Automated user acquisition and engagement. Powerful analytics.

Broadcast automated, targeted and contextualized messages to your database for effective user acquisition and engagement all along the customer journey.

Generate online and in-store traffic at scale

Having a one-day sale? An event to promote? Easily generate online or in-store traffic. Automate and scale your campaigns, while keeping them personal with relevant variables like name, location, or any other data you have. Reach your audience via SMS or voice, or combine the two.

A price tag and a text message under it talking about a sale

Keep your customers engaged. Reduce churn.

Engage your users all along the funnel to make sure they don't churn. Notify them of product updates and new features, set meetings with customer success teams, or message them before their contract ends. Use SMS, voice, or combine both to reach the most people.

the user acquisition and engagement cycle

Detailed analytics to improve your current datasets

Whether you're acquiring users for your own business or someone else's, you can meticulously track the amount of leads you generate. Both our web interface and our API will help you qualify your databases: reports are built based on your directories. Preserve a flawless B2B customer experience with white label reporting.

a funnel representation the results of a call campaign

See how easy it is to start your campaigns online

The list of all your ongoing campaigns on the interface and their current status

Chose your recipients easily: upload an .xls file to our interface

Create a new SMS campaign an specify the basic options a few clicks.

Schedule campaign on specific days or timeline. Get reports on any email address

SENDR - Campaign listing SENDR - Chose target directories SENDR - New SMS Scheduling option

Streamline your communinications and stay in control

Telco Made Easy

Thanks to our API, we are democratizing telcos: you don't need to be a telco expert to thrive with it. We provide you with code samples, extensive documentation, and a reliable support team to help you achieve a faster go-to-market in your business comms projects.

Enterprise-Grade Service

Ensuring a reliable service is as critical for us as it for you; we take every step required to secure its continuity with exhaustive and automated monitoring processes. Should you need any help, you will promptly find a helpful, reactive and top-notch support team ready to jump in.

Shared Expertise

We have the resources and expertise to help you thrive with your any VoIP phone systems: SIP or IAX. As a carrier, we operate our infrastructure in Europe and an interconnection network with tier 1 carriers in the rest of the world: you don't have to worry about coverage or delivery.

Flexibility Through Ownership

CALLR operates its own platform, so you can to cut out unnecessary intermediaries: no more black boxes! Our infrastructure built using open source technologies lowers your cost of ownership and grants you full end-to-end control over your business communications.

All-in-one Telecom

Reach more than 220 countries with unparalleled call quality from a single service. Our API acts as your friendly and exhaustive helper to the world of telecoms: it facilitates your implementation of any service, including real-time call control, phone numbers, IAX, or call tracking.

End-to-end Business Comms

We have been involved as carriers for more than nine years. We're happy to leverage that experience for you, and it goes beyond the mere delivery of your messages: our mission is end-to-end communications.

Automate and contextualize your acquisition to grow your user base efficiently

I want to call/text in:

Voice (Billing is per second)

Inbound

$ /min

Number

$ /num/month

Outbound (landline)

$ /min

Outbound (mobile)

$ /min

SMS

Inbound

$ /sms

Outbound

$ /sms

Need high volumes? Bulk prices apply

Contact us for more information

Features to fit any user acquisition & engagement scenario

Go further with our API

From calls to texts to everything in between, according to your rules

With our API Integration, create 2-way SMS and calling experiences that fit your customers' privacy expectations and your data needs. We support all major coding languages: PHP, JavaScript (Node), Ruby, Python, Go...
Start calling or sending SMS now with our API or create campaigns in a flash with our web interface.

  • Send SMS (PHP)
  • MT SMS DLR (Python)
  • Make a call (JS)

Copied!

// composer require 'callr/sdk-php:dev-master' require 'vendor/autoload.php'; $api = new \CALLR\API\Client; $api->setAuthCredentials('login', 'password'); $from = 'Your Brand'; $to = '+33123456789'; $text = 'Hello, SMS world!'; $options = new stdClass; $options->force_encoding = 'GSM'; // or 'UNICODE' $options->nature = 'ALERTING'; // or 'MARKETING' $result = $api->call('sms.send', [$from, $to, $text, $options]);
// composer require 'callr/sdk-php:dev-master'

require 'vendor/autoload.php';

$api = new \CALLR\API\Client;
$api->setAuthCredentials('login', 'password');

$from = 'Your Brand';
$to   = '+33123456789';
$text = 'Hello, SMS world!';

$options = new stdClass;
$options->force_encoding = 'GSM'; // or 'UNICODE'
$options->nature = 'ALERTING'; // or 'MARKETING'

$result = $api->call('sms.send', [$from, $to, $text, $options]);
# pip install callr import callr api = callr.Api("login","password") options = {'webhook': {'endpoint': 'http://yourdomain.com/webhook_path'}} result = api.call('sms.send', 'SMS', '+16469820820', 'Hello SMS world! (with DLR pushed to an URL endpoint)', options)
# pip install callr

import callr
api = callr.Api("login","password")

options = {'webhook': {'endpoint': 'http://yourdomain.com/webhook_path'}}

result = api.call('sms.send', 'SMS', '+16469820820', 'Hello SMS world! (with DLR pushed to an URL endpoint)', options)
// npm install callr var callr = require('callr'); var api = new callr.api('login', 'password'); var target = { number: '+16469820800', timeout: 30 }; var messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call! good bye.']; api.call('calls.broadcast_1', target, messages, null).success(function(result) { // });
// npm install callr

var callr = require('callr');
var api = new callr.api('login', 'password');

var target = {
    number: '+16469820800',
    timeout: 30
};

var messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call! good bye.'];

api.call('calls.broadcast_1', target, messages, null).success(function(result) {
    //
});

CALLR’s API is very clear, and integration was quick and easy. We’ve never had any technical problems with CALLR.

Julien Balmont

Co-founder and CTO of Zenchef (PHP developer)