Xcout Intel
Sierra
Sierra is a conversational AI company that provides a platform for businesses to build and deploy AI agents across multiple channels. The company's products enable organizations to create human-like customer experiences, automate workflows, analyze performance, and drive revenue growth.
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Sierra at a glance
Sierra is an ai/ml company headquartered in San Francisco, United States. It has raised at least $1.3B across the 2 funding rounds on record. Its most recent funding round, Series E, raised $950M in May 2026. Xcout tracks 2 named people at Sierra, including Bret Taylor (Co-founder). Xcout recorded 175 job postings from Sierra in the last 90 days, naming tools such as OpenAI API, Salesforce, Claude Code.
Sierra leadership
- Bret TaylorCo-founder
- Clay BavorCo-founder
Sierra funding rounds
At least $1.3B raised across the 2 rounds on record. Every round on record:
| Date | Round | Amount | Investors |
|---|---|---|---|
| Series E | $950M | 5 named | |
| — | $350M | 1 named |
Who invested in each round, lead investors, valuations and the co-investor graph — open the full funding history →
Hiring at Sierra
Xcout recorded 175 job postings from Sierra in the last 90 days, from a hiring record Xcout has kept since May 2026.
Tools named in Sierra's job postings
The weekly hiring trend, the roles and locations behind it and all 15 tools — see Sierra's hiring signals →
Recent Sierra news
- PartnershipSierra Announces Partnership With Softbank
Hiring vs the trend
Based on 99 job postings in the last 8 weeks (10 Aug – 4 Oct 2026), compared with 197 startup technology companies.
This describes a hiring pattern — how often Sierra’s job postings ask for AI skills, and how that changed against the previous 8 weeks, ranked among its peers. It says nothing about the company’s products or performance.
Signed-in members see the AI-skill share and its change with peer percentiles, role mix, posting momentum and advertised US pay against the market.
Investors
Tech stack
Sierra competitors
A few of Sierra's closest competitors — see the full list of competitors and alternatives →
Cresta provides an enterprise AI platform designed for customer experience (CX) operations. The company offers AI agents, real-time agent assistance, and conversation intelligence tools to automate customer interactions, reduce costs, and improve performance for contact centers across industries such as finance, travel, and telecommunications.
Cognigy provides generative conversational AI platforms and enterprise AI agents for automated customer service and contact centers.
Siena AI builds empathic AI agents designed for commerce and brand operators to automate customer service and customer experience operations. The company is headquartered in New York, NY.
Simple AI provides intelligent AI phone agents and communication tools designed to handle inbound sales, customer support, lead qualification, and appointment booking. The platform automates customer conversations across voice, chat, SMS, and email while integrating with existing business software to drive revenue and streamline operations.
Chatbase is a technology platform that enables businesses to build and deploy AI agents for customer support and revenue generation. The company focuses on providing tools for automating business interactions.
Aisera is an agentic AI and Gen-AI native enterprise software company headquartered in Santa Clara, California. It provides automated AI solutions for IT, HR, and customer service operations with a global workforce spanning multiple regions.
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More on Sierra in Xcout Intel
- 2 named people with titles, LinkedIn and board committees
- 2 funding rounds with the investors in each, and who they co-invest with
- Weekly hiring history and the mix of roles behind it
- 1 corporate event with sources — deals, leadership changes, layoffs
- The full competitor set, tracking, exports and API access