Thomas Siebel vs Jeff Bezos
Real-time net worth, career, and company comparison — updated May 2026.
Wealth at a Glance
Net worth gap: $268.3B — equivalent to 99% of Jeff's total wealth.
Tale of the Tape
Net Worth History
| Year | Thomas | Jeff | Leader |
|---|---|---|---|
| 2022 | — | $128.7B | — |
| 2023 | — | $111B | — |
| 2024 | $3.9B | $222.3B | Jeff |
| 2025 | $3.9B | $224B | Jeff |
| 2026 | $3.956B | $272.272B | Jeff |
Career Highlights
Thomas Siebel
- 1984Joined OracleHeld various management positions at Oracle Corporation.
- 1993Founded Siebel SystemsFounded Siebel Systems, a CRM software company.
- 2006Siebel Systems AcquiredSiebel Systems was acquired by Oracle for $5.8 billion.
- 2009Founded C3.aiFounded C3.ai, an enterprise AI software company.
- 2025Transitioned to Executive ChairmanTransitioned to Executive Chairman of C3.ai.
Jeff Bezos
- 1994Founded AmazonEstablished Amazon.com as an online bookstore in Seattle, Washington.
- 1997Amazon IPOTook Amazon public, raising $54 million.
- 2000Founded Blue OriginFounded Blue Origin, an aerospace manufacturer and sub-orbital spaceflight services company.
- 2013Acquired The Washington PostPurchased The Washington Post for $250 million.
- 2021Stepped down as Amazon CEOTransitioned to the role of Executive Chairman of Amazon.
The Verdict: Jeff Bezos vs Thomas Siebel
As of May 2026, Jeff Bezos leads this comparison with a net worth of $272.272B, placing at #4 in the global rankings. Thomas Siebel follows at $3.956B — a gap of $268.3B.
Both executives operate in the Technology sector, making this a direct peer comparison. Their wealth trajectories reflect the broader performance of that industry over time, though individual company strategy, equity ownership structure, and capital allocation decisions have driven meaningfully different outcomes.
Thomas Siebel is 73 years old versus 62 for Jeff Bezos, a difference of 11 years. Age context matters in wealth comparisons: a younger billionaire at the same net worth has had less time to accumulate — and in many cases represents a higher compound annual growth rate on their wealth.
Net worth figures are estimates calculated from public shareholding disclosures, stock price data, and reported asset values. See our full methodology.
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Net worth estimates updated daily from public financial disclosures. Methodology · Report an error