# Omnia vs Vapi

> Omnia runs duplex voice in your cluster and tests interruptions and silence on every release. Vapi’s testing guide leaves silences and interruptions to a person, and its interruption detection runs only on Vapi’s infrastructure.

Category: Customer service and voice. Checked against Vapi’s published material on 2026-10-22. Canonical page: https://www.altairalabs.ai/vs/vapi/

## Vapi gets a voice agent onto a phone number. Omnia tests what it does when the caller cuts in.

Omnia runs the voice stack in your cluster and tests the moment a caller cuts in, on every release. Vapi’s testing guide leaves silences and interruptions to a person, and its interruption detection runs only on Vapi’s infrastructure.

## When it matters: A caller says “no, wait” halfway through the agent reading out a balance.

**On Omnia:** That interruption ran a hundred times before release, landing early, late and on top of the number itself. The version that kept reading after being cut off stopped at the gate, and its recording is there to play back. (Omnia docs: https://promptarena.altairalabs.ai/arena/how-to/voice/setup-voice-testing/)

**On Vapi:** Vapi’s testing guide says to check by hand the silences and interruptions that simulations can’t reliably reproduce, and to listen to a sample of recordings. (source: https://docs.vapi.ai/test/voice-testing)

## Interruptions tested automatically

Interruption and silence scenarios run against every version before it can be promoted. Each call is recorded, so you listen to the ones that failed. (Omnia docs: https://promptarena.altairalabs.ai/arena/how-to/voice/setup-voice-testing/)

Vapi: Voice Simulations play the caller; silences and interruptions are tested by hand. (source: https://docs.vapi.ai/test/voice-testing)

## The voice stack runs in your cluster

Duplex voice and interruption handling run in Omnia’s runtime, inside your boundary, with the provider and model you choose. (Omnia docs: https://promptarena.altairalabs.ai/arena/explanation/duplex-architecture/)

Vapi: On-premise deployment isn’t supported, and endpointing and interruption detection run exclusively on Vapi infrastructure. (source: https://docs.vapi.ai/security-and-privacy/data-flow)

## A release that finds the problem on a slice of calls

Callers stay on the version they started with while the new one takes more of the traffic. If its metrics drop, Omnia moves the traffic back. *(enterprise)* (Omnia docs: https://omnia.altairalabs.ai/tutorials/progressive-rollouts/)

Vapi: Every publish is a version snapshot you can roll back to. Staged rollout and automatic rollback aren’t documented. (source: https://docs.vapi.ai/documentation/best-practices/enterprise-environments-dev-uat-prod)

## At a glance

| Topic | Omnia | Omnia docs | Vapi | Vapi docs | Source |
|---|---|---|---|---|---|
| Versions and rollback | Automatic, on the metrics. | https://omnia.altairalabs.ai/tutorials/progressive-rollouts/ | Version snapshots, manual rollback. | partly documented | https://docs.vapi.ai/documentation/best-practices/enterprise-environments-dev-uat-prod |
| Simulated callers | Multi-turn, against real tools. | https://promptarena.altairalabs.ai/arena/explanation/scenario-design/ | An AI tester plays the caller. | documented | https://docs.vapi.ai/test/voice-testing |
| Interruption and silence tests | Automated and recorded. | https://promptarena.altairalabs.ai/arena/how-to/voice/setup-voice-testing/ | Manual. | partly documented | https://docs.vapi.ai/test/voice-testing |
| Adversarial callers | Yes. | https://promptarena.altairalabs.ai/arena/how-to/voice/voice-red-team/ | Not documented. | not documented | https://docs.vapi.ai/test/voice-testing |
| MCP tool filtering | A CEL rule on every call. *(enterprise)* | https://omnia.altairalabs.ai/how-to/security/configure-tool-policies/ | Imports every tool a server exposes, with no per-tool filter. | not documented | https://docs.vapi.ai/tools/mcp |
| PII redaction | Sessions and memory, before storage. *(enterprise)* | https://omnia.altairalabs.ai/how-to/privacy/configure-privacy-policies/ | Not documented. | not documented | https://docs.vapi.ai/faq |
| Runs in your infrastructure | Yes. | https://omnia.altairalabs.ai/how-to/workspaces/manage-workspaces/ | Not supported. | not documented | https://docs.vapi.ai/faq |

## Questions

**How is each priced?**

Vapi charges per minute for hosting plus provider costs. Omnia runs on your infrastructure with no per-minute meter: free while you build, the core free in production, and an enterprise licence per environment per year from £30,000.

**Can Omnia use the same voice providers?**

Omnia treats speech-to-text and text-to-speech as provider roles, and runs realtime duplex models natively.