Bret Taylor’s Sierra Raises $950 Million at $15.8 Billion Valuation
Bret Taylor’s Sierra, which sells AI customer-service agents, has raised $950 million in a Series E financing led by Tiger Global and Google’s GV, with Benchmark, Sequoia and Greenoaks also participating. The round values the company at $15.8 billion on a post-money basis, up from $10 billion in 2025.
Taylor said Sierra now has more than $1 billion to invest, serves more than 40% of the Fortune 50 and that agents built on its platform are powering billions of customer interactions. The company said those uses include home refinancing, insurance claims, order returns and fundraising.
From the sources (4 posts)
@mtsliveSITUATION DETECTED: Bret Taylor’s Sierra has raised $950M in a Series E led by Tiger Global and Google’s GV, with Benchmark, Sequoia and Greenoaks also participating.
@tbpnBREAKING: Sierra raises $950M at a $15B valuation led by Tiger Global and GV
@techmemeBret 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 (@kr00ney / CNBC) (Visit Techmeme dot com for the link and full context!)
@btaylorSierra is raising $950 million from new and existing investors, led by Tiger Global and GV, at a valuation of over $15 billion. We now have more than $1 billion to invest in becoming the global standard for companies wanting to transform th