Our customers’ ambition is accelerating our growth

We launched Sierra just over two and a half years ago. This week, we hit $400M+ in ARR, adding over $150M+ in ARR in Q3 alone. That’s more ARR in one quarter than we generated all of last year. More importantly, our growth is accelerating: we took six months to double from $100M to $200M ARR, and only five months to double from $200M to $400M.

This growth is driven by a number of different factors, including:

The increasing ambition of our customers — while being some of the largest and most heavily regulated businesses in the world, they’re pushing to do more with their agents, faster.
A step change in what agents can do — moving from one-and-done support conversations to interactions that last weeks or months and drive revenue.
The ease of building and improving agents with Ghostwriter — this month a large US retailer ($40B+ in revenue) went from first meeting to live agent in 27 days.

Looking toward 2027, we’re excited to help businesses — we now work with almost 50% of the Fortune 50 — answer the big questions they’re facing. How do I turn our AI investments into measurable returns? Are personal agents an opportunity or a threat? What’s my competitive advantage when everyone has access to the same intelligence?

Our approach is grounded in the belief that:

You pay for outcomes, not tokens used — a loan refinanced, an insurance claim paid, a sale closed, a customer retained.
Your customer relationships are your competitive advantage — with AI agents they deepen with every interaction, creating context that is uniquely yours and which compounds over time.
You need fine grained controls over how personal agents interact with your brand — we’re developing an open standard, Poppy, with over 50 enterprises including Meta, Instinct, Rocket, Shopify, Stripe, and Walmart to make this a reality.

So please bring us your hard problems. The ones that span thirty customer conversations, take weeks or months, involve multiple systems, and need fifty employees on a Zoom just to understand, let alone fix. Those are the problems AI was made for, and that our team at Sierra is excited to help you solve.

Huge thanks to every company and employee that’s taken a bet on us. We’re deeply grateful and excited for what we can all achieve together.