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VoiceGremlin

VoiceGremlin is an AI-powered Development tool — Automated testing for AI phone agents via bot-to-bot calls. Best for: Development. Pricing: Freemium (GateOnAI Score: 38/100).

Automated testing for AI phone agents via bot-to-bot calls

FreemiumLive

VoiceGremlin provides end‑to‑end testing for AI phone agents, letting you run functional tests with real phone calls and real audio through a REST API. It treats your voice agent as production code and returns a pass/fail result in your CI pipeline. The service offers 100 free minutes of testing without requiring a credit card, and you can place your first test call in under a minute.

Summary written from VoiceGremlin's own website on 9 Oct 2026. Check the vendor's website for current details.

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Questions to ask the vendor

  1. Will you sign a GDPR data processing agreement (Article 28) and share your list of sub-processors?
  2. Where is our data stored and processed, and is it used to train your models?
  3. What does the free plan include, and what does the plan we need cost per user?
  4. Can we export all our data, and how is it deleted when we cancel?
  5. (Development) Is our code used to train models, and can we opt out?
  6. (Development) Who owns the generated code, and do you offer protection against licence or copyright claims?

Full checklist: 43 questions to ask an AI vendor · Alternatives to VoiceGremlin · Compare VoiceGremlin with Mistral

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