AI Landscape / Customer Service & Contact Centre AI
Sierra
Builds AI agents that handle customer conversations for brands.
Company profile
Sierra sells AI customer service agents to businesses, combining models from OpenAI and Anthropic with its own fine-tuned proprietary layers. cnbc.comSierra website
Founded by Bret Taylor and Clay Bavor, Sierra counts Tiger Global, Google's GV, Benchmark, Sequoia and Greenoaks among its investors. cnbc.com
- Founded
- Not publicly reported
- Founders
- Bret Taylor, Clay Bavor
- Headquarters
- Not publicly reported
- Chief executive
- Not publicly reported
- Employees
- Not publicly reported
- Ownership
- Not publicly reported
- Total funding
- Not publicly reported
- Latest funding round
- $950 million; led by Tiger Global and Google's GV
- Valuation
- $15.8 billion post-money
- Revenue
- Not publicly reported
Drawn from Wikidata, Wikipedia, the company's own site and news and web sources; each figure links to its source. Researched Oct 19, 2026.
Latest news
BBVA will help define the common protocol of Sierra AI and Meta to connect AI agents with companies
BBVA To Help Project Led By Meta, Sierra AI To Connect AI Agents With Businesses
BBVA will help design a common protocol led by Sierra AI and Meta to connect AI agents with businesses
Sierra AI expands again in Mission Bay
Liberty Global begins Sierra AI rollout at Virgin Media O2
Liberty Global taps Sierra AI to support 80M connections
Liberty Global picks Sierra AI platform for customer contact
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