
Sierra is the conversational AI platform for businesses. We help companies elevate their customer experience with AI.

Sierra is the conversational AI platform for businesses. We help companies elevate their customer experience with AI.
Product: Enterprise conversational AI platform (Agent OS: Agent Studio, SDK, Data Platform) for customer support across chat, voice, SMS, email
Founders: Bret Taylor and Clay Bavor
Funding: $635,000,000 total reported
Valuation signals: $4.5B (Oct 2024 round) and ~$10B (Sep 2025 round) reported
Customers / traction: Reported enterprise customers and ~ $100M ARR by Nov 21, 2025
| Company |
|---|
Customer experience and enterprise customer support automation using conversational AI agents.
2023
Software Development
$175,000,000
Round reported at a ~$4.5B valuation
$350,000,000
Round reported at about a $10B valuation
“Participation by Greenoaks Capital, Sequoia, Benchmark, ICONIQ and Thrive Capital reported”
At Sierra, we’re creating a platform to help businesses build better, more human customer experiences with AI. We are primarily an in-person company based in San Francisco, with growing offices in Atlanta, New York, and London.
We are guided by a set of values that are at the core of our actions and define our culture:
Our co-founders are Bret Taylor and Clay Bavor. Bret currently serves as Board Chair of OpenAI and has held significant roles at Salesforce and Facebook. Clay spent 18 years at Google, leading various initiatives including Google Workspace.
Job Title: Sales Engineer
Location: London
Employment Type: Full-time
Location Type: On-site
Department: Sales, Sales Engineering
Compensation: £116K – £172K • Offers Equity • Offers Commission
We offer the following benefits to full-time employees:
These benefits are subject to change and are detailed in Sierra's policies. Eligible full-time employees can participate in Sierra's equity plans.
We are committed to diversity and encourage applicants from all backgrounds to apply, regardless of race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class.