AI that takes your calls.
Enter your website. Call0 prepares your phone assistant – and calls you so you can test it.
Start without an account.
Built with privacy in mind
Companies working with Call0
One workspace for every conversation
Understand calls. Complete tasks. Keep everything documented.
Call0 connects calls, messages, knowledge and your systems. You define the behavior — the assistant handles the repetitive work.
In 100 seconds: import your website, choose a voice, add knowledge, connect your systems and test your agent.
Industry demos
This is how Call0 sounds in your industry.
Pick your industry and get a call from the matching demo. The businesses are invented, the conversation is real.
Mia AI practice reception
Demo Family Practice at the Park
Hello, Demo Family Practice at the Park, this is Mia, the practice’s AI assistant. How can I help you?
Try it Ask for a regular appointment.
Which number should Mia call?
Example Appointment request recorded
- Reason
- Check-up
- Preferred time
- Tuesday morning
- Callback
- requested, reachable after 2 pm
This is what a recorded request could look like. Nothing is booked or transferred in the demo.
How your test works
Website in. Agent ready.
Your website provides the knowledge. You choose the language, test your agent and take it over into your account.
You enter your company website. Call0 opens it and reads the publicly accessible pages.
You choose the language. From what it has read, Call0 prepares your phone assistant.
Your agent calls you. You talk to it the way your callers will later.
You take over exactly this agent into your account. Phone number, calendar and CRM are connected there for live use.
You enter your company website. Call0 opens it and reads the publicly accessible pages.
Start without an account.
Integrations
Call0 connects calls with your workflows.
Use connected services for appointments, email, CRM records and team notifications. Available actions depend on the service and your configuration.
Explore integrationsBuilt for real operations
Clearly configured. Reliably traceable.
Controllable privacy
Roles, data flows and retention remain transparently configurable.
Multilingual
One assistant can conduct conversations in multiple languages.
On your schedule
Around the clock, as overflow coverage or only outside business hours.
Frequent questions
What does the assistant sound like?
Listen to the available voices and test the agent yourself. Call0 clearly tells callers that they are speaking with an AI assistant.
What happens with complex questions?
You set the rules: for topics the assistant shouldn't handle, it forwards the call to you or your team — or takes a clean note for your callback.
Do I need a new phone number?
No. Simply forward your existing number to Call0 — or get a new number from us. Both take just a few minutes to set up.
How does Call0 support GDPR requirements?
Call0 explains its data flows and provides technical privacy controls. Required business data-protection terms are incorporated before processing on a customer’s behalf begins. Compliance for a specific use also depends on its configuration, legal basis and caller notices.
How fast can I get started?
Describe your business, choose a voice, and review the settings. No dedicated IT infrastructure is required.
What does Call0 cost?
Start on Free for as long as you like — no card needed. For more volume, choose Launch at €44, Growth at €99 or Scale at €299 per month. Overage is billed by the minute, cancel anytime.
Ready to never leave an important call unanswered?
Try Call0 yourself or schedule a personal demo for your workflow.