Thomas Siebel
Entrepreneur · software
1952 · United States
$4Breported estimate as of February 2026 · Forbes
Thomas M. Siebel is an American businessman, technologist, and author. He founded the enterprise software company Siebel Systems and was the founder, chairman, and former CEO of C3.ai, an artificial intelligence software platform and applications company.
Sources (4)
- Thomas Siebel (Q2427296) · Wikidata
- Thomas Siebel · Wikipedia
- Thomas Siebel — Forbes net worth (via Wikidata) · Forbes · 2025
- Thomas Siebel — Forbes net worth (stated on Wikipedia) · Forbes · 2026



