Voice AI infrastructure
for developers
Build production-grade voice assistants in minutes. EU-hosted, GDPR-ready, on-premise capable. From €0,07/min.
Featured in
From zero to production in minutes
Three steps. No infrastructure to manage, no vendor lock-in, no surprises.
Configure your agent
Pick your STT, LLM, and TTS providers. Define your system prompt, tool calls, and voice. Use our dashboard or API — your choice.
Connect & deploy
Assign a phone number, connect your webhooks, and go live. Your agent handles inbound and outbound calls automatically.
Monitor & iterate
Watch live transcriptions, intervene in real-time, analyze call metrics. Iterate on your prompts and tool calls with full visibility.
Everything you need to ship voice agents
Full visibility into every call
Monitor live transcriptions, execute tool calls, and control your agents in real-time. A human-AI orchestration layer, orders of magnitude more powerful than anything else.
Learn about orchestrationYour keys, your models
Use our managed infrastructure or bring your own API keys. Switch between Deepgram, ElevenLabs, OpenAI, Mistral, or any supported provider without changing your code.
Learn about BYOKShip assistants in minutes
A clean, RESTful API that gets out of your way. Create assistants, manage calls, and hook into real-time events with a few lines of code.
Explore the APIconst response = await fetch(
'https://api.hmsovereign.com/api/v1/assistants',
{
method: 'POST',
headers: {
'Authorization': 'Bearer org_api_key_...',
'Content-Type': 'application/json'
},
body: JSON.stringify({
name: 'Support Assistant',
system_prompt: 'You are a helpful...'
})
}
);
const assistant = await response.json();Built for developers who ship fast
A clean TypeScript SDK and RESTful API. Create an assistant, start a call — that's it. No abstractions to fight.
import { HMSSovereign } from "hmsovereign"
const client = new HMSSovereign({ apiKey: process.env.HMS_API_KEY })
const assistant = await client.assistants.create({
name: "Customer Support",
model: {
provider: "openai",
model: "gpt-4o-mini",
systemPrompt: "You are a helpful support agent..."
},
voice: {
provider: "elevenlabs",
voiceId: "rachel"
},
transcriber: {
provider: "deepgram",
model: "nova-3",
language: "nl"
}
})
console.log(assistant.id)npm install hmsovereignv1.0.1Built for any conversation you need
From inbound support to outbound campaigns, VoiceDock powers voice agents across industries — all on the same orchestration core.
Customer support
24/7 inbound agents that escalate seamlessly to humans. Order lookups, refund flows, and FAQ handling.
Appointment booking
Reminders, confirmations, and reschedules. Wire it into your CRM and calendar of choice via custom tool calls.
Outbound campaigns
Lead qualification, surveys, follow-ups. Concurrent dialing with intelligent abandonment.
Hotels & restaurants
Reservation handling and front-desk overflow. Mews PMS integration in production for early customers.
Sensitive workflows
Insurance intake, internal helpdesks, and regulated industries. On-premise deployment available for full data control.
Internal tools
IT helpdesks, HR FAQs, sales enablement. Hook into your existing tools via custom function calls.
Every provider, one API
Mix and match STT, LLM, and TTS providers per agent. Switch providers with a single config change — no code modifications needed.
Bring Your Own Keys. Use your existing API keys and pay providers directly. We charge only for orchestration — €0,07/min. No markup on provider costs.
White-Label Voice Platform for Agencies
Sell AI voice minutes under your own brand. Complete infrastructure included -- fully branded client portal, integrated payments, usage tracking, and zero development work.
Fully Branded Client Portal
Custom domain, logo, and colors. Your brand, our infrastructure.
Integrated Stripe Payments
Automatic billing with configurable margins. Set your pricing and go live.
Real-Time Usage Tracking
Client self-service portal with call history and credit monitoring.
Flexible Configuration
Client-managed or agency-managed API keys. You choose the model.
White-Label Configuration
Full control over branding, pricing, and payment processing
Your platform layer, hosted in Europe.
Our orchestrator, dashboard, and storage run on EU infrastructure. Pair it with EU-resident model providers for an end-to-end European stack — or pick whatever fits your use case. We help you choose.
Managed Cloud
Deploy in minutes on our EU-hosted infrastructure. No US cloud providers in the path.
- Zero ops overhead
- Auto-scaling
- EU data residency
Private Cloud
Dedicated instances in the EU cloud provider of your choice. Full isolation in your own VPC.
- EU cloud providers
- Your compliance
- Custom SLAs
On-Premise
Full black-box installation on your hardware. Air-gapped networks supported.
- Your hardware
- Air-gapped capable
- Zero external calls
Deep tech for the most demanding environments
Banks, healthcare providers, government agencies -- we serve organizations where compliance isn't optional. HMS-Sovereign v1 runs entirely within your infrastructure with zero external dependencies.
EU residency for the data we control
Audio, transcripts, recordings, and metadata that flow through our orchestrator stay on EU infrastructure. Zero US cloud providers in our platform layer. Model-provider choice is yours and we'll advise on the most compliant stack.
Radically simple pricing
We orchestrate. You bring your keys. That's it.
Pure orchestration. Connect your own API keys for STT, LLM, and TTS.
+ your own provider costs
*Fair use policy applies
For scale-ups and enterprises with significant call volume. Volume-based pricing available.
Flexible pricing for your needs
Competitive volume-based pricing. Let's discuss what works best for your call volume.
Full sovereignty. On-premise, air-gapped, or private cloud deployment.
Full deployment support, training, and ongoing consultancy. Source code escrow available.
Enterprise services
Everything you need for mission-critical voice AI
Self-Hosted
On-Premise
Private Models
Custom Integrations
Training & Consultancy
Dedicated Support
Source Code Escrow
Custom SLA
Need something specific? We've built voice AI for banks, healthcare providers, and government agencies.
Let's discuss your requirementsReady to build the future of voice?
Join developers across Europe building production-grade voice AI. Personal onboarding, no self-service hassle.