Calisto Voice

One phone system. One user to a full call center.

A business number and voicemail for a solo operator. Extensions and ring groups for a small team. Call flows and queues for a growing operation. Supervisor monitoring with whisper and barge for a call center. AI receptionist with automated booking. Call recordings, transcription, and call tracking with source attribution. Same product, 531 global destinations, turn on what you need.

531 Destinations · Extensions · Ring Groups · Call Flows · Queues · Supervisor · Whisper/Barge · AI Booking · Recordings · Transcription

Start Here

A business number. Calls in and out. Voicemail. That's it.

Get a business phone number. Make and receive calls from the browser or your phone. Voicemail catches what you miss. Call logs track everything. That's the starting point — a clean, professional phone line for your business. No PBX knowledge required. No hardware.

Calls

Inbound and outbound calls from the browser. Call history with duration, direction, and outcome. Missed call notifications.

Business Numbers

Local numbers, toll-free numbers, international numbers. Buy a new number or port your existing one with the porting wizard.

Voicemail

Voicemail inbox with playback, transcription, and notification. Custom greetings. Voicemail-to-email delivery.

Voicemail Drop

Pre-recorded messages you can drop into voicemail without waiting for the beep. Record once, use for outbound campaigns.

Call Log
DirectionContactNumberDurationStatus
InboundMaria Rodriguez+1 (305) 555-01423:42Completed
OutboundRobert Chen+44 20 7946 09587:15Completed
MissedUnknown+1 (212) 555-01990:00Voicemail
InboundLisa Park+1 (415) 555-01735:08Completed

Masked Calling

Call from your business number without revealing your personal number. For agents, delivery drivers, and anyone making calls from a personal device.

Local Presence

Automatically display a local number matching the area you're calling. Increase answer rates for outbound calls.

Call Logs

Complete call history with timestamp, direction, duration, caller, and outcome. Filter by date, number, or team member.

Add Your Team

Extensions. Ring groups. Routing rules. A phone system that grows with you.

When your team grows past one person, Voice becomes a phone system. Four extension types — user, department, shared line, and voicemail-only. Ring groups with five strategies to distribute calls across your team. Routing rules that send calls to the right person or department based on time of day, caller ID, or dialed number. Conference calling for group conversations.

User

Personal line for an individual team member

Ext 101

Department

Sales, support, or any team group

Ext 200

Shared Line

Reception desk, shared across multiple users

Ext 300

Voicemail-Only

After-hours or record-only, no live agent

Ext 900

5 Ring Strategies

1
SimultaneousAll phones ring at once
2
SequentialOne after another in defined order
3
Round RobinFair distribution across members
4
Least RecentThe person who hasn't taken a call longest
5
WeightedConfigurable priority per member

Routing Rules

Route incoming calls based on time of day, day of week, caller ID, dialed number, or department. Priority-ordered rules with first-match logic.

Transfer Rules

Warm transfer, blind transfer, and attended transfer. Transfer to extension, ring group, voicemail, or external number.

Conference

Multi-party conference calls. Dial-in number with PIN. Moderator controls — mute, remove, recording.

Callbacks

When a caller can't get through, they can request a callback. The system queues the callback and notifies the next available agent.

Scale Up

Visual call flow editor. Queues with hold music and position announcements. SLA thresholds.

When a team outgrows ring groups, call flows and queues take over. The visual call flow editor is a drag-and-drop canvas — no code. Route calls through IVR menus, time-of-day splits, and agent queues. Queues hold callers with music and position announcements. SLA thresholds trigger overflow rules when wait times exceed targets.

Route Every Call

Visual call flow editor. Call queues with hold music and position announcements.

When your call volume outgrows ring groups, call flows and queues take over. The visual call flow editor lets you build routing logic by dragging and connecting nodes — greetings, menus, time checks, queue routing, voicemail fallback — no code required. Call queues hold callers in line with estimated wait time, position announcements, and hold music. Queue editors configure priority, overflow, and SLA thresholds.

Call Flow Editor
Inbound Call
Business Hours?
Play Greeting
Gather Input
Press 1: Sales
Press 2: Support
Press 3: Voicemail
Outside business hours →
After Hours

Call Queue Engine

Position Announcements

Callers hear their position in the queue at configurable intervals. Estimated wait time updates automatically.

Hold Music

Custom hold music and periodic announcements. Upload audio or select from the built-in library.

Priority Routing

VIP callers, return callers, or tagged contacts routed ahead of general queue entries.

Queue Overflow

When wait time exceeds threshold, calls route to another group or voicemail. Configurable SLA thresholds per queue.

Queue Dashboard
QueueWaitingAvg WaitLongestAgentsSLA
Sales21:122:34494%
Support53:085:45382%
Billing00:00-298%
Call Center

Live agent monitor. Listen, whisper, barge. SLA management. Call quality scoring.

The supervisor floor is the call center command surface. A live board showing every agent, their status, and their current call. Listen to a live call silently. Whisper coaching to the agent without the caller hearing. Barge into the call as a third participant. SLA management with breach alerts. Call quality scoring with MOS, jitter, and packet loss. Call analytics and transcription.

The Supervisor Floor

Listen. Whisper. Barge. Every call monitored in real time.

For operations running a front desk, a reservation line, a support team, or a full call center. The supervisor floor shows every active call, every agent's status, and every queue — in real time. Three monitoring modes let supervisors coach without the caller knowing, or jump into the call when needed. SLA tracking catches breaches before they become complaints. Quality scoring rates every call.

Supervisor Console
AgentStatusDurationCaller
Sarah K.on call3:42Maria Rodriguez
James M.available--
Priya S.wrap up0:28-
David L.on call7:15Robert Chen
Emma W.away--
Carlos R.available--

Monitoring Modes

ListenSilent monitoring. The supervisor hears the call. Neither the agent nor the caller knows.Quality assurance and training.
WhisperThe supervisor speaks to the agent. The caller doesn't hear.Real-time coaching during a difficult call.
BargeThe supervisor joins the call. Everyone hears.Escalation, support, or closing a deal together.

Live Monitor

Real-time grid of all active agents. Status: available, on call, in wrap-up, offline. Current call duration. Queue stats. 30-second refresh.

Live Assist

Real-time guidance pushed to the agent's screen during a call. Prompts, scripts, and suggested responses without voice interruption.

SLA Management

Define SLA targets per queue — maximum wait time, maximum ring time, abandonment rate threshold. Breach alerts fire to supervisors and managers in real time.

Call Quality

Per-call quality scoring — MOS (Mean Opinion Score), jitter, packet loss. Identify calls with poor audio quality. Track quality trends over time.

Call Analytics

Call volume, average handle time, first-call resolution, peak hours, agent performance. KPI dashboard with date range filters.

Call Tracking

Source attribution for inbound calls. Track which marketing channel, campaign, or landing page generated the call. Four attribution parameters.

Transcription

Call recordings transcribed to text. Searchable. Reviewable. Available after the call ends. For compliance, training, and quality review.

Global Coverage

531 destinations. Local numbers in the markets you serve.

Call anywhere. 531 global destinations with competitive per-minute rates. Buy local numbers in the countries where your business operates — your customers see a local number, not an international one. Port your existing numbers with the porting wizard. eSIM support for mobile devices.

Latin America

Brazil, Mexico, Colombia, Argentina, Chile, Peru, and 30+ more. Local numbers available in major markets.

Africa

Nigeria, South Africa, Kenya, Ghana, Egypt, and 40+ more. Competitive per-minute rates across the continent.

Europe

UK, Germany, France, Spain, Netherlands, and 40+ more. Local and toll-free numbers in every major market.

Asia-Pacific

Australia, India, Japan, Singapore, Philippines, and 30+ more. Local presence in key business hubs.

Local Numbers

Buy local numbers in the countries where your business operates. Your customers see a local number, not an international one.

Number Porting

Port your existing numbers with the porting wizard. Status tracking from submission through carrier confirmation.

eSIM Support

eSIM provisioning for mobile devices. Business calling from anywhere without a second SIM card.

Competitive Rates

531 global destinations with per-second billing. No rounding, no minimum call duration.

Everything. One Price.

Calling. Phone system. Call flows. Supervisor floor. 531 destinations. AI booking.

Calling

Inbound and outbound calls, business numbers, voicemail with transcription, voicemail drop, masked calling, local presence, call logs, number porting.

Phone System

Four extension types, ring groups with five strategies, routing rules, transfer rules, conference calling, callbacks.

Call Flows & Queues

Visual call flow editor (drag-and-drop, no code), call queues with hold music and position announcements, queue overflow, SLA thresholds.

Supervisor Floor

Live agent monitor, listen/whisper/barge, live assist, SLA management with breach alerts, call quality scoring (MOS, jitter, packet loss), call analytics, call tracking with source attribution, transcription.

Global Coverage

531 destinations, local numbers, toll-free numbers, international numbers, number porting, eSIM support.

Webhooks

Eight webhook event types for integrating call events with external systems.

Platform Integrations

Contacts (caller ID resolution pre-answer), Deals (call activity on deal timeline), Calendar (scheduled calls), Inbox (missed call notifications), Ops (call-triggered tasks), Signal (eSIM management).

AI Booking

AI receptionist that answers calls, collects caller information, checks availability, and books appointments automatically.

Recordings

Call recording library with browse, search, and playback. Manager-gated access.

Pricing

Free team calling. External at per-minute rates.

Internal calls are always free via LiveKit. External calling through DIDWW with no minimums or commitments.

Calisto Core
$0/month
+ 2% of revenue
CommitmentNone
UsersUnlimited
Products15 included
Best for: Any team that needs a phone system — from solo operators to multi-property contact centers.
Calisto Voice

Phone system from one user to a full call center with 531 global destinations.

$1.00/mo

Part of Work Suite

Billed monthly to your Pro Shop wallet

Add to Pro Shop