The Sierra blog

October 6, 2025

Voice turns one

One year after launching voice, Sierra is powering hundreds of millions of conversations — showing how natural conversation is fast becoming the most powerful customer interface.

September 4, 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.

September 18, 2025

Meet Agent Studio: build sophisticated agents without code

Sierra's Agent Studio empowers teams of all technical abilities to build and ship highly-effective agents fast.

Gradient mixed colors, agent building icons

A man sits at a table and types on his computer.

Five ways to use AI agents: financial services

Services like banking and insurance play a critical role in our lives, and whatever the issue—whether you’re locked out of your account, disputing a charge, trying to find the right tax information or making a claim—you want to know you’re in the best hands. And that’s where AI agents can really help.

April 8, 2025

What is an AI agent? And why does my business need one?

Agents are software that can complete tasks on their own, without supervision, just like a human. And AI agents solve the age-old tension between better experiences and higher costs—so you can serve more customers, more often, and in more meaningful ways.

April 1, 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.

March 26, 2025

Same platform, different personalities

Your AI agent is an extension of your brand’s voice, values, and customer experience. As Harmony, Duncan Smuthers, and Barbra all show, Sierra can help your business build better, more human customer experiences with AI.

March 20, 2025

Sierra’s 𝜏-bench is shaping the development and evaluation of agents

We explore how Sierra’s 𝜏-bench is shaping the development and evaluation of agents—from academic research to industry applications and next-generation development.

March 18, 2025

Gardening week: evergreen engineering

At Sierra, we value intensity and craftsmanship—Gardening Week is an investment in the long-term quality of our software.

March 13, 2025

Outcome-based pricing for AI agents

AI agents executing processes autonomously enable an entirely new pricing model, where you pay only when the software achieves specific, valuable outcomes: outcome-based pricing.

December 10, 2024

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.

November 12, 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.

October 9, 2024

See what Sierra can do for you

Find out how Sierra can help your business build better, more human customer experiences with AI.

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