• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
TechAI

Silicon Valley CEO warns ‘absolutely there’s a bubble’ in AI valuations: ‘Nobody would be surprised’ if OpenAI ‘disappeared next Monday’

Paolo Confino
By
Paolo Confino
Paolo Confino
Reporter
Down Arrow Button Icon
November 21, 2024, 11:57 AM ET
C3.ai CEO Tom Siebel
C3.ai CEO Tom Siebel questioned the valuations of AI companies. "Absolutely there's a bubble."Chris J. Ratcliffe/Bloomberg

Wherever C3.ai CEO Tom Siebel goes he fields the same question about the future of AI. 

Recommended Video

“Everybody’s asking me about it, ‘Is there a bubble here?’ Absolutely there’s a bubble. It’s huge,” he tells Fortune in an exclusive interview at C3.ai’s New York offices in a Midtown WeWork. 

Over the last two years, analysts have pondered whether AI companies, both public and private, could possibly live up to their lofty valuations. Tom Siebel, who built his career in Silicon Valley as a sales executive at Oracle before leaving to start his own company that he eventually sold back to his former employer for $5.8 billion, the current state of AI reminded him of the dot-com bubble. Even then a great and wondrous technology—the internet—couldn’t save a host of companies from coming crashing down.  

“So we have this similar thing going on with generative AI that we’ve seen with previous technologies,” Siebel said. “The market is way, way overvaluing.”

Tech analysts that Fortune spoke to broadly agreed with Siebel’s point that valuations across the industry were inflated. “For now, virtually every notable AI company enjoys a fair degree of investor hype,” said Sandeep Rao, senior researcher at Leverage Shares, a provider of ETPs. 

C3.ai specializes in enterprise AI applications that help companies with various business functions like optimizing their supply chain, predictive maintenance, and tracking their sales process. It also has a spate of lucrative government contracts with the likes of the U.S. Department of Defense and the U.S. Air Force. Among its biggest private sector customers are oil and gas giant Shell and energy company Baker Hughes (whose contract is up for renewal soon). 

Earlier this week C3.ai added another blue chip partner to its ranks when it announced a partnership with Microsoft. Fortune’s interview with Siebel was conducted before the partnership was publicly revealed.

In particular, Siebel took aim at OpenAI, the startup with close ties to Microsoft and that is perhaps most closely associated with the AI revolution. OpenAI currently has a $157 billion valuation after an October funding round in which it raised $6 billion. Siebel wasn’t impressed by that valuation. 

“Nobody would be surprised if that company disappeared next Monday,” he said. 

When Fortune ventured that industry observers would be surprised, Siebel responded that it had “disappeared” over Thanksgiving, a reference to the brief ouster of OpenAI CEO Sam Altman in 2023. 

“If it disappeared, it wouldn’t make any difference in the world,” Siebel said of OpenAI. “Nothing would change. I mean, nobody’s life would change. No company would change. Microsoft would find something else to power Copilot. There’s like 10 other products available that would do it equally as good.”

The OpenAI brand name has cachet because it was first to market, but that alone can’t guarantee its market position in perpetuity, said Paul Marino, chief revenue officer at Themes ETF, an exchange-traded fund based out of Greenwich, Conn. “Just because you’re very well known doesn’t mean that you can’t be copied, replicated, and maybe even surpassed,” Marino said. 

In Rao’s view, there are differences between large language models, but they are difficult to understand. “LLMs are highly proprietary and nailing down definitive distinctions isn’t easy,” he said.  

Their success, he added, is often due just as much to their business relationships as it is to their underlying tech. “An LLM’s advantage isn’t necessarily dictated by quality but could be dictated by low cost barriers and ease of use with existing tech instead,” Rao said. 

In this regard, OpenAI certainly fits the bill, having established deep ties with Microsoft. 

OpenAI did not respond to a request for comment regarding Siebel’s comments. 

Siebel sees overvaluations throughout early stage AI startups as well. 

“There’s a long list of AI startups out of Illinois, Wisconsin, Stanford, that are being financed today on Sand Hill Road, where very little ideas by people who are highly inexperienced, who are going to build generative AI applications for dentist office, veterinarians, or divorce lawyers and these ideas are being financed at multi-billion dollar valuations,” Siebel said. They’re “just five people who don’t know anything [with] four pages of a business plan. This is crazy.”

Over the last few years, a spate of AI startups with highly specific use cases has cropped up, some of which have indeed sold or raised money at large valuations. Their track records have been a mixed bag. In August 2023, Casetext, which specializes in AI for legal work, sold to Thomson Reuters for $650 million. JasperAI, a startup focused on AI for marketing departments, raised $125 million at a $1.5 billion valuation in a Series A in June 2023 only to cut its internal valuation three months later, according to The Information. 

Exempt from Siebel’s criticism are the major tech giants developing their own suite of AI products. Microsoft and Amazon, he said, are “great companies” that aren’t overvalued. Neither are chipmakers Nvidia and TSMC. “If TSMC went out of business it would be the end of the world,” he said. 

When asked where C3.ai belongs, Siebel naturally has no doubts. “C3.ai is a bargain, okay? I mean, it’s a value stock buddy,” he said. 

Disclosure: Alan Murray, the former CEO of Fortune Media is on the board of C3.ai.

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Author
Paolo Confino
By Paolo ConfinoReporter

Paolo Confino is a former reporter on Fortune’s global news desk where he covers each day’s most important stories.

See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.


Most Popular

placeholder alt text
Success
Marriott’s CEO spoke out about DEI. The next day, he had 40,000 emails from his associates
By Ashley LutzJanuary 1, 2026
1 day ago
placeholder alt text
Politics
Buddhist monks peace-walking from Texas to DC persist even after being run over on highway outside Houston
By The Associated PressDecember 30, 2025
3 days ago
placeholder alt text
Success
Melinda French Gates got her start at Microsoft because an IBM hiring manager told her to turn down its job offer—'It dumbfounded me'
By Emma BurleighDecember 31, 2025
2 days ago
placeholder alt text
Startups & Venture
Trump Mobile says its first-ever smartphone is delayed, and the government shutdown is to blame
By Dave SmithDecember 31, 2025
2 days ago
placeholder alt text
Health
Lay's drastically rebrands after disturbing finding: 42% of consumers didn't know their chips were made out of potatoes
By Matty Merritt and Morning BrewDecember 31, 2025
2 days ago
placeholder alt text
C-Suite
Exiting CEO left each employee at his family-owned company a $443,000 gift—but they have to stay 5 more years to get all of it
By Nick LichtenbergDecember 30, 2025
3 days ago

Latest in Tech

Man wearing a black suit with a microphone
InvestingMicrostrategy
Michael Saylor’s Strategy flirts again with the danger threshold at which his company is worth less than his Bitcoin
By Jim EdwardsJanuary 2, 2026
1 hour ago
Musk
Travel & LeisureElectric vehicles
Tesla is officially smaller than China’s BYD in EV sales as it reports second-straight year of falling sales
By Nick LichtenbergJanuary 2, 2026
2 hours ago
blondie
Lawintellectual property
Betty Boop and Blondie join Mickey Mouse and Winnie the Pooh in the public domain
By Andrew Dalton and The Associated PressJanuary 2, 2026
3 hours ago
Eric Simons
Commentarystart-ups
15 years after skipping college to launch 3 startups, I believe the taboo around questioning higher ed is holding an entire generation back
By Eric SimonsJanuary 2, 2026
4 hours ago
Eric Schmidt sat in a white chair, speaking on a stage.
AIGoogle
How former Google CEO Eric Schmidt is motivated by Henry Kissinger to keep working past 70
By Jordan BlumJanuary 2, 2026
5 hours ago
Eric Schmidt, former Google CEO, speaks during the Collision 2022 conference at Enercare Centre in Toronto, Canada.
AIElectricity
Google ex-CEO Eric Schmidt jumps into the AI data center business with a failed, 150-year-old Texas railroad turned oil giant
By Jordan BlumJanuary 2, 2026
6 hours ago