Enterprise Telecom, Reimagined by AI
Cloud PBX, business SMS, and AI voice agents in one platform — with AI that runs in your own region, so your conversations and data remain sovereign and in your control.
Cloud PBX · Business SMS · AI Voice Agents
$0 today, cancel anytime — Get started in minutes.
Everything your business needs to communicate
Three purpose-built products. One unified platform.
No hardware required.
Nova
Cloud PBXEnterprise phone system with AI-powered call routing, call recording, voicemail transcription, auto-attendants, and unified communications for teams of any size.
Auto-AttendantCall RecordingHD VoiceSTIR/SHAKENLearn moreFlare
Business SMSHigh-volume SMS & MMS marketing, 2-way messaging, campaign automation, and 10DLC compliance built for enterprise messaging at scale.
Learn moreAura AI
AI Voice AgentsAI voice agents that answer and resolve calls, plus call intelligence on every conversation — with human-in-the-loop safety. Auto-included with every paid Nova or Flare plan.
Learn more
AI that runs your business communications
Not just AI-assisted — AI-directed, AI-supported, AI-controlled. No technical knowledge required. Just say what you want.
Speak naturally, build instantly
Describe what you need in plain English — SARA configures your phone system in seconds. Complex call routing, IVR menus, and voicemail greetings — all by conversation.
"Set up a call menu for sales and support"
Done! Your IVR menu is configured.
100+ voices across 10 languages
English, French, Spanish, Hindi, Italian, Japanese, Portuguese, Chinese, and more. Plus voice cloning to sound exactly like your brand.
It understands every conversation
Transcription, speaker diarization, sentiment, AI summaries, and NLP intent run on every call — so you can search by meaning, spot trends, and coach from real conversations.
Your AI never leaves your region
The intelligence is built into your phone system — not bolted on, and never handed off to a third-party model. It lives where your calls and messages do.
AI Voices
Languages
AI Agents
Call-Intel Signals
Their AI is a third party. Ours isn’t.
Bolt-on AI platforms route every call through a third-party model in someone else’s cloud. We build the intelligence into the phone system itself — so it runs in your region, and your conversations never leave it.
Everyone else
Bolt-on AI
- Every call detours to an outside model — added processing delay
- Your conversations leave your region to a vendor’s cloud
- A chain of sub-processors to vet, disclose & trust
- Outages, rate limits & pricing you don’t control
SIPSTACK
Native AI
- The AI lives in the call path — no extra hop
- Conversations never leave your region
- No third-party model. No sub-processors.
- One provider, one platform — entirely yours
Built for every industry and use case
Whether you're running a contact center, sales team, or remote operation—SIPSTACK adapts to your workflow.
Powerful telecom tools built for every business
From startups to enterprises, SIPSTACK delivers enterprise-grade voice infrastructure without the complexity.
Seamless integrations
Native CRM, helpdesk & collaboration integrations — Salesforce, HubSpot, Zendesk, Slack — plus Zapier and webhooks to connect everything else.
Real-time analytics + call insights
Monitor calls, track metrics, and optimize performance in real-time.
Global coverage & local presence
Local phone numbers across the US & Canada.
AI-powered routing
Intelligent call routing that learns and adapts.
100+ AI voices
Choose from 100+ lifelike AI voices across 10 languages. From warm and professional to energetic and friendly.
AI Voice Studio
Clone your voice, choose from 100+ AI voices, and deploy custom branded voices across your phone system.
Get started in 4 simple steps
Create your account
Sign up in minutes, choose your plan, and get instant access to Switchboard — your unified command center.
Set up your team
Add users, assign extensions, and configure permissions. SARA guides you through every step with natural language.
Choose your AI voice
Select from 100+ AI voices across 10 languages. Clone your own voice for a truly branded experience.
Start AI-powered communication
Go live with AI voice agents, SMS campaigns, and intelligent call routing — all managed by AI, 24/7.
Build on the only voice-AI stack that owns its own carrier layer
One clean REST API and SDK for voice, SMS, numbers, and AI agents — running on a Tier-1 carrier network we operate end to end. No third party sits between your code and the network.
Your calls, messages, and AI stay in your region
US + Canadian data residency · in-region media storage · TLS 1.3 + AES-256 encryption · native AI — never handed to a third-party model.
Platform reliability and capabilities
99.95%
Voice / PBX uptime
Per published SLA
99.9%
SMS delivery
To carrier networks
99.5%
AI availability
Aura & SARA
25
Integrations
CRM, helpdesk & more
10
Languages
Voice & messaging
Ready to reimagine your business communications?
$0 today · Set up in minutes · Cancel anytime
Cloud PBX · Business SMS · AI Voice Agents — one platform
