# How SpareLabs uses Retell AI

**10x+**: “10x+ year-over-year growth in Spare’s AI product line”

As published on [retellai.com](https://www.retellai.com/case-study/how-sparelabs-put-ai-voice-on-the-front-line-of-public-transit-and-watched-it-take-off). Captured by usedby on 2026-10-05.

- Company: [SpareLabs](https://www.usedby.ai/companies/sparelabs.md)
- Tool: [Retell AI](https://www.usedby.ai/tools/retell-ai.md)
- Customer since (as the page says): In March 2024, Spare went live with Retell in early-access deployments.

## What the story says

Spare Labs built a single configurable voice agent on Retell AI that transit agencies can switch on to handle inbound rider calls such as booking rides, checking ETAs, and answering FAQs. It also makes outbound calls to riders on behalf of drivers who cannot locate them at pickup.

Summary written by usedby from the source page, in English. The figures are those of Retell AI and SpareLabs, not ours.

> Within the first week of going live, Spare’s agents were already handling around 30% of inbound calls, immediately cutting hold times at customers that were chronically understaffed.

- **~30%**: “~30% of calls automated in the first week of deployment”
- **~70%**: “~70% average resolution rate across customers”
- **100%**: “Up to 100% call resolution at top-performing customers”
- **~1 month**: “~1 month to build the initial Retell integration”

> The growth of our AI product has been probably our fastest-growing product of all time. In the past year, the AI product has over 10x growth. And it was already looking pretty good a year ago.
>
> Josh Andrews, COO

## What usedby checked

We compared the story with its live page on 2026-10-05.

- Checked: the figure 10x+ is printed word for word on the page, near the name of SpareLabs.
- Checked: the passage quoted above is copied word for word from the page, near the name of SpareLabs.
- Checked: SpareLabs uses Retell AI. Confirmed line. Latest check across sources: 2026-10-05.
- Not checked: the result itself. We quote it; we did not measure it.

---
Source: https://www.usedby.ai/case-studies/spare-labs-retell-ai · How we check: https://www.usedby.ai/methodology