Voice AI thatsounds human.
Build and deploy voice agents that handle real conversations: inbound, outbound, and everything between.
24/7
Call handling
60+
Languages
Built and managed for you
See an agent handle real calls.
A live conversation on the left, the agent's console on the right.
Inbound
A call is one of five doors in.
A call the agent answers lands in the same inbound queue as every other route in. Whoever is on it works one list rather than checking five places.
Voice agents
Somebody rang your number, or pressed the call button on your website. The transcript, the summary and what they actually wanted come with it.
Booking links
They booked a slot themselves, so the enquiry and the appointment arrive together.
Forms
A published form or one embedded in your own site. Every answer they gave is on the record.
An enquiry that arrived in the inbox, read and filed like the rest rather than sitting unread.
Webhooks
Anything else that can make an HTTP request: a portal, a marketplace, a chat widget, your own software.
One script on your website
Drop the embed on your site and a visitor gets a call button, a chat launcher, or both from the same launcher. Set the label, the position and the colour to match your site. Configure neither and it renders nothing at all.
- Call button
- Chat launcher
- Your label
- Your position
- Your colour
Each channel is yours to name, colour and order. Rename one and nothing about how it behaves changes.
Everything included
Voice is the front door. The platform comes with it.
Everything below is in your account from day one, built in and switched on, with no separate service to buy or connect. This is what you get for your money.
Voice & calling
A number, live in minutes
Rent a Sysevo number from $3/month or forward the line you already use. Either way, no porting paperwork, just a working agent.
Or bring your own carrierCommand+
Connect Twilio, Telnyx, Vonage, Plivo, Cloudonix or Vobiz in a few clicks, or self-host over SIP through Asterisk if you run your own telephony.
Two ways to build an agent
A guided simple view for straightforward setups, or a full visual workflow editor with branching logic and conditions. Same agent, whichever view you use.
Full control over behaviour and voice
Tune personality, speaking pace and interruption sensitivity, and pick the model behind it: OpenAI, Claude, Gemini or Grok.
6,000+ voices to choose from
Browse the full voice library by accent, age, gender and use case, or reuse a voice you have already saved.
Voice cloningGrowth+
Upload a short sample and your agent speaks in that voice. A founder’s, a brand ambassador’s, whoever you choose.
Tools and knowledge bases, mid-call
Give an agent documents to search and custom tools it can call out to, so it can act on real information while the caller is still on the line.
Outbound campaigns with real retry logic
Batch-dial a list and set exactly what happens on no answer, busy or voicemail, with automatic recalls with a delay and a retry cap you control.
Watch the calls happening now
A realtime board of every call in progress, with the transcript scrolling as it is spoken, so you can step in rather than read about it afterwards.
Callbacks, scheduled rather than remembered
Anyone who asked to be rung back is queued automatically, or filed for review first if you would rather approve them.
Dispositions, and a suppression register
What actually answered each number, from a person to a voicemail to a dead line, feeding one register of numbers that must not be dialled again.
Every call recorded and transcribed
Follow a call’s transcript live, or come back to the recording and full transcript afterwards.
Every call analysed
Automatic conversation analysis on every call, plus up to 15 custom fields you define for your industry.
Live scoring and sentimentGrowth+
Every call scored and read for sentiment as it happens, not just summarised afterward.
The agent acts, not just talks
Book an appointment, send an email, take a payment, create a task or send a form, queued the moment a call is analysed, with your approval where it reaches the caller.
A real voice call, embedded on your site
Not a chat bubble. A live voice widget with an audio-reactive interface, dropped straight into your website or app.
REST API and an MCP server
Build against a full REST API, or connect an MCP server directly to Claude Code, Cursor, Claude Desktop or Zed.
Pay-as-you-go, on your terms
A wallet that tracks plan minutes and top-up minutes separately, with auto-recharge if you want it and billing you can see into at any time.
No add-ons, no second subscription, nothing to wire together yourself. It is one platform and one bill. Everything unmarked is on every plan; a handful of the heavier modules open up further up the tiers, and those are marked above. See what each plan includes.
This is the part of the platform this page is about. See everything else it comes with.
Live demo
Talk to a live AI agent.
Pick an agent type and call. No signup, no download.
Alex
Hotel Concierge
Capabilities
Live stats
99.2% answered
Call Alex
Hotel Concierge
Browser-based · No account needed · Free
No account needed · Works in your browser · Free to try
Capabilities
Everything a phone agent needs.
Inbound and outbound, with memory, tool calling, and multi-language support built in. Not a chatbot on a phone line. A real AI agent built for voice.
Build your first agentInbound calls
Never miss a customer call. Your agent answers instantly, 24/7, in any language.
Outbound campaigns
Upload a contact list. Your agent calls everyone. You review results in real time.
Voice cloning
Train a custom voice that sounds like your brand, or a specific team member.
70+ languages
Serve customers worldwide without hiring multilingual staff.
Caller memory
Every returning caller is recognised by phone number. Name, history, and preferences, surfaced before they speak.
Low latency
Under 800ms to first word. Natural, human-paced conversation. No awkward pauses.
Tool calling
Book appointments, update records, check availability, in real time during the call.
Human escalation
When the agent can't help, it transfers seamlessly. The caller never knows they were on hold.
The Agent Editor
Every detail of your agent, in one place.
Configure voice, personality, memory, tools, and AI model without writing a single line of code.
Tools & Integrations
Your agent takes action. During the call.
Eight tools, five active by default and three advanced, let your agent book, look up, transfer, send and respond without any human intervention. Connect your existing CRM, calendar, and communication tools in minutes.
CRM
Calendar
Messaging
Google Calendar, Outlook, Calendly, or custom API. Agent checks availability and books in real time during the call.
Pull the caller record from HubSpot, Salesforce, Pipedrive, or any API, before they say a word.
Semantic search across your PDFs, docs, and web pages. Agent answers questions directly from your content.
Transfer to a human agent or number. Set trigger conditions in natural language. Caller stays on the line.
Send confirmation, links, or follow-ups during or after the call. Fully templated with caller variables.
Post-call email to the caller, an internal address, or both. Triggered automatically on call end or custom conditions.
Call any external endpoint mid-conversation. Pass caller data and use the response to continue the call.
Write a JavaScript function that runs during the call. Full access to call state, transcript, and memory.
Workflow Editor
Program complex call logic, visually.
Not every call is simple. Branch on caller intent, route by customer type, fire tools in sequence.
Live preview: a vet practice call routing through memory lookup, CRM retrieval, appointment booking, and SMS confirmation.
Your agents don't forget.
Every caller is recognised by their phone number. No accounts, no logins. Just instant, personal service from the first word.
Recognised by
Phone number
No login required from the caller
Memory survives
Agent updates
Remembers even if you rebuild the agent
GDPR
Deletion on request
Verbal or API-triggered deletion
Compliance
Calling at scale, without the risk.
Outbound calling has real regulatory teeth. Do-not-call enforcement, data residency, and erasure aren't settings you have to remember to configure. They're how the platform works by default.
Across every industry
Built for the way your industry actually works.
Hospitality
Hotel Concierge
"Aria handles the inbound line. Reservations, room service, concierge, all resolved without staff involvement."
Healthcare
Medical Receptionist
"Clara books appointments, handles prescription enquiries, and routes urgent calls, without a single dropped call."
Recruitment
Candidate Screener
"Marcus runs first-call screening 24/7. Qualified leads land in the CRM with structured notes before the hiring manager starts their day."
Real Estate
Lead Qualifier
"Sam qualifies inbound enquiries, books viewings, and updates the CRM in real time, converting traffic while the team focuses on closing."
Hospitality · Healthcare · Recruitment · Real Estate · Financial Services · Retail · Legal · Logistics and more
Custom solutionsPowered by the best models.
All inference is managed for you, with every provider included. No API keys, no surprise bills.
OpenAIOur recommended model
Faster · Lower cost
Advanced reasoning
AnthropicMost capable
Best for nuanced conversation
Faster · Excellent quality
GoogleBest for multilingual calls
Fast & highly capable
Ultra-fast response times
Best-in-class reasoning
Fast · Cost-efficient
Speech to Text
WhisperLarge v3Text to Speech
ElevenLabsTurbo v2.5Telephony
Built for production
Enterprise-grade infrastructure.
< 800ms
First response
24/7
Always-on infrastructure
70+
Languages
∞
Concurrent calls
Call Intelligence
Every call. Automatically scored.
The moment a call ends, Sysevo grades it across five dimensions. No manual review, no spreadsheets. Your quality data is ready before your team starts their day.
Resolution
Did the agent fully resolve the caller's intent, or leave it open?
Sentiment arc
Tracks how caller emotion shifts across the conversation, word by word.
Prompt adherence
Did the agent stay within its instructions, tone, and compliance constraints?
Response latency
Measures time from end of caller utterance to start of agent response.
Outcome tag
AI classifies every call against 25 dispositions: booked, qualified, callback requested, gatekeeper, voicemail, do not call and the rest.
Call Outcomes
Every call ends with a disposition.
The agent classifies the outcome of every call automatically, so your pipeline reflects reality without anyone tagging calls by hand.
Booked
Appointment or callback scheduled, and it moves straight into your calendar and CRM.
Qualified
Caller met the qualification criteria on the call, and the record says so without anyone tagging it.
Callback requested
Caller asked to be called back at a specific time, queued automatically.
No answer / voicemail
Call went unanswered or to voicemail, so it is eligible for an automatic retry.
Not interested
Caller declined. Lead is deprioritised, not deleted, so you keep the record.
Do not call
Caller asked not to be contacted again. Enforced automatically, every future call.
Automated Callbacks
A missed call isn't a lost one.
Set exactly what happens when a call goes unanswered. A busy signal, no answer, or voicemail can all trigger an automatic retry, on your terms.
Max retries
How many times a missed call gets attempted again
Retry delay
How long to wait before the next attempt
Retry on
Choose exactly which outcomes trigger a retry
Once a caller marks "do not call," retries stop for that number, permanently, with no override required.
How a spoken time becomes a booked callbackDeployment
Four ways to deploy.
One platform.
Inbound
Answer every call, 24/7, without staff.
- 1Buy or port a phone number
- 2Assign your agent
- 3Go live instantly
Outbound
Reach hundreds of leads while you sleep.
- 1Upload your contact CSV
- 2Configure the campaign
- 3Review results in the CRM
Web Widget
Let website visitors talk to your agent.
- 1Copy one line of code
- 2Paste it in your website
- 3Live in seconds
API
Integrate voice into any workflow.
- 1Get your API key
- 2Call /v1/calls endpoint
- 3Full programmatic control
Getting the number itself is the easy part. Buy one in minutes, or forward the number you already advertise.
For developers
Full REST API.
Any LLM.
Build voice AI into any product. Use our REST API to start calls, process webhooks, and query call data, in any language or framework.
# Start an outbound call
curl -X POST https://api.sysevo.io/v1/calls \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{
"agent_id": "agt_hotel_concierge",
"to": "+447700900142",
"metadata": { "booking_ref": "BK-8842" }
}'One platform
Everything included. Done for you.
LLM, speech recognition, voice synthesis and telephony. Your CRM, phone system and analytics, one connected system, built for you.
What people ask about AI phone agents
How they are built, what they can do on a call, and what a call actually costs.
An AI phone agent answers and makes calls in a natural voice, follows the flow you build, and acts on what it hears. In Sysevo you build one in either a guided simple view or a full visual workflow editor with branching logic, pick the model behind it from OpenAI, Claude, Gemini or Grok, choose a voice, and give it tools and knowledge bases it can use mid-call. It handles inbound and outbound on the same platform.
- 01How Much Do Voice Agents for Business CostWhat voice agents actually cost, the hidden expenses most buyers miss, and how to calculate true ROI with a worked example.Voice AI
- 02How to Evaluate Five9 for AI ReceptionistA practical buyer's checklist for testing AI receptionist platforms. What to measure in week one, questions to ask vendors, and red flags that should end a sales process.Voice AI
- 03What Voice AI Trends Should Your Business Watch Now?Voice AI is reshaping customer service. See what's shifting in conversational AI, where adoption is heading, and what matters to your operation.Voice AI