Voice & Phone
Answer inbound calls, replace the IVR, route intelligently, and execute tasks mid-call. Real-time speech-to-text with AI responses — 24/7 intelligent coverage.
AI Platform
AI voice agents and call intelligence
Aura answers and resolves calls with AI voice agents — then transcribes, diarizes, scores sentiment, summarizes, and tags intent on every conversation. Build agents in a visual flow builder, ground them in your knowledge base, and keep a human in the loop. Auto-included with every paid Nova or Flare plan.
99.95%Core Platform Uptime SLA
Sec Avg. Setup Time
100%In-Region AI Processing
InstantAI Assistance
Call Intelligence
Hears every call. Understands every word.
Aura turns each conversation into structured intelligence. Real-time transcription with speaker diarization shows who said what; sentiment, summaries, and NLP intent tell you what it meant — automatically, on every call.
Transcription & speaker diarization
Accurate, timestamped transcripts that separate each speaker — color-coded and labeled, so you can read a call like a script.
Sentiment & AI summaries
Per-segment and overall sentiment, plus a concise AI summary of the call — no listening to recordings to know what happened.
NLP intent, topics & keywords
Every call is tagged with its intent, topics, and keywords — the foundation for routing, reporting, and search-by-meaning.
Call Insights
See what's really happening
Aura aggregates the intelligence from every call into a picture of your operation — when calls happen, what they're about, and how they feel — so you can staff smarter and fix what keeps coming up.
Day-by-hour volume heatmap
Spot your real peak windows at a glance — staff for the Wednesday-morning rush, not a guess.
Ranked conversation themes
The topics driving your call volume, each with a sentiment breakdown, trend, and share — see what to fix first.
Search transcripts by meaning
Find every call about a billing dispute or outage — by intent, not by hoping someone tagged it.
Voice Agent Builder
Build a voice agent in minutes
Design the conversation visually. Drag nodes onto a canvas, connect them into the flow you want, and configure each step in the inspector — no code, no model training.
Say, Collect, Converse, Transfer
Compose flows from real building blocks: speak text, gather speech or DTMF, run multi-turn AI, or hand off to a person.
Knowledge-grounded answers
The Converse node answers from your knowledge base with RAG — grounded, cited responses instead of made-up ones.
Human-in-the-loop by design
A Transfer node hands any call to a person, and confidence thresholds escalate automatically when the AI is unsure.
Hear the voices your agent can use
Browse 60+ natural AI voices, filter by gender and accent, and preview a sample of each — then pick the one that fits your brand.
Agent Insights
Measure every agent
Know exactly how your voice agents perform. Calls handled, completion and transfer rates, average duration, and the AI minutes used — at a glance, every day.
The metrics that matter
Calls, completed %, transfer rate, and average duration — the numbers that tell you whether your agent is working.
Usage in plain dollars
See AI minutes consumed against your included allowance — at $0.12 USD / $0.15 CAD per minute beyond it — so spend is never a surprise at invoice time.
Daily trends
A rolling view of call volume per day — catch shifts in demand before they catch you.
Plain-English billing
What is an Aura credit?
One unit, end to end: a voice-agent minute. Your paid plan includes a monthly allowance of these minutes — Nova Pro: 5 per seat/month, Nova Ultra: 25 per seat/month (Core has none). The included allowance is used first and resets each billing period. Beyond it, minutes draw from a prepaid Aura balance you top up in advance at $0.12 USD / $0.15 CAD per minute — debited from that balance, never added to your monthly invoice. Prepaid credits never expire, and the balance is separate from your plan subscription: neither can pay for the other.
Worked example — a 10-seat Nova Pro team
- Included allowance: 10 seats × 5 min = 50 voice-agent minutes/month, free with the plan.
- Say the team uses 120 minutes one month. The first 50 are covered; the remaining 70 minutes draw from the prepaid balance.
- 70 min × $0.12 USD = $8.40 USD (C$10.50) from your prepaid balance — and $0 added to your invoice.
Voicemail transcription is always free. Call-recording transcription and premium text-to-speech draw from the same per-minute balance; sentiment, AI summaries, and RAG are bundled at no charge on Ultra. A volume discount applies from 501 minutes/month.
Channels
One AI engine. Every channel.
SMS & Messaging
Reply to text messages, run conversational workflows, send confirmations. Two-way messaging with intent detection — customers get answers, not auto-replies.
Email, Chat & Webhooks
Process email inquiries, embed chat in your portal, trigger from CRM events or webhooks. One AI engine, every channel — limitless integration potential.
Features
AI that understands, acts, and learns
Conversational intelligence meets skill execution. Natural language requests trigger real actions — safely, with your permission model enforced at every step.
Conversational AI with Intent Detection
Understands natural language — no scripted menus. Detects caller intent, handles follow-up questions, and switches context mid-conversation across voice and chat.
Action-Executing Skills
Pre-built skills create extensions, reset passwords, check porting status, and run billing lookups. YAML-defined and permission-gated — deploy new skills without model retraining.
Knowledge-Grounded Answers (RAG)
Hybrid vector + full-text search across your knowledge base with reranking. Answers cite their sources, and the agent pulls knowledge live, mid-call.
Human-in-the-Loop Safety
Write operations require confirmation before executing. AI proposes, you approve. Confidence-based routing escalates to a person when certainty drops below your threshold.
Permission & Subscription Gating
Respects user roles, org-level skill control, and subscription-tiered access. The AI never executes an action the user is not authorized for — enforced at the skill layer.
Regional AI Processing
AI inference runs in your region — US customers on US servers, Canadian customers on Canadian servers. Your conversations and data never leave your jurisdiction.
Try it live
Call it. Try to break it.
Pick your industry and we'll email you a number to call. Interrupt it, change your mind, ask the hard question — Aura is a live AI agent, and we'd rather you test it than trust us.
- We email you a number — call it from any phone
- Talk naturally — ask it to book, take a message, or qualify a lead
- A recorded AI demo, with in-region inference
1. What should the agent be?
Aura is auto-included with every paid Nova or Flare plan.
Full Demo
Hear SARA in Action
Listen to how SIPSTACK uses AI Voice Agents to handle support calls. Watch SARA help a customer reset their password while integrating with CRM in real-time.
Real-Time Sentiment
NegativeNeutralPositive
0
Sentiment Score
0:001:50
Conversation Transcript
“Hello, thank you for calling SIPSTACK.”
0:00
“I'm SARA, an AI Voice Agent here to help. All of our human agents are currently assisting other customers, but I'm happy to assist you.”
0:02
⚡Checking CRM for caller's phone number...
“I don't recognize your phone number. This must be your first time calling us. Can I get your name?”
0:12
C
“My name is Tony.”
0:18
✓Name captured: Tony
“Nice to meet you, Tony.”
0:21
“What company are you calling from?”
0:23
C
“I'm calling from Pied Piper.”
0:25
✓Company captured: Pied Piper
“Got it. Pied Piper.”
0:28
“And could I get your email address, so I can look up your account?”
0:31
C
“Sure, it's tony at pied piper dot com.”
0:35
✓Email captured: [email protected]
“Great, I have what I need.”
0:39
⚡Searching CRM by email...
“Tony, I actually found a contact record with your email. I just didn't have your phone number on file.”
0:42
⚡Updating phone number in CRM...
“I've gone ahead and updated that for you.”
0:49
“I have your account open. How can I help you today?”
0:52
C
“Great, that was cool. I'm calling because I can't log in to pay a bill. I tried resetting my password but it's not working.”
0:56
⚠Issue: Password reset not working
“I'm sorry you're having trouble logging in. I can help with that.”
1:05
“Let me send you a link to reset your password right now.”
1:10
⚡Sending password reset email...
“That's on its way to your inbox now. Did you get it?”
1:14
C
“Yeah, just came in. I'm resetting now. Thanks!”
1:17
“Is there anything else I can help you with? Or would you still like to speak to a human agent? I can open a ticket or transfer you to the queue.”
1:23
C
“I'm logged in now, you resolved my issue, no need to transfer, thank you!”
1:32
✅Issue resolved - no escalation needed
“Fantastic! Thank you for calling, Tony. If you have any other issues, feel free to call or email us anytime.”
1:38
C
“Thank you.”
1:46
“Have a great rest of your day.”
1:48
✅Call ended
Ready to set up an AI Voice Agent for your business?
Analysis
Intent
Waiting
Confidence
0%
Response Time
1.2s avg
Session Stats
Segments0 / 24
SARA responses0
Escalated0
Why Aura
AI that works within your rules
Most automation breaks permission models and data policies. Aura enforces your access controls, runs in your region, and never acts without confirmation — while turning every call into intelligence you can act on.
Understands every call, not just keywords
Transcription, diarization, sentiment, summaries, and NLP intent run on every call — so you can search by meaning, spot trends, and coach from real conversations.
Respects your permission model
Role-based, subscription-gated, org-controlled. Aura agents inherit and enforce your existing access controls — no separate permission layer to maintain.
Gets smarter from your knowledge
RAG grounded in your documentation. As your knowledge base grows, the agent gets smarter — no retraining, no model updates. Just add articles.
Runs in your region
AI processing stays in your jurisdiction — US data on US infrastructure, Canadian data on Canadian infrastructure. Data sovereignty by default.
Getting Started
Live in days, not months
Most deployments go from configuration to production in under 24 hours.
1
Get a Nova or Flare plan
Aura is auto-included with any paid Nova or Flare subscription — no separate sign-up, no add-on fee. Already a customer? Aura is already on.
2
Build your agent and add knowledge
Drag Say, Collect, Converse, and Transfer nodes into the flow builder, upload knowledge articles, and set your persona and confidence thresholds.
3
Go live and measure
Deploy across voice, chat, email, and SMS. Every call is transcribed, analyzed, and summarized automatically — and agent performance shows up in insights.
FAQ
Frequently asked questions
What is Aura — voice agents, or call intelligence?
Both. Aura is SIPSTACK's AI layer. It includes AI voice agents that answer calls and execute real tasks, plus a full call-intelligence suite that runs on your calls: transcription, speaker diarization, sentiment analysis, AI call summaries, NLP intent and topic detection, and knowledge-grounded (RAG) answers. The same platform powers both — the voice agent talks to callers, and the intelligence suite tells you what happened on every call.
What channels do Aura agents support?
Aura works across voice (Nova PBX, Asterisk), SMS (Flare), email (IMAP/SMTP), web chat (Switchboard portal), and REST API / webhooks for custom integrations. The same agent definition works across all channels — one configuration, every channel.
How does the visual flow builder work?
Voice agents are built on a drag-and-drop canvas. You connect nodes — Say (speak text), Collect (gather speech or DTMF), Converse (multi-turn AI grounded in a knowledge base), Transfer (hand off to a person), HTTP (call an external system), and Branch (conditional routing) — into the conversation flow you want. A node inspector lets you configure each step (knowledge base, max turns, guardrails) without writing code.
What does the call-intelligence suite actually capture?
Every analyzed call gets a full transcript with speaker diarization (who said what), per-segment and overall sentiment (positive / neutral / negative), a concise AI summary, and NLP-detected intent, topics, and keywords. Call Insights then aggregates this across all calls into a day-by-hour volume heatmap and ranked conversation themes with sentiment and share — so you can search transcripts by meaning and see what your calls are really about.
How is Aura priced?
Aura is auto-included with any paid Nova or Flare plan — no separate subscription, no add-on fee. Each plan includes a monthly AI allowance that scales with your team: Nova Pro includes 5 voice-agent minutes per seat per month, Nova Ultra includes 25 per seat per month, and Nova Core has no monthly allowance. The included allowance is used first and resets each billing period. Once it's used up, AI usage is funded from a prepaid Aura balance you top up in advance — it is debited from that balance and is never added to your monthly invoice as overage. Voice-agent minutes draw at $0.15 CAD / $0.12 USD per minute, with a volume discount at 501+ minutes/month. Voicemail transcription is free on every plan. Call recording transcription and premium text-to-speech draw from your Aura balance like voice-agent minutes; sentiment, AI summaries, and RAG knowledge-base answers are bundled at no charge when your plan includes the entitlement. The prepaid Aura balance is a separate billing instrument from your plan subscription, and prepaid credits never expire.
What is SARA, and how does it relate to Aura?
SARA is SIPSTACK's own deployment of Aura. We use Aura internally across our support chat, phone lines, email, and SMS — SARA is the persona we give our AI assistant. Think of SARA as proof in production: a real Aura deployment handling thousands of interactions. When you buy Aura, you get the same platform that powers SARA.
Where does AI processing happen?
AI inference runs on SIPSTACK's dedicated infrastructure within your region — US customers on US servers, Canadian customers on Canadian servers. Your conversations, customer data, and knowledge base never leave your jurisdiction. No third-party AI API calls for inference. If you have compliance or data-sovereignty requirements, this matters.
How does human-in-the-loop safety work?
Every write operation (creating an extension, resetting a password, modifying a configuration) requires explicit confirmation before executing. The AI proposes the action, shows exactly what it will do, and waits for approval. Confidence-based routing means low-confidence responses escalate to a human rather than guessing, and a Transfer node can hand any call to a person at any point. You set the thresholds.
Get Started
AI voice agents and call intelligence — included
Aura is auto-included with every paid Nova or Flare plan. AI voice agents, a visual flow builder, transcription, diarization, sentiment, summaries, NLP intent, and knowledge-grounded answers. Regional AI processing. Human-in-the-loop safety. Pay only for what you use beyond your plan's included AI minutes.
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