diff --git a/assets/js/src/ajax.js b/assets/js/src/ajax.js
index 06a2c86a6b..adc251e1e8 100644
--- a/assets/js/src/ajax.js
+++ b/assets/js/src/ajax.js
@@ -13,13 +13,13 @@ define('ajax', ['mailpoet', 'jquery'], function(MailPoet, jQuery) {
         onError: function(xhr, textStatus, errorThrown) {}
       },
       get: function(options) {
-        this.request('get', options);
+        return this.request('get', options);
       },
       post: function(options) {
-        this.request('post', options);
+        return this.request('post', options);
       },
       delete: function(options) {
-        this.request('delete', options);
+        return this.request('delete', options);
       },
       init: function(options) {
         // merge options
@@ -46,18 +46,18 @@ define('ajax', ['mailpoet', 'jquery'], function(MailPoet, jQuery) {
           endpoint: this.options.endpoint,
           method: this.options.action,
           data: this.options.data || {}
-        };
+        }, jqXHR;
 
         // make ajax request depending on method
         if(method === 'get') {
-          jQuery.get(
+          jqXHR = jQuery.get(
             this.options.url,
             params,
             this.options.onSuccess,
             'json'
           );
         } else {
-          jQuery.ajax({
+          jqXHR = jQuery.ajax({
             url: this.options.url,
             type : 'post',
             data: params,
@@ -69,6 +69,8 @@ define('ajax', ['mailpoet', 'jquery'], function(MailPoet, jQuery) {
 
         // clear options
         this.options = {};
+
+        return jqXHR;
       }
   };
 });
diff --git a/lib/Config/Initializer.php b/lib/Config/Initializer.php
index b87ded06dd..2c9aed8f8a 100644
--- a/lib/Config/Initializer.php
+++ b/lib/Config/Initializer.php
@@ -33,10 +33,14 @@ class Initializer {
     $subscribers = Env::$db_prefix . 'subscribers';
     $settings = Env::$db_prefix . 'settings';
     $newsletters = Env::$db_prefix . 'newsletters';
+    $segments = Env::$db_prefix . 'segments';
+    $subscriber_segment = Env::$db_prefix . 'subscriber_segment';
 
     define('MP_SUBSCRIBERS_TABLE', $subscribers);
     define('MP_SETTINGS_TABLE', $settings);
     define('MP_NEWSLETTERS_TABLE', $newsletters);
+    define('MP_SEGMENTS_TABLE', $segments);
+    define('MP_SUBSCRIBER_SEGMENT_TABLE', $subscriber_segment);
   }
 
   function setupActivator() {
diff --git a/lib/Config/Migrator.php b/lib/Config/Migrator.php
index 30f91b7875..430815cfab 100644
--- a/lib/Config/Migrator.php
+++ b/lib/Config/Migrator.php
@@ -12,7 +12,9 @@ class Migrator {
     $this->models = array(
       'subscribers',
       'settings',
-      'newsletters'
+      'newsletters',
+      'segments',
+      'subscriber_segment'
     );
   }
 
@@ -78,6 +80,30 @@ class Migrator {
     return $this->sqlify(__FUNCTION__, $attributes);
   }
 
+  function segments() {
+    $attributes = array(
+        'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+        'name varchar(90) NOT NULL,',
+        'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+        'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+        'PRIMARY KEY  (id),',
+        'UNIQUE KEY name (name)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
+  function subscriber_segment() {
+    $attributes = array(
+      'id mediumint(9) NOT NULL AUTO_INCREMENT,',
+      'subscriber_id mediumint(9) NOT NULL,',
+      'segment_id mediumint(9) NOT NULL,',
+      'created_at TIMESTAMP NOT NULL DEFAULT 0,',
+      'updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,',
+      'PRIMARY KEY  (id)'
+    );
+    return $this->sqlify(__FUNCTION__, $attributes);
+  }
+
   private function sqlify($model, $attributes) {
     $table = $this->prefix . $model;
 
diff --git a/lib/Models/Segment.php b/lib/Models/Segment.php
new file mode 100644
index 0000000000..7716b10522
--- /dev/null
+++ b/lib/Models/Segment.php
@@ -0,0 +1,35 @@
+<?php
+namespace MailPoet\Models;
+
+if(!defined('ABSPATH')) exit;
+
+class Segment extends Model {
+  public static $_table = MP_SEGMENTS_TABLE;
+
+  function __construct() {
+    parent::__construct();
+
+    $this->addValidations('name', array(
+      'required' => 'name_is_blank',
+      'isString' => 'name_is_not_string'
+    ));
+  }
+
+  public static function createOrUpdate($model) {
+    $exists = self::where('name', $model['name'])
+      ->find_one();
+
+    if($exists === false) {
+      $new_model = self::create();
+      $new_model->name = $model['name'];
+      return $new_model->save();
+    }
+
+    $exists->name = $model['name_updated'];
+    return $exists->save();
+  }
+
+  public function subscribers() {
+    return $this->has_many_through(__NAMESPACE__ . '\Subscriber', __NAMESPACE__ . '\SubscriberSegment', 'segment_id', 'subscriber_id');
+  }
+}
diff --git a/lib/Models/Setting.php b/lib/Models/Setting.php
index 34123395b3..18e108c40e 100644
--- a/lib/Models/Setting.php
+++ b/lib/Models/Setting.php
@@ -20,11 +20,11 @@ class Setting extends Model {
   }
 
   public static function createOrUpdate($model) {
-    $exists = Setting::where('name', $model['name'])
+    $exists = self::where('name', $model['name'])
       ->find_one();
 
     if($exists === false) {
-      $new_model = Setting::create();
+      $new_model = self::create();
       $new_model->hydrate($model);
       return $new_model->save();
     }
diff --git a/lib/Models/Subscriber.php b/lib/Models/Subscriber.php
index 5f2fda7035..fe1a439ccc 100644
--- a/lib/Models/Subscriber.php
+++ b/lib/Models/Subscriber.php
@@ -1,64 +1,68 @@
-<?php
-namespace MailPoet\Models;
-
-if (!defined('ABSPATH')) exit;
-
-class Subscriber extends Model {
-  public static $_table = MP_SUBSCRIBERS_TABLE;
-
-  function __construct() {
-    parent::__construct();
-
-    $this->addValidations('email', array(
-      'required' => __('You need to enter your email address.'),
-      'isEmail' => __('Your email address is invalid.')
-    ));
-  }
-
-  static function search($orm, $search = '') {
-    if(strlen(trim($search) === 0)) {
-      return $orm;
-    }
-
-    return $orm->where_raw(
-      '(`email` LIKE ? OR `first_name` LIKE ? OR `last_name` LIKE ?)',
-      array('%'.$search.'%', '%'.$search.'%', '%'.$search.'%')
-    );
-  }
-
-  static function groups() {
-    return array(
-      array(
-        'name' => 'all',
-        'label' => __('All'),
-        'count' => Subscriber::count()
-      ),
-      array(
-        'name' => 'subscribed',
-        'label' => __('Subscribed'),
-        'count' => Subscriber::where('status', 'subscribed')->count()
-      ),
-      array(
-        'name' => 'unconfirmed',
-        'label' => __('Unconfirmed'),
-        'count' => Subscriber::where('status', 'unconfirmed')->count()
-      ),
-      array(
-        'name' => 'unsubscribed',
-        'label' => __('Unsubscribed'),
-        'count' => Subscriber::where('status', 'unsubscribed')->count()
-      )
-    );
-  }
-
-  static function group($orm, $group = null) {
-    if($group === null or !in_array(
-      $group,
-      array('subscribed', 'unconfirmed', 'unsubscribed')
-    )) {
-      return $orm;
-    }
-
-    return $orm->where('status', $group);
-  }
-}
+<?php
+namespace MailPoet\Models;
+
+if(!defined('ABSPATH')) exit;
+
+class Subscriber extends Model {
+  public static $_table = MP_SUBSCRIBERS_TABLE;
+
+  function __construct() {
+    parent::__construct();
+
+    $this->addValidations('email', array(
+      'required' => __('You need to enter your email address.'),
+      'isEmail' => __('Your email address is invalid.')
+    ));
+  }
+
+  static function search($orm, $search = '') {
+    if(strlen(trim($search) === 0)) {
+      return $orm;
+    }
+
+    return $orm->where_raw(
+      '(`email` LIKE ? OR `first_name` LIKE ? OR `last_name` LIKE ?)',
+      array('%'.$search.'%', '%'.$search.'%', '%'.$search.'%')
+    );
+  }
+
+  static function groups() {
+    return array(
+      array(
+        'name' => 'all',
+        'label' => __('All'),
+        'count' => Subscriber::count()
+      ),
+      array(
+        'name' => 'subscribed',
+        'label' => __('Subscribed'),
+        'count' => Subscriber::where('status', 'subscribed')->count()
+      ),
+      array(
+        'name' => 'unconfirmed',
+        'label' => __('Unconfirmed'),
+        'count' => Subscriber::where('status', 'unconfirmed')->count()
+      ),
+      array(
+        'name' => 'unsubscribed',
+        'label' => __('Unsubscribed'),
+        'count' => Subscriber::where('status', 'unsubscribed')->count()
+      )
+    );
+  }
+
+  static function group($orm, $group = null) {
+    if($group === null or !in_array(
+      $group,
+      array('subscribed', 'unconfirmed', 'unsubscribed')
+    )) {
+      return $orm;
+    }
+
+    return $orm->where('status', $group);
+  }
+
+  public function segments() {
+    return $this->has_many_through(__NAMESPACE__ . '\Segment', __NAMESPACE__ . '\SubscriberSegment', 'subscriber_id', 'segment_id');
+  }
+}
diff --git a/lib/Models/SubscriberSegment.php b/lib/Models/SubscriberSegment.php
new file mode 100644
index 0000000000..7be467992b
--- /dev/null
+++ b/lib/Models/SubscriberSegment.php
@@ -0,0 +1,12 @@
+<?php
+namespace MailPoet\Models;
+
+if(!defined('ABSPATH')) exit;
+
+class SubscriberSegment extends Model {
+  public static $_table = MP_SUBSCRIBER_SEGMENT_TABLE;
+
+  function __construct() {
+    parent::__construct();
+  }
+}
diff --git a/tests/_bootstrap.php b/tests/_bootstrap.php
index facf0a2583..a2d58b3b80 100644
--- a/tests/_bootstrap.php
+++ b/tests/_bootstrap.php
@@ -7,12 +7,14 @@ require_once(getenv('WP_TEST_PATH') . '/wp-load.php');
 
 $console->writeln('Cleaning up database...');
 $models = array(
-  "Subscriber",
-  "Setting",
-  "Newsletter"
+  'Subscriber',
+  'Setting',
+  'Newsletter',
+  'Segment',
+  'SubscriberSegment'
 );
 $destroy = function ($model) {
-  Model::factory("\MailPoet\Models\\" . $model)
-       ->delete_many();
+  Model::factory('\MailPoet\Models\\' . $model)
+    ->delete_many();
 };
 array_map($destroy, $models);
diff --git a/tests/unit/Models/SegmentCest.php b/tests/unit/Models/SegmentCest.php
new file mode 100644
index 0000000000..6fa9c755ea
--- /dev/null
+++ b/tests/unit/Models/SegmentCest.php
@@ -0,0 +1,120 @@
+<?php
+
+use MailPoet\Models\SubscriberSegment;
+use MailPoet\Models\Subscriber;
+use MailPoet\Models\Segment;
+
+class SegmentCest {
+  function _before() {
+    $this->before_time = time();
+    $this->data = array(
+      'name' => 'some name',
+    );
+
+    $this->segment = Segment::create();
+    $this->segment->hydrate($this->data);
+    $this->saved = $this->segment->save();
+  }
+
+  function itCanBeCreated() {
+    expect($this->saved)->equals(true);
+  }
+
+  function itHasToBeValid() {
+    expect($this->saved)->equals(true);
+    $empty_model = Segment::create();
+    expect($empty_model->save())->equals(false);
+    $validations = $empty_model->getValidationErrors();
+    expect(count($validations))->equals(2);
+  }
+
+  function itHasACreatedAtOnCreation() {
+    $segment = Segment::where('name', $this->data['name'])
+      ->findOne();
+    $time_difference = strtotime($segment->created_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itHasAnUpdatedAtOnCreation() {
+    $segment = Segment::where('name', $this->data['name'])
+      ->findOne();
+    $time_difference = strtotime($segment->updated_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itKeepsTheCreatedAtOnUpdate() {
+    $segment = Segment::where('name', $this->data['name'])
+      ->findOne();
+    $old_created_at = $segment->created_at;
+    $segment->name = 'new name';
+    $segment->save();
+    expect($old_created_at)->equals($segment->created_at);
+  }
+
+  function itUpdatesTheUpdatedAtOnUpdate() {
+    $segment = Segment::where('name', $this->data['name'])
+      ->findOne();
+    $update_time = time();
+    $segment->name = 'new name';
+    $segment->save();
+    $time_difference = strtotime($segment->updated_at) >= $update_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itCanCreateOrUpdate() {
+    $data = array(
+      'name' => 'some other new name'
+    );
+    $createNewRecord = Segment::createOrUpdate($data);
+
+    $data = array(
+      'name' => $this->data['name'],
+      'name_updated' => 'updated name',
+    );
+    $updateExistingRecord = Segment::createOrUpdate($data);
+
+    $allRecords = Segment::find_array();
+    expect(count($allRecords))->equals(2);
+    expect($allRecords[0]['name'])->equals($data['name_updated']);
+  }
+
+  function itCanHaveMultipleSubscribers() {
+    $subscribersData = array(
+      array(
+        'first_name' => 'John',
+        'last_name' => 'Mailer',
+        'email' => 'john@mailpoet.com'
+      ),
+      array(
+        'first_name' => 'Mike',
+        'last_name' => 'Smith',
+        'email' => 'mike@maipoet.com'
+      )
+    );
+    foreach ($subscribersData as $subscriberData) {
+      $subscriber = Subscriber::create();
+      $subscriber->hydrate($subscriberData);
+      $subscriber->save();
+      $association = SubscriberSegment::create();
+      $association->subscriber_id = $subscriber->id;
+      $association->segment_id = $this->segment->id;
+      $association->save();
+    }
+
+    $segment = Segment::find_one($this->segment->id);
+    $subscribers = $segment->subscribers()
+      ->find_array();
+    expect(count($subscribers))->equals(2);
+  }
+
+  function _after() {
+    ORM::for_table(Segment::$_table)
+      ->delete_many();
+    ORM::for_table(Subscriber::$_table)
+      ->delete_many();
+    ORM::for_table(SubscriberSegment::$_table)
+      ->delete_many();
+  }
+
+
+}
diff --git a/tests/unit/Models/SubscriberCest.php b/tests/unit/Models/SubscriberCest.php
index 4ebc948d6d..4480ed62be 100644
--- a/tests/unit/Models/SubscriberCest.php
+++ b/tests/unit/Models/SubscriberCest.php
@@ -1,119 +1,131 @@
-<?php
-use MailPoet\Models\Subscriber;
-
-class SubscriberCest {
-
-  function _before() {
-    $this->data = array(
-      'first_name' => 'John',
-      'last_name' => 'Mailer',
-      'email' => 'jo@mailpoet.com'
-    );
-
-    $this->subscriber = Subscriber::create();
-    $this->subscriber->hydrate($this->data);
-    $this->saved = $this->subscriber->save();
-
-    $subscribed = Subscriber::create();
-    $subscribed->hydrate(array(
-      'email' => 'marco@mailpoet.com',
-      'status' => 'subscribed'
-    ));
-    $subscribed->save();
-
-    $unsubscribed = Subscriber::create();
-    $unsubscribed->hydrate(array(
-      'email' => 'marco@mailpoet.com',
-      'status' => 'unsubscribed'
-    ));
-    $unsubscribed->save();
-  }
-
-  function itCanBeCreated() {
-    expect($this->saved)->equals(true);
-  }
-
-  function itHasAFirstName() {
-    $subscriber =
-      Subscriber::where('email', $this->data['email'])
-      ->findOne();
-    expect($subscriber->first_name)
-      ->equals($this->data['first_name']);
-  }
-
-  function itHasALastName() {
-    $subscriber =
-      Subscriber::where('email', $this->data['email'])
-      ->findOne();
-    expect($subscriber->last_name)
-      ->equals($this->data['last_name']);
-  }
-
-  function itHasAnEmail() {
-    $subscriber =
-      Subscriber::where('email', $this->data['email'])
-      ->findOne();
-    expect($subscriber->email)
-      ->equals($this->data['email']);
-  }
-
-  function itHasAStatus() {
-    $subscriber =
-      Subscriber::where('email', $this->data['email'])
-      ->findOne();
-
-    expect($subscriber->status)->equals('unconfirmed');
-  }
-
-  function itCanChangeStatus() {
-    $subscriber = Subscriber::where('email', $this->data['email'])->findOne();
-    $subscriber->status = 'subscribed';
-    expect($subscriber->save())->equals(true);
-
-    $subscriber_updated = Subscriber::where(
-      'email',
-      $this->data['email']
-    )->findOne();
-    expect($subscriber_updated->status)->equals('subscribed');
-  }
-
-  function itHasASearchFilter() {
-    $subscriber = Subscriber::filter('search', 'john')->findOne();
-    expect($subscriber->first_name)->equals($this->data['first_name']);
-
-    $subscriber = Subscriber::filter('search', 'mailer')->findOne();
-    expect($subscriber->last_name)->equals($this->data['last_name']);
-
-    $subscriber = Subscriber::filter('search', 'mailpoet')->findOne();
-    expect($subscriber->email)->equals($this->data['email']);
-  }
-
-  function itHasAGroupFilter() {
-    $subscribers = Subscriber::filter('group', 'unconfirmed')->findMany();
-    foreach($subscribers as $subscriber) {
-      expect($subscriber->status)->equals('unconfirmed');
-    }
-
-    $subscribers = Subscriber::filter('group', 'subscribed')->findMany();
-    foreach($subscribers as $subscriber) {
-      expect($subscriber->status)->equals('subscribed');
-    }
-
-    $subscribers = Subscriber::filter('group', 'unsubscribed')->findMany();
-    foreach($subscribers as $subscriber) {
-      expect($subscriber->status)->equals('unsubscribed');
-    }
-  }
-
-  function emailMustBeUnique() {
-    $conflict_subscriber = Subscriber::create();
-    $conflict_subscriber->hydrate($this->data);
-    $saved = $conflict_subscriber->save();
-    expect($saved)->equals(false);
-  }
-
-  function _after() {
-    ORM::for_table(Subscriber::$_table)
-      ->delete_many();
-  }
-}
+<?php
+use MailPoet\Models\Subscriber;
+use MailPoet\Models\Segment;
+use MailPoet\Models\SubscriberSegment;
+
+class SubscriberCest {
+
+  function _before() {
+    $this->before_time = time();
+    $this->data = array(
+      'first_name' => 'John',
+      'last_name' => 'Mailer',
+      'email' => 'john@mailpoet.com'
+    );
+
+    $this->subscriber = Subscriber::create();
+    $this->subscriber->hydrate($this->data);
+    $this->saved = $this->subscriber->save();
+  }
+
+  function itCanBeCreated() {
+    expect($this->saved)->equals(true);
+  }
+
+  function itHasAFirstName() {
+    $subscriber =
+      Subscriber::where('email', $this->data['email'])
+        ->findOne();
+    expect($subscriber->first_name)
+      ->equals($this->data['first_name']);
+  }
+
+  function itHasALastName() {
+    $subscriber =
+      Subscriber::where('email', $this->data['email'])
+        ->findOne();
+    expect($subscriber->last_name)
+      ->equals($this->data['last_name']);
+  }
+
+  function itHasAnEmail() {
+    $subscriber =
+      Subscriber::where('email', $this->data['email'])
+        ->findOne();
+    expect($subscriber->email)
+      ->equals($this->data['email']);
+  }
+
+  function emailMustBeUnique() {
+    $conflict_subscriber = Subscriber::create();
+    $conflict_subscriber->hydrate($this->data);
+    $saved = $conflict_subscriber->save();
+    expect($saved)->equals(false);
+  }
+
+  function itHasAStatus() {
+    $subscriber =
+      Subscriber::where('email', $this->data['email'])
+      ->findOne();
+
+    expect($subscriber->status)->equals('unconfirmed');
+  }
+
+  function itCanChangeStatus() {
+    $subscriber = Subscriber::where('email', $this->data['email'])->findOne();
+    $subscriber->status = 'subscribed';
+    expect($subscriber->save())->equals(true);
+
+    $subscriber_updated = Subscriber::where(
+      'email',
+      $this->data['email']
+    )->findOne();
+    expect($subscriber_updated->status)->equals('subscribed');
+  }
+
+  function itHasASearchFilter() {
+    $subscriber = Subscriber::filter('search', 'john')->findOne();
+    expect($subscriber->first_name)->equals($this->data['first_name']);
+
+    $subscriber = Subscriber::filter('search', 'mailer')->findOne();
+    expect($subscriber->last_name)->equals($this->data['last_name']);
+
+    $subscriber = Subscriber::filter('search', 'mailpoet')->findOne();
+    expect($subscriber->email)->equals($this->data['email']);
+  }
+
+  function itHasAGroupFilter() {
+    $subscribers = Subscriber::filter('group', 'unconfirmed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('unconfirmed');
+    }
+
+    $subscribers = Subscriber::filter('group', 'subscribed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('subscribed');
+    }
+
+    $subscribers = Subscriber::filter('group', 'unsubscribed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('unsubscribed');
+    }
+  }
+
+  function itCanHaveASegment() {
+    $segmentData = array(
+      'name' => 'some name'
+    );
+
+    $segment = Segment::create();
+    $segment->hydrate($segmentData);
+    $segment->save();
+    $association = SubscriberSegment::create();
+    $association->subscriber_id = $this->subscriber->id;
+    $association->segment_id = $segment->id;
+    $association->save();
+
+    $subscriber = Subscriber::find_one($this->subscriber->id);
+    $subscriberSegment = $subscriber->segments()
+      ->find_one();
+    expect($subscriberSegment->id)->equals($segment->id);
+  }
+
+  function _after() {
+    ORM::for_table(Subscriber::$_table)
+      ->delete_many();
+    ORM::for_table(Segment::$_table)
+      ->delete_many();
+    ORM::for_table(SubscriberSegment::$_table)
+      ->delete_many();
+  }
+}