NextCall / Neural Voice Infrastructure
Frequently asked questions
Everything you need to know about AI voice agents, providers, pricing, and security.
Product
How do AI voice agents work?
You configure an agent with instructions, voice, and tools. When a call connects, the agent listens, reasons, and responds in real time using speech-to-text, LLM, and text-to-speech — handling qualification, booking, support, and more.
Providers
Which phone providers are supported?
Twilio, TelephonyX-style SIP trunks, Vonage, Telnyx, and custom BYO SIP providers. Connect numbers you own or provision new ones through supported carriers.
Pricing
Is there a free trial?
Yes. Start with a 14-day trial including call minutes, one agent, and full platform access. No credit card required for trial signup.
Security
How is tenant data isolated?
Each workspace has isolated agents, numbers, calls, billing, and API keys. Platform admins cannot access tenant call content without audited impersonation.
Billing
What happens if I exceed my plan limits?
Usage-based overage rates apply for extra call minutes. You'll receive warnings as you approach limits and can upgrade or purchase add-ons anytime.