diff --git a/application/Espo/Core/Binding/DefaultBinding.php b/application/Espo/Core/Binding/DefaultBinding.php
index 026d039518..52504fcb2f 100644
--- a/application/Espo/Core/Binding/DefaultBinding.php
+++ b/application/Espo/Core/Binding/DefaultBinding.php
@@ -198,16 +198,6 @@ class DefaultBinding implements BindingProcessor
             'externalAccountClientManager'
         );
 
-        $binder->bindImplementation(
-            'Espo\\Core\\WebSocket\\Sender',
-            'Espo\\Core\\WebSocket\\ZeroMQSender'
-        );
-
-        $binder->bindImplementation(
-            'Espo\\Core\\WebSocket\\Subscriber',
-            'Espo\\Core\\WebSocket\\ZeroMQSubscriber'
-        );
-
         $binder->bindImplementation(
             'Espo\\Core\\Acl\\Table\\TableFactory',
             'Espo\\Core\\Acl\\Table\\DefaultTableFactory'
diff --git a/application/Espo/Core/WebSocket/SenderFactory.php b/application/Espo/Core/WebSocket/SenderFactory.php
new file mode 100644
index 0000000000..0527903eca
--- /dev/null
+++ b/application/Espo/Core/WebSocket/SenderFactory.php
@@ -0,0 +1,66 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\WebSocket;
+
+use Espo\Core\InjectableFactory;
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Metadata;
+use Espo\Core\Exceptions\Error;
+
+class SenderFactory
+{
+    private $injectableFactory;
+
+    private $config;
+
+    private $metadata;
+
+    private const DEFAULT_MESSAGER = 'ZeroMQ';
+
+    public function __construct(InjectableFactory $injectableFactory, Config $config, Metadata $metadata)
+    {
+        $this->injectableFactory = $injectableFactory;
+        $this->config = $config;
+        $this->metadata = $metadata;
+    }
+
+    public function create(): Sender
+    {
+        $messager = $this->config->get('webSocketMessager') ?? self::DEFAULT_MESSAGER;
+
+        $className = $this->metadata->get(['app', 'webSocket', 'messagers', $messager, 'senderClassName']);
+
+        if (!$className) {
+            throw new Error("No sender for messager '{$messager}'.");
+        }
+
+        return $this->injectableFactory->create($className);
+    }
+}
diff --git a/application/Espo/Core/WebSocket/ServerStarter.php b/application/Espo/Core/WebSocket/ServerStarter.php
index 30a4c551da..256ef042e6 100644
--- a/application/Espo/Core/WebSocket/ServerStarter.php
+++ b/application/Espo/Core/WebSocket/ServerStarter.php
@@ -46,6 +46,9 @@ use Ratchet\Wamp\WampServer;
  */
 class ServerStarter
 {
+    /**
+     * @var Subscriber
+     */
     private $subscriber;
 
     private $categoriesData;
@@ -62,9 +65,9 @@ class ServerStarter
 
     private $metadata;
 
-    public function __construct(Subscriber $subscriber, Config $config, Metadata $metadata)
+    public function __construct(SubscriberFactory $subscriberFactory, Config $config, Metadata $metadata)
     {
-        $this->subscriber = $subscriber;
+        $this->subscriber = $subscriberFactory->create();
         $this->config = $config;
         $this->metadata = $metadata;
 
diff --git a/application/Espo/Core/WebSocket/Submission.php b/application/Espo/Core/WebSocket/Submission.php
index 7ee94fbcc6..e1352f7d39 100644
--- a/application/Espo/Core/WebSocket/Submission.php
+++ b/application/Espo/Core/WebSocket/Submission.php
@@ -35,13 +35,16 @@ use stdClass;
 
 class Submission
 {
+    /**
+     * @var Sender
+     */
     private $sender;
 
     private $log;
 
-    public function __construct(Sender $sender, Log $log)
+    public function __construct(SenderFactory $senderFactory, Log $log)
     {
-        $this->sender = $sender;
+        $this->sender = $senderFactory->create();
         $this->log = $log;
     }
 
diff --git a/application/Espo/Core/WebSocket/SubscriberFactory.php b/application/Espo/Core/WebSocket/SubscriberFactory.php
new file mode 100644
index 0000000000..234ddc49f5
--- /dev/null
+++ b/application/Espo/Core/WebSocket/SubscriberFactory.php
@@ -0,0 +1,66 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\WebSocket;
+
+use Espo\Core\InjectableFactory;
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Metadata;
+use Espo\Core\Exceptions\Error;
+
+class SubscriberFactory
+{
+    private $injectableFactory;
+
+    private $config;
+
+    private $metadata;
+
+    private const DEFAULT_MESSAGER = 'ZeroMQ';
+
+    public function __construct(InjectableFactory $injectableFactory, Config $config, Metadata $metadata)
+    {
+        $this->injectableFactory = $injectableFactory;
+        $this->config = $config;
+        $this->metadata = $metadata;
+    }
+
+    public function create(): Subscriber
+    {
+        $messager = $this->config->get('webSocketMessager') ?? self::DEFAULT_MESSAGER;
+
+        $className = $this->metadata->get(['app', 'webSocket', 'messagers', $messager, 'subscriberClassName']);
+
+        if (!$className) {
+            throw new Error("No subscriber for messager '{$messager}'.");
+        }
+
+        return $this->injectableFactory->create($className);
+    }
+}
diff --git a/application/Espo/Resources/defaults/config.php b/application/Espo/Resources/defaults/config.php
index a5f3b76c7d..7f078f810c 100644
--- a/application/Espo/Resources/defaults/config.php
+++ b/application/Espo/Resources/defaults/config.php
@@ -154,6 +154,7 @@ return [
     'noteEditThresholdPeriod' => '7 days',
     'emailForceUseExternalClient' => false,
     'useWebSocket' => false,
+    'webSocketMessager' => 'ZeroMQ',
     'auth2FAMethodList' => ['Totp'],
     'personNameFormat' => 'firstLast',
     'newNotificationCountInTitle' => false,
diff --git a/application/Espo/Resources/defaults/systemConfig.php b/application/Espo/Resources/defaults/systemConfig.php
index 99919f61cd..fafd54c4f9 100644
--- a/application/Espo/Resources/defaults/systemConfig.php
+++ b/application/Espo/Resources/defaults/systemConfig.php
@@ -118,6 +118,7 @@ return [
         'webSocketPort',
         'webSocketZeroMQSubscriberDsn',
         'webSocketZeroMQSubmissionDsn',
+        'webSocketMessager',
         'actualDatabaseType',
         'actualDatabaseVersion',
     ],
diff --git a/application/Espo/Resources/metadata/app/metadata.json b/application/Espo/Resources/metadata/app/metadata.json
index 58b98a2d34..b06a421d56 100644
--- a/application/Espo/Resources/metadata/app/metadata.json
+++ b/application/Espo/Resources/metadata/app/metadata.json
@@ -22,6 +22,7 @@
         ["app", "actions", "__ANY__", "implementationClassName"],
         ["app", "fieldProcessing"],
         ["app", "scheduledJobs"],
+        ["app", "webSocket", "messagers"],
         ["selectDefs"],
         ["recordDefs"],
         ["aclDefs"],
diff --git a/application/Espo/Resources/metadata/app/webSocket.json b/application/Espo/Resources/metadata/app/webSocket.json
index 37c3da4e1e..62c14dae1b 100644
--- a/application/Espo/Resources/metadata/app/webSocket.json
+++ b/application/Espo/Resources/metadata/app/webSocket.json
@@ -9,5 +9,11 @@
             "paramList": ["scope", "id"],
             "accessCheckCommand": "AclCheck --userId=:userId --scope=:scope --id=:id --action=stream"
         }
+    },
+    "messagers": {
+        "ZeroMQ": {
+            "senderClassName": "Espo\\Core\\WebSocket\\ZeroMQSender",
+            "subscriberClassName": "Espo\\Core\\WebSocket\\ZeroMQSubscriber"
+        }
     }
 }