The Sierra blog

6 October 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.

4 September 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.

18 September 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.

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Introducing Sierra Summit 2025: the future of AI-powered customer experiences

Big things are coming at Sierra Summit 2025 — our first customer conference — where we’ll reveal new AI innovations and hear from leaders shaping how businesses grow through better, more human customer experiences. Request your spot today.

14 October 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.

6 October 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

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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

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 May 2025

London calling

We are excited to announce that Suveer Kothari will be joining Sierra as head of our new(ish) London office, which serves companies across the UK and Europe.

15 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 March 2025

See what Sierra can do for you.

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

Learn more