# How 11X uses Cartesia

As published on [cartesia.ai](https://www.cartesia.ai/customers/11x), March 2025. Captured by usedby on 2026-10-08.

- Company: [11X](https://www.usedby.ai/companies/11x.md)
- Tool: [Cartesia](https://www.usedby.ai/tools/cartesia.md)
- Teams: Sales, Go-to-market

## What the story says

11x uses Cartesia's voice AI to power the speech of Julian, its AI voice agent that makes sales phone calls. Cartesia supplies low-latency, expressive voices that can be adjusted in speed, emotion and tone during conversations.

Summary written by usedby from the source page, in English. The figures are those of Cartesia and 11X, not ours.

> Ultra-Low Latency: Built on state space models (SSMs), Cartesia delivers industry-leading response times under 100ms, ensuring natural, real-time conversations that keep prospects engaged and reduce dropped calls.

- **under 100ms**: “Cartesia delivers industry-leading response times under 100ms”
- **200+**: “With access to 200+ ultra-realistic voices”

> In 1999, Salesforce brought software to the cloud. In 2025, 11x is killing software as we know it and unleashing the era of digital workers. To realise this vision, we needed AI voice technology that feels truly human. Cartesia’s technology gives our AI digital workers reps the speed, reliability, and natural expressiveness required to engage customers at scale.
>
> Keith Fearon, Head of Product & Growth

## What usedby checked

We compared the story with its live page on 2026-10-08.

- Checked: the passage quoted above is copied word for word from the page, near the name of 11X.
- Checked: each number in our summary is printed on the page.
- Checked: the publication date is read from the page’s own metadata, never guessed.
- Checked: 11X uses Cartesia. Confirmed line. Latest check across sources: 2026-10-08.
- Not checked: the result itself. We quote it; we did not measure it.

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Source: https://www.usedby.ai/case-studies/11x-cartesia · How we check: https://www.usedby.ai/methodology