierra
Get data-driven expert analysis from the CB Insights Intelligence Unit.
CB Insights Intelligence Analysts have mentioned Sierra in 13 CB Insights research briefs, most recently on Oct 30, 2025.
Oct 30, 2025 report
State of AI Q3’25 Report
Oct 20, 2025 report
Book of Scouting Reports: 2025’s Digital Health 50
Aug 14, 2025 report
Book of Scouting Reports: Enterprise AI Agents
Aug 4, 2025
3 markets fueling the shift to agentic commerce
May 16, 2025 report
Book of Scouting Reports: 2025’s AI 100
Apr 24, 2025 report
AI 100: The most promising artificial intelligence startups of 2025
Mar 6, 2025
The AI agent market mapExpert Collections containing Sierra
Expert Collections are analyst-curated lists that highlight the companies you need to know in the most important technology spaces.
Sierra is included in 8 Expert Collections, including AI 100 (2024).
AI 100 (2024)
100 items
Generative AI
2,951 items
Companies working on generative AI applications and infrastructure.
Artificial Intelligence (AI)
37,243 items
Companies developing artificial intelligence solutions, including cross-industry applications, industry-specific products, and AI infrastructure solutions.
Unicorns- Billion Dollar Startups
1,297 items
AI Agents & Copilots Market Map (August 2024)
322 items
Corresponds to the Enterprise AI Agents & Copilots Market Map: https://app.cbinsights.com/research/enterprise-ai-agents-copilots-market-map/
AI agents
376 items
Companies developing AI agent applications and agent-specific infrastructure. Includes pure-play emerging agent startups as well as companies building agent offerings with varying levels of autonomy. Not exhaustive.
Latest Sierra News
Nov 4, 2025
Sierra, the artificial intelligence startup co-founded by OpenAI chairman and former Salesforce co-CEO Bret Taylor, is close to signing one of San Francisco's biggest office leases this year. The company has agreed to lease 300,000 square feet at 185 Berry St. in South Beach, said a person with direct knowledge of the deal who wasn't authorized to speak publicly. Sierra builds customer service AI agents and was recently valued at $10 billion. Founded in 2023 by Taylor and Clay Bavor, former head of Google Labs, the startup would lease under the pending deal more than three times the office space it currently occupies. Sierra leases around 80,000 square feet at 235 Second St. "Sierra has grown tremendously and this is a reflection of our growth and leadership," a Sierra spokesperson said. The company has hundreds of employees and plans to triple its headcount. A broker for 185 Berry St. landlords McCarthy Cook & Co. and JPMorgan Chase declined to comment. San Francisco Business Times first reported the pending deal. The two-building complex, known as China Basin, is also home to the headquarters of Lyft, which renewed its lease there last year but cut its space by more than half. If the pending deal closes, Sierra would become one of the biggest tech tenants in the city and join AI giants OpenAI and Anthropic in signing six-figure office leases. Taylor and Bavor said in September that the company has hundreds of customers and raised an additional $350 million. It previously raised $175 million in October 2024. The startup's focus on agents makes it a direct competitor to Taylor's previous employer, Salesforce. Taylor was also chairman of Twitter, now X, before Elon Musk bought the social media company in 2022. Sierra's deal would be the biggest new lease in San Francisco since OpenAI's 315,000-square-foot expansion in Mission Bay last year. Google also renewed its 405,000-square-foot lease at 345 Spear St. at the beginning of the year. Taylor leads the board of the OpenAI Foundation, the nonprofit that controls the $500 billion startup that recently completed a corporate restructuring, but is not an OpenAI employee. This story was originally published November 3, 2025 at 7:08 PM.
Sierra Frequently Asked Questions (FAQ)
When was Sierra founded?
Sierra was founded in 2023.
Where is Sierra's headquarters?
Sierra's headquarters is located at 150 Sutter Street, San Francisco.
What is Sierra's latest funding round?
Sierra's latest funding round is Series D.
How much did Sierra raise?
Sierra raised a total of $635M.
Who are the investors of Sierra?
Investors of Sierra include Greenoaks, Thrive Capital, ICONIQ Capital, Sequoia Capital, Benchmark and 8 more.
Who are Sierra's competitors?
Competitors of Sierra include Scaled Cognition, AgentifAI, Klart AI, Cognigy, Gradient Labs and 7 more.
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Compare Sierra to Competitors
Decagon operates as a company that focuses on conversational Artificial Intelligence (AI) within the technology sector. The company provides a platform for creating and optimizing Artificial Intelligence (AI) agents to offer customer support across channels like chat, email, and voice. The company serves various sectors, including retail, travel, technology, financial services, health, media, and telecommunications. It was founded in 2023 and is based in San Francisco, California.
Ada specializes in artificial intelligence (AI) powered customer service automation within various business sectors. The company offers a platform that enables enterprises to resolve customer inquiries efficiently across multiple channels and languages without the need for extensive human intervention. Ada's solutions cater to industries such as e-commerce, financial technology, software as a service (SaaS), and gaming. It was founded in 2016 and is based in Toronto, Canada.
Leena AI provides enterprise artificial intelligence (AI) solutions within the technology sector. The company offers automation for information technology (IT), human resources (HR), and finance processes, leveraging Agentic AI to reduce service tickets and facilitate self-service for employees. Leena AI's products aim to integrate with various enterprise applications. It was founded in 2015 and is based in San Francisco, California.
Intercom operates as an artificial intelligence (AI) customer service company that operates within the customer support industry. The company provides AI tools that aim to improve customer service efficiency. Intercom serves businesses that are interested in utilizing AI technology for their support operations. It was founded in 2011 and is based in San Francisco, California.
Inbenta specializes in conversational AI and automation within the customer service sector. The company offers a suite of products, including AI-enabled chatbots, search tools, and knowledge management systems designed to enhance customer experience and streamline service operations. Inbenta's conversational AI platform is utilized across various industries to automate customer interactions, provide self-service options, and improve overall customer satisfaction. It was founded in 2005 and is based in Allen, Texas.
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[24]7.ai provides artificial intelligence (AI)-based customer service products and solutions. It offers solutions such as conversation automation solutions, workforce engagement solutions, campaign management solutions, and more. [24]7.ai was formerly known as 24/7 Customer. It was founded in 2000 and is based in Campbell, California.
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