Startup · $1.5b raised
global customer service player
San Francisco, OS
Every investor coverage indicates participated in a round Sierra raised.
| Investor | Rounds | Invested |
|---|---|---|
| Benchmark | Series D+ | - |
| Google Ventures | Series D+ | - |
| GV | Series D+ | - |
| Sequoia | Series D+ | - |
| Tiger Global | Series D+ | - |
| Greenoaks Capital | Series D+ · Unnamed stage · Unnamed stage | - |
Companies Sierra acquired or merged with, per published coverage. Buying a company is not investing in one: nothing here counts in the deals column.
| Name | Role | Sources |
|---|---|---|
| Bret Taylor | CEO | groundy.com |
| Clay Bavor | Founder | groundy.com, techbuzz.ai, theubj.com |
Stories naming Sierra. Where several outlets covered the same round, they are bundled under whichever ran the fullest account.
Analysis of Sierra's $950 million raise at a $15 billion valuation with Tiger Global and GV at the lead, weighing its revenue multiple, Fortune 50 customer lock-in, and competition from OpenAI and Anthropic's ventures.
Sierra, the enterprise AI agent firm started by Bret Taylor and Clay Bavor, has banked a $950 million Series E with Tiger Global and Google Ventures at the helm, plus Benchmark, Sequoia and Greenoaks.
Also TechCrunch Australia·aivy.com.au·cmswire.com·theaiworld.org·faq.com.tw·groundy.com
Crunchbase's unicorn tracker analysis finds AI-driven valuations added over half a trillion dollars in months, reshuffling the top twenty and minting eleven new decacorns in H2 2025, including Figure, Kraken, Mistral and Sierra.
Sierra has announced a $350 million Greenoaks-led round at a $10 billion valuation. The enterprise AI agent company previously took money from Sequoia, Benchmark and Greenoaks.
Agentio announces a $12m Series A with Benchmark leading and earlier backers Craft and AlleyCorp returning, taking the creator-advertising platform's total funding to $16.25m.