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Sierra logo — Sierra is the conversational AI platform for businesses.

Sierra

Sierra is the conversational AI platform for businesses.

Founded 2023 United States San Francisco, United States 759 employees Series E Total: $1.59B AI, Enterprise Software +1

General Information

Company Name Sierra
Founded Year 2023
Location United States San Francisco, United States
Employees 759
Industries AI, Enterprise Software, SaaS
Funding Stage Series E
Business Model B2B, SaaS, Platform
Revenue Model Usage Based, Subscription, Pay As You Go
Social

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Recorded by Bounce Watch from public sources. Every entry below carries the date we observed it, and when we have not looked recently the page says so rather than leaving silence to imply nothing happened.

In The News Oct 06, 2026

Featured on Cnbc: Meta joins with group of companies to tame ‘chaos’ of doing business with AI bot...

In The News Oct 06, 2026

Featured on Thenextweb: Sierra announces Personal Agent Protocol, an open standard for personal AI agent...

Get alerts when Sierra shows new signals

About Sierra

Sierra is carving a niche in the AI industry with its innovative platform, described succinctly by its slogan: "Sierra is the conversational AI platform for businesses." Founded in 2023, Sierra aims to enhance customer interactions by helping businesses create more engaging and human-like experiences through AI technology.

Categorized under industries such as AI, Enterprise Software, and SaaS, and headquartered in the United States, the company is strategically positioned to capitalize on the growing demand for AI solutions in enterprise settings.

A significant milestone in Sierra's financial growth is its recent $350 million private equity investment secured in September 2025. This robust funding round led by notable investors Greenoaks Capital, Thrive Capital, and ICONIQ, underscores confidence in Sierra's potential to revolutionize business interactions through AI.

Business keywords: Conversational AI, Business Challenges, Enterprise AI Solutions, AI Integration, Business Workflows, Streamlined Interactions, Issue Resolution, Personalized Support, Digital Transformation, Customer Service Automation, AI-driven Solutions, Support Optimization, AI Agents

Services & Products

AI Agents Development
Channel Unification
Customer Experience Optimization
Performance Monitoring and Testing
Agent Data Platform Integration

Target Customers

Financial Services Healthcare Providers Telecommunications Media Companies Travel and Hospitality Retail and Consumer Goods

Funding Rounds & Investors (4)

View All
Funding Stage Amount Investors Lead Investors Date
Series E $950.00M 5
Benchmark Greenoaks
Benchmark, Greenoaks +3
04 May 2026
Private Equity 350.00M 3
Greenoaks Capital Thrive Capital
Greenoaks Capital, Thrive Capital +1
03 Sep 2025
Venture Round $175.00M 3
ICONIQ Capital Thrive Capital Greenoaks
ICONIQ Capital, Thrive Capital +1
28 Oct 2024
Venture Round $110.00M 3
Benchmark
Benchmark, Sequoia Capital +1
13 Feb 2024

Latest News

View All
Sierra announces Personal Agent Protocol, an open standard for personal AI agents — Thenextweb
Sierra announces Personal Agent Protocol, an open standard for personal AI agents
Thenextweb Oct 06, 2026
Meta joins with group of companies to tame ‘chaos’ of doing business with AI bots — Cnbc
Meta joins with group of companies to tame ‘chaos’ of doing business with AI bots
Cnbc Oct 06, 2026
The Search for Silicon Valley’s Most Powerful Woman — Wired
The Search for Silicon Valley’s Most Powerful Woman
Wired Sep 21, 2026
Meta pays Microsoft hundreds of millions a year to rent AI models — Thenextweb
Meta pays Microsoft hundreds of millions a year to rent AI models
Thenextweb Aug 21, 2026
U.S.-China AI feud sees ASML walk tightrope between sales and geopolitics — Cnbc
U.S.-China AI feud sees ASML walk tightrope between sales and geopolitics
Cnbc Jul 17, 2026
After Harvey, vertical AI’s next $10B winner might be in agriculture — Thenextweb
After Harvey, vertical AI’s next $10B winner might be in agriculture
Thenextweb Jun 30, 2026

Sierra Alternatives & Competitors

View All Alternatives
Sierra vs
PolyAI
PolyAI United States

The leading provider of enterprise AI agents for customer service.

Series D
362 employees
AI, Big Data
Compare Sierra vs PolyAI
Sierra vs
Wonderful
Wonderful The Netherlands

The enterprise AI OS helping critical organizations accelerate AI adoption to unlock their full pote...

Series B
671 employees
AI, Enterprise
Sierra vs
NiCE Cognigy
NiCE Cognigy Germany

We are revolutionizing the customer service industry, creating AI Agents for Your Contact Center

Acquired
321 employees
AI, Automation
Also compare with: Sierra vs Hubtype Hubtype Sierra vs ada CX ada CX View all alternatives

FAQ About Sierra

Sierra is the conversational AI platform for businesses.
Sierra was founded in 2023.
Sierra is headquartered in San Francisco, United States.
Sierra operates in AI, Enterprise Software and SaaS. Its work centres on Conversational AI, Business Challenges, Enterprise AI Solutions and AI Integration. Its customers include Financial Services, Healthcare Providers and Telecommunications.
Sierra has a B2B, SaaS and Platform business model. Its revenue comes from Usage Based, Subscription and Pay As You Go.
Sierra has approximately 759 employees.
Sierra has completed 4 funding rounds, raising a total of $1.59B. The latest funding stage is Series E.
Sierra offers: AI Agents Development, Channel Unification, Customer Experience Optimization, Performance Monitoring and Testing, Agent Data Platform Integration.
Top alternatives and competitors to Sierra include PolyAI, Wonderful, NiCE Cognigy, Iterable, Camunda. These companies operate in related industries and serve comparable markets. You can compare them side by side on Bounce Watch.
Sierra and PolyAI are both companies in similar industries. Compare their funding, team size, growth signals, and market position on Bounce Watch to see which one fits your needs.

Source: BounceWatch company record for Sierra, https://bouncewatch.com/company/sierra, updated 19 May 2026. When citing, please name BounceWatch and link this page.

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