Bret Taylor

Bret is Co-Founder of Sierra. Most recently, he served as Co-CEO of Salesforce. Prior to Salesforce, Bret founded Quip and was CTO of Facebook. He started his career at Google, where he co-created Google Maps. Bret serves on the board of OpenAI.

Posts by Bret Taylor

Certified FedRAMP® High

We're excited to share that Sierra has been certified FedRAMP® High — the standard for cloud companies working with U.S. federal agencies.

10. Juni 2026

Better customer experiences. Built on Sierra

We’re raising $950 million from new and existing investors, at a valuation of over $15 billion.

4. Mai 2026

Sierra acquires Fragment in France

We are excited to announce the acquisition of Paris-based Fragment, which helps businesses scale their operations using AI, freeing up employees to focus on higher value work.

23. April 2026

Eric Eyken-Sluyters joins Sierra as President of Field Operations

We are excited to announce that Eric Eyken-Sluyters will be joining Sierra to lead our global Sales, Sales Engineering, and Partnerships teams.

1. April 2026

Sierra acquires Opera Tech in Japan

Today, we’re announcing that Sierra has acquired Opera Tech, a Tokyo-based enterprise AI startup.

27. März 2026

Agents as a Service

Sierra is reimagining software for the agent era—where you simply describe the outcome, and intelligent agents build, execute, and continuously improve the work for you. Meet Ghostwriter, the agent that creates and optimizes other agents, turning your ideas into production-ready customer experiences without clicks, code, or complexity.

25. März 2026

White text "Year two" on a grainy background with diagonal orange, yellow, and blue color gradients.

Year two in review

Sierra is heading into year three with over $150M in ARR, powered by rapid adoption from some of the world’s largest companies. The growth reflects a simple idea: when AI is built around real jobs to be done (not experiments), even the biggest enterprises can see meaningful impact fast.

6. Februar 2026

Sierra and Stellarus: Advancing a new model for AI-powered healthcare member experience

Sierra is partnering with Stellarus to help health plans like Blue Shield of California deploy AI agents.

12. Januar 2026

Sierra hits $100M ARR milestone in 7 quarters

Sierra just hit $100M in ARR — seven quarters after we launched in February 2024. That’s a heck of a lot quicker than we expected, and makes Sierra one of the fastest-growing enterprise software companies in history.

21. November 2025

Change agents: Safelite

How Safelite is transforming auto glass services for customers and insurance partners.

18. November 2025

Sierra Agent OS 2.0: from answers to memory and action

At Sierra Summit, we unveiled the future of AI agents: a single agent that works across every channel, learns from every interaction, and builds real customer relationships. With eight new products, including Agent Studio 2.0 and the Agent Data Platform, Sierra is turning the promise of AI-powered customer experience into reality.

5. November 2025

There's an agent for that, and it runs on Sierra

Today, we’re announcing that we’ve raised $350M additional capital at a valuation of $10B, led by Greenoaks, which is doubling down on Sierra.

4. September 2025

Gradient background with graduation cap icon

Calling new grads: APX year 2

Are you a college senior or recent graduate? If you’re driven to turn AI theory into practice, make an impact, and learn from some of the best in our industry, we’d love to build with you.

2. September 2025

Serving customer experience and engineering teams—all from one platform

Sierra’s Agent OS is the only platform that supports both no code and programmatic agent development. Our unique approach enables companies to mix and match—choosing the right approach for their business needs, and scaling their agent development as those needs evolve.

21. Mai 2025

Sierra expands to New York

We’re excited to share that Sierra is opening a New York office, and we’re hiring across agent development and sales.

7. Mai 2025

Change agents: Minted

Since we first started working together last year, AI has become central to Minted’s long-term innovation strategy—with information from AI conversations helping to inform their marketing, engineering, and product teams, as well as solving real customer needs with care and creativity.

24. April 2025

Sierra acquires Receptive AI

We want to ensure that Sierra has the best voice capabilities, and it’s why we’re excited to have acquired Receptive AI. Their voice technology is already integrated into Sierra, enabling companies to build AI agents once and deploy them across any channel.

26. März 2025

Announcing the Sierra APX program

The APX program is an 18-month rotational program that gives new graduates in computer science or a related field the opportunity to work closely with our customers, building AI agents as both an Agent Engineer and an Agent Product Manager.

12. November 2024

Sierra speaks

Voice is here. Sierra's AI agents can now engage consumers with rich, natural conversations over the phone—no wait times, no frustration. Learn how this new capability is reshaping the future of customer service.

9. Oktober 2024

The Agent Development Life Cycle

An autonomous AI agent is a new type of software that requires a new approach to development. Sierra has developed a novel, integrated approach to developing agents, from development to testing and release management. We call this the Agent Development Life Cycle.

3. Juni 2024

The Guide to AI Agents

AI agents are autonomous software systems that can reason, make decisions, and pursue goals with creativity and flexibility. They’ll soon be everywhere, helping consumers, employees, and businesses alike.

23. Mai 2024

Meet Sierra, the conversational AI platform for businesses

13. Februar 2024

Bret Taylor

Posts by Bret Taylor

Certified FedRAMP® High

Better customer experiences. Built on Sierra

Sierra acquires Fragment in France

Eric Eyken-Sluyters joins Sierra as President of Field Operations

Sierra acquires Opera Tech in Japan

Agents as a Service

Year two in review

Sierra and Stellarus: Advancing a new model for AI-powered healthcare member experience

Sierra hits $100M ARR milestone in 7 quarters

Change agents: Safelite

Sierra Agent OS 2.0: from answers to memory and action

There's an agent for that, and it runs on Sierra

Calling new grads: APX year 2

Serving customer experience and engineering teams—all from one platform

Sierra expands to New York

Change agents: Minted

Sierra acquires Receptive AI

Announcing the Sierra APX program

Sierra speaks

The Agent Development Life Cycle

The Guide to AI Agents

Meet Sierra, the conversational AI platform for businesses

Entdecken Sie, was Sierra für Sie tun kann

Posts by Bret Taylor

Certified FedRAMP® High

Better customer experiences. Built on Sierra

Sierra acquires Fragment in France

Eric Eyken-Sluyters joins Sierra as President of Field Operations

Sierra acquires Opera Tech in Japan

Agents as a Service

Year two in review

Sierra and Stellarus: Advancing a new model for AI-powered healthcare member experience

Sierra hits $100M ARR milestone in 7 quarters

Change agents: Safelite

Sierra Agent OS 2.0: from answers to memory and action

There's an agent for that, and it runs on Sierra

Calling new grads: APX year 2

Serving customer experience and engineering teams—all from one platform

Sierra expands to New York

Change agents: Minted

Sierra acquires Receptive AI

Announcing the Sierra APX program

Sierra speaks

The Agent Development Life Cycle

The Guide to AI Agents

Meet Sierra, the conversational AI platform for businesses