AI Voice Agents
That Sound Human

We use OpenAI's Realtime API for direct speech-to-speech processing, achieving response times under 320ms—up to 10x faster than traditional systems. Unlike older platforms that convert speech to text, process it, then convert back to speech, our AI processes audio directly. This means natural interruptions, tone awareness, and conversations that feel genuinely human.

Yes! Our setup process is designed to be simple: 1) Create your account, 2) Configure your agent's personality and instructions, 3) Connect your phone number, 4) Go live. Most users are up and running in under 10 minutes with our guided onboarding.

We use a simple pay-as-you-go model. If you exceed your included minutes, you'll only pay the overage rate shown in your plan (typically $0.015-$0.02 per minute). You'll receive notifications as you approach your limit, and there are no surprise fees.

Our speech-to-speech AI processes audio directly without converting to text and back. Traditional systems take 1-3 seconds (speech recognition → text processing → text-to-speech), but we respond in under 320ms. This enables natural interruptions, real-time conversations, and the AI can understand tone and emotion directly from your voice.

Yes! We offer a forever-free plan with 100 minutes per month—perfect for testing the platform with real calls and small-scale usage. No credit card required to start. You can upgrade to a paid plan anytime as your needs grow.

Yes! Our AI agents have built-in webhook support that works with any third-party service or automation tool. Connect seamlessly with platforms like n8n, Make (formerly Integromat), Zapier, or build custom integrations with your CRM, database, or internal systems. Webhooks enable real-time data exchange during calls for dynamic, personalized conversations.

Kalem works with any SIP trunk provider—Telnyx, Twilio, Vonage, or any other VoIP service. You can also connect your existing infrastructure like local VoIP gateways with SIM cards, landlines, or E1/PRI lines. This flexibility lets you keep your current phone setup while adding AI capabilities.

Our AI agents are powered by OpenAI's gpt-realtime model, which supports multilingual conversations. The AI can understand and respond in multiple languages including English, Spanish, French, German, Italian, Portuguese, Dutch, Arabic, Chinese, Japanese, Korean, and many more.

We offer natural-sounding female (Marin) and male (Cedar) voices. Each voice is fully customizable through system instructions—adjust accent, tone, speaking style, pacing, and personality to perfectly match your brand, from professional and authoritative to warm and friendly.

The model automatically mirrors the user's language and can maintain consistent accents/dialects throughout the conversation, or you can constrain it to specific languages based on your use case.

BYOC (Bring Your Own Credentials) allows you to connect your existing accounts with providers like OpenAI and your preferred SIP trunk provider (Twilio, Telnyx, Vonage, etc.) instead of using our pooled resources.

Benefits: You maintain direct billing relationships with providers, potentially lower costs if you have enterprise agreements, and complete control over your API usage. Perfect for businesses with existing vendor contracts or those requiring dedicated infrastructure.

Simply add your OpenAI API key and configure your SIP trunk settings in the dashboard. Kalem handles the orchestration, call routing, and agent management while you control the underlying services.

Yes. We take security and privacy seriously. All voice data is encrypted in transit using industry-standard TLS/SSL protocols. Call recordings and transcripts are stored securely and can be automatically deleted based on your retention policies.

We're GDPR compliant and follow data protection regulations. For healthcare clients, we support HIPAA-compliant configurations. Your data is never used to train AI models without explicit consent.

We maintain SOC 2 Type II compliance and conduct regular security audits to ensure your customer data remains protected.