Bret Taylor's Sierra, which sells AI customer service agents, raised a $950M Series E led by Tiger and GV at a $15.8B post-money valuation, up from $10B in 2025 (Kate Rooney/CNBC)
Sierra, Bret Taylor's AI customer service agent company, raised $950M Series E at a $15.8B valuation (up from $10B in 2025), led by Tiger Global and Google Ventures.
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<a href="https://www.cnbc.com/2026/05/04/bret-taylor-sierra-fundraise-openai.html"><img align="RIGHT" border="0" hspace="4" src="http://www.techmeme.com/260504/i18.jpg" vspace="4" /></a>
<p><a href="https://www.techmeme.com/260504/p18#a260504p18" title="Techmeme permalink"><img height="12" src="http://www.techmeme.com/img/pml.png" style="border: none; padding: 0; margin: 0;" width="11" /></a> Kate Rooney / <a href="http://www.cnbc.com/">CNBC</a>:<br />
<span style="font-size: 1.3em;"><b><a href="https://www.cnbc.com/2026/05/04/bret-taylor-sierra-fundraise-openai.html">Bret Taylor's Sierra, which sells AI customer service agents, raised a $950M Series E led by Tiger and GV at a $15.8B post-money valuation, up from $10B in 2025</a></b></span> — Artificial intelligence startup Sierra is raising nearly a billion dollars in a new funding round, CNBC has learned … </p>
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