# Regal vs Vapi: who uses which

On usedby, 40 companies use Regal and 10 use Vapi. 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 2026-10-08: 50 of 50 public lines checked.

## Side by side

|  | [Regal](https://www.usedby.ai/tools/regal.md) | [Vapi](https://www.usedby.ai/tools/vapi.md) |
|---|---|---|
| Public customers | 40 | 10 |
| Confirmed | 26 | 6 |
| Observed | 14 | 4 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | EdTech & E-learning (4), Fintech & Payments (3), Insurance & InsurTech (2) | Construction (1), Fintech & Payments (1), Insurance & InsurTech (1) |
| Category | AI Phone Agents | AI Phone Agents |
| Data processing terms | A data processing agreement is available. ([regal.ai](https://www.regal.ai/security), checked 2026-10-08) | A data processing agreement is available. ([security.vapi.ai](https://security.vapi.ai/), checked 2026-10-08) |
| Free trial | — | Free trial or free plan available. ([vapi.ai](https://vapi.ai/pricing), checked 2026-10-08) |
| Pricing | — | No Success Package: $0 to start; Core: $29 / month; Pro: $999 /mo minimum; Premier: contact sales ([vapi.ai](https://vapi.ai/pricing), checked 2026-10-08) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Regal: [Healthbird](https://www.usedby.ai/case-studies/healthbird-regal.md): **250%**: “HealthBird instantly saw a 250% lift in agent productivity from using their Sales Dialer.” (captured by usedby 2026-10-08)
- Regal: [Career Karma](https://www.usedby.ai/case-studies/career-karma-regal.md): **2x**: “2x Lift in Conversions” (captured by usedby 2026-10-08)
- Vapi: [Fleetworks](https://www.usedby.ai/case-studies/fleetworks-vapi.md): **100+ engineering hours**: “100+ engineering hours saved per month, with all voice infrastructure work eliminated” (captured by usedby 2026-10-08)
- Vapi: [Instawork](https://www.usedby.ai/case-studies/instawork-vapi.md): **85%**: “85% lower cost: To keep up with demand, Instawork was projecting millions of dollars in costs to use human call screening.” (captured by usedby 2026-10-08)

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