Number in, verdict out.
Connect your agent
Enter your agent's phone number. No SDK, no integration, no access to your agent platform.
Describe what it should do
Paste a description or your system prompt. We turn it into an editable agent profile and generate the test scenarios for you. No description at hand? Start a discovery call instead and it builds the profile for you.
Wir_Schwatzen does the rest
Synthetic callers phone your agent, each scenario several times. You see whether it's ready to go live, and what to fix if it isn't
Whatever your agent builder, Wir_Schwatzen can test it.
We test over a real phone call. If your agent has a phone number, we can test it.
- NiCE Cognigy
- Parloa
- Vapi
- Retell AI
- Symanto
- LiveKit
- Deepgram
- ElevenLabs
Wir_Schwatzen is independent and not affiliated with any of these providers. All names and logos are trademarks of their owners.
Tests that behave like real callers.
And results that the person who signs off can read, and the engineer can act on.
Agent profile
From your description or system prompt we derive what your agent can do, the rules it follows, the data it asks for and the facts it uses. Don't know the agent? Discovery calls build the profile for you.
Generated scenarios
Test scenarios are generated from the profile, including universal checks for security and privacy. Adjust them in the no-code editor.
Synthetic callers
10 personas with different emotions, speaking speed, interruptions, filler words and background noise.
Variance shown, not hidden
Every scenario runs several times and ends as Pass, Fail, Flaky or Inconclusive. If your agent passes once and fails the next time, you see it.
Verdict first, evidence one click away
Every check shows its verdict, the reasoning and the timestamp of the evidence. Caller and agent are recorded on separate channels, so latency, silences and interruptions are measured per turn.
Retests on schedule
Run tests daily or weekly and get an email when your agent's readiness drops. Share a link to the exact second in a call where things went wrong.
Your call data stays in Europe.
Test calls contain voices, names and customer data. We built Wir_Schwatzen in Nürnberg for European companies that cannot send these recordings to the US.
EU data residency
Calls, recordings and transcripts are processed and stored in the EU. The data region is shown in the product.
Redacted by default
Personal data in transcripts and audio is redacted by default, following the GDPR principle of data minimisation.
You decide retention
Set per organisation how long recordings and transcripts are kept.
Privacy tests for your agent
Scenarios try to override your agent's instructions, extract its system prompt or get another person's data, and check that it tells callers it is an AI, as the EU AI Act requires.
Test your voice agent before your customers do.
We are now taking on a small group of agencies and teams for free. Paid plans follow in April 2027, from EUR 99 per month.