# Kustomer vs Zendesk AI: who uses which

On usedby, 32 companies use Kustomer and 27 use Zendesk AI. No company is listed with both yet. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-05: 55 of 59 public lines checked.

## Side by side

|  | [Kustomer](https://www.usedby.ai/tools/kustomer.md) | [Zendesk AI](https://www.usedby.ai/tools/zendesk-ai.md) |
|---|---|---|
| Public customers | 32 | 27 |
| Confirmed | 27 | 14 |
| Observed | 5 | 12 |
| Signals (job posts) | 0 | 1 |
| Top industries of customers | E-commerce & D2C (9), Fashion & Apparel (6), Travel & Hospitality (2) | DevTools & Infrastructure (4), Travel & Hospitality (3), E-commerce & D2C (2) |
| Category | Customer Service Automation | Customer Service Automation |
| Data processing terms | A data processing agreement is available. ([kustomer.com](https://www.kustomer.com/privacy/), checked 2026-10-07) | A data processing agreement is available. ([zendesk.com](https://www.zendesk.com/trust-center/), checked 2026-10-07) |
| Integrations | 8x8, Acuity Scheduling, Ada, AfterShip, Aircall, Amazon Connect, Amazon Redshift, AskNicely, Assembled, Attentive, Babelforce, BigCommerce ([kustomer.com](https://www.kustomer.com/integrations/), checked 2026-10-07) | Shopify, Microsoft Teams, Pipedrive, Klaviyo, GIPHY ([zendesk.com](https://www.zendesk.com/marketplace/), checked 2026-10-07) |
| Free trial | — | Free trial or free plan available. ([zendesk.com](https://www.zendesk.com/pricing/), checked 2026-10-07) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Kustomer: [MeUndies](https://www.usedby.ai/case-studies/meundies-kustomer.md): **66%**: “chat grew from 36% to 66% of all inbound volume in under 9 months” (captured by usedby 2026-10-03)
- Kustomer: [Coterie Baby](https://www.usedby.ai/case-studies/coterie-baby-kustomer.md): story without a checked figure. (captured by usedby 2026-10-03)
- Zendesk AI: [IRC-CEO](https://www.usedby.ai/case-studies/irc-ceo-zendesk-ai.md): **56 percent**: “a reduction by more than 56 percent” (published 2026-03-09)
- Zendesk AI: [Babbel](https://www.usedby.ai/case-studies/babbel-zendesk-ai.md): **50 percent**: “more than 50 percent of Babbel’s tickets are automated through AI agents” (published 2026-02-11)

---
Source: https://www.usedby.ai/compare/kustomer-vs-zendesk-ai · How we check: https://www.usedby.ai/methodology