diff --git a/application/Espo/Binding.php b/application/Espo/Binding.php
index 03662b47be..7f68110e61 100644
--- a/application/Espo/Binding.php
+++ b/application/Espo/Binding.php
@@ -240,6 +240,11 @@ class Binding implements BindingProcessor
             'Espo\\ORM\\PDO\\PDOProvider',
             'Espo\\ORM\\PDO\\DefaultPDOProvider'
         );
+
+        $binder->bindImplementation(
+            'Espo\\Core\\Utils\\Database\\ConfigDataProvider',
+            'Espo\\Core\\Utils\\Database\\DefaultConfigDataProvider'
+        );
     }
 
     private function bindMisc(Binder $binder): void
diff --git a/application/Espo/Core/Utils/Database/ConfigDataProvider.php b/application/Espo/Core/Utils/Database/ConfigDataProvider.php
index afe413b947..fcc9522a60 100644
--- a/application/Espo/Core/Utils/Database/ConfigDataProvider.php
+++ b/application/Espo/Core/Utils/Database/ConfigDataProvider.php
@@ -29,16 +29,7 @@
 
 namespace Espo\Core\Utils\Database;
 
-use Espo\Core\Utils\Config;
-
-class ConfigDataProvider
+interface ConfigDataProvider
 {
-    private const DEFAULT_PLATFORM = 'Mysql';
-
-    public function __construct(private Config $config) {}
-
-    public function getPlatform(): string
-    {
-        return $this->config->get('database.platform') ?? self::DEFAULT_PLATFORM;
-    }
+    public function getPlatform(): string;
 }
diff --git a/application/Espo/Core/Utils/Database/DefaultConfigDataProvider.php b/application/Espo/Core/Utils/Database/DefaultConfigDataProvider.php
new file mode 100644
index 0000000000..8144de363a
--- /dev/null
+++ b/application/Espo/Core/Utils/Database/DefaultConfigDataProvider.php
@@ -0,0 +1,44 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2023 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\Utils\Database;
+
+use Espo\Core\Utils\Config;
+
+class DefaultConfigDataProvider implements ConfigDataProvider
+{
+    private const DEFAULT_PLATFORM = 'Mysql';
+
+    public function __construct(private Config $config) {}
+
+    public function getPlatform(): string
+    {
+        return $this->config->get('database.platform') ?? self::DEFAULT_PLATFORM;
+    }
+}
diff --git a/application/Espo/Resources/defaults/systemConfig.php b/application/Espo/Resources/defaults/systemConfig.php
index aa05af152c..6ff9a6f398 100644
--- a/application/Espo/Resources/defaults/systemConfig.php
+++ b/application/Espo/Resources/defaults/systemConfig.php
@@ -75,6 +75,7 @@ return [
         'internalOutboundEmailFromAddress',
         'requiredPhpVersion',
         'requiredMysqlVersion',
+        'requiredPostgresqlVersion',
         'recommendedMysqlParams',
         'requiredPhpLibs',
         'recommendedPhpLibs',
@@ -270,6 +271,7 @@ return [
     'requiredMysqlVersion' => '5.7.0',
     'recommendedMysqlParams' => [],
     'requiredMariadbVersion' => '10.2.2',
+    'requiredPostgresqlVersion' => '15.0',
     'recommendedMariadbParams' => [],
     /** Max execution time (in seconds) allocated for a single job. If exceeded then set to Failed.*/
     'jobPeriod' => 7800,
diff --git a/application/Espo/Tools/Installer/DatabaseConfigDataProvider.php b/application/Espo/Tools/Installer/DatabaseConfigDataProvider.php
new file mode 100644
index 0000000000..366c2ac9d2
--- /dev/null
+++ b/application/Espo/Tools/Installer/DatabaseConfigDataProvider.php
@@ -0,0 +1,44 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2023 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\Tools\Installer;
+
+use Espo\Core\Utils\Database\ConfigDataProvider;
+
+class DatabaseConfigDataProvider implements ConfigDataProvider
+{
+    public function __construct(
+        private string $platform
+    ) {}
+
+    public function getPlatform(): string
+    {
+        return $this->platform;
+    }
+}
diff --git a/install/core/Installer.php b/install/core/Installer.php
index b1b31941e4..ef6279456a 100644
--- a/install/core/Installer.php
+++ b/install/core/Installer.php
@@ -32,6 +32,7 @@ use Espo\Core\Container;
 use Espo\Core\DataManager;
 use Espo\Core\InjectableFactory;
 use Espo\Core\ORM\DatabaseParamsFactory;
+use Espo\Core\Utils\Database\ConfigDataProvider;
 use Espo\Core\Utils\Database\Dbal\ConnectionFactoryFactory;
 use Espo\Core\Utils\Id\RecordIdGenerator;
 use Espo\Core\Utils\ScheduledJob as ScheduledJobUtil;
@@ -52,6 +53,7 @@ use Espo\Entities\Job;
 use Espo\Entities\ScheduledJob;
 use Espo\Entities\User;
 use Espo\ORM\Query\SelectBuilder;
+use Espo\Tools\Installer\DatabaseConfigDataProvider;
 
 class Installer
 {
@@ -299,13 +301,22 @@ class Installer
 
     public function getSystemRequirementList($type, $requiredOnly = false, array $additionalData = null)
     {
+        $platform = $additionalData['databaseParams']['platform'] ?? 'Mysql';
+
+        $dbConfigDataProvider = new DatabaseConfigDataProvider($platform);
+
         /** @var SystemRequirements $systemRequirementManager */
-         $systemRequirementManager = $this->app
+        $systemRequirementManager = $this->app
             ->getContainer()
             ->getByClass(InjectableFactory::class)
-            ->create(SystemRequirements::class);
+            ->createWithBinding(
+                SystemRequirements::class,
+                BindingContainerBuilder::create()
+                    ->bindInstance(ConfigDataProvider::class, $dbConfigDataProvider)
+                    ->build()
+            );
 
-         return $systemRequirementManager->getRequiredListByType($type, $requiredOnly, $additionalData);
+        return $systemRequirementManager->getRequiredListByType($type, $requiredOnly, $additionalData);
     }
 
     public function checkDatabaseConnection(array $rawParams, bool $createDatabase = false): void
diff --git a/install/core/actions/saveSettings.php b/install/core/actions/saveSettings.php
index 10aaecf134..d76b6250c5 100644
--- a/install/core/actions/saveSettings.php
+++ b/install/core/actions/saveSettings.php
@@ -40,15 +40,16 @@ $database = [
     'dbname' => $_SESSION['install']['db-name'],
     'user' => $_SESSION['install']['db-user-name'],
     'password' => $_SESSION['install']['db-user-password'],
+    'platform' => $_SESSION['install']['db-platform'],
 ];
 
 $host = $_SESSION['install']['host-name'];
 
-if (strpos($host,':') === false) {
+if (!str_contains($host, ':')) {
     $host .= ":";
 }
 
-list($database['host'], $database['port']) = explode(':', $host);
+[$database['host'], $database['port']] = explode(':', $host);
 
 $saveData = [
     'database' => $database,
diff --git a/install/core/actions/settingsTest.php b/install/core/actions/settingsTest.php
index be5342224a..998a5ff171 100644
--- a/install/core/actions/settingsTest.php
+++ b/install/core/actions/settingsTest.php
@@ -29,7 +29,10 @@
 
 ob_start();
 
-$result = array('success' => true, 'errors' => array());
+$result = [
+    'success' => true,
+    'errors' => [],
+];
 
 $phpRequiredList = $installer->getSystemRequirementList('php', true);
 
@@ -40,11 +43,13 @@ foreach ($phpRequiredList as $name => $details) {
             case 'version':
                 $result['success'] = false;
                 $result['errors']['phpVersion'] = $details['required'];
+
                 break;
 
             default:
                 $result['success'] = false;
                 $result['errors']['phpRequires'][] = $name;
+
                 break;
         }
     }
@@ -52,14 +57,22 @@ foreach ($phpRequiredList as $name => $details) {
 
 $allPostData = $postData->getAll();
 
-if ($result['success'] && !empty($allPostData['dbName']) && !empty($allPostData['hostName']) && !empty($allPostData['dbUserName'])) {
+if (
+    $result['success'] &&
+    !empty($allPostData['dbName']) &&
+    !empty($allPostData['hostName']) &&
+    !empty($allPostData['dbUserName'])
+) {
     $connect = false;
 
     $dbName = trim($allPostData['dbName']);
-    if (strpos($allPostData['hostName'],':') === false) {
+
+    if (!str_contains($allPostData['hostName'], ':')) {
         $allPostData['hostName'] .= ":";
     }
-    list($hostName, $port) = explode(':', trim($allPostData['hostName']));
+
+    [$hostName, $port] = explode(':', trim($allPostData['hostName']));
+
     $dbUserName = trim($allPostData['dbUserName']);
     $dbUserPass = trim($allPostData['dbUserPass']);
 
@@ -67,7 +80,10 @@ if ($result['success'] && !empty($allPostData['dbName']) && !empty($allPostData[
         $port = null;
     }
 
+    $platform = $allPostData['dbPlatform'] ?? 'Mysql';
+
     $databaseParams = [
+        'platform' => $platform,
         'host' => $hostName,
         'port' => $port,
         'user' => $dbUserName,
@@ -79,7 +95,8 @@ if ($result['success'] && !empty($allPostData['dbName']) && !empty($allPostData[
 
     try {
         $installer->checkDatabaseConnection($databaseParams, true);
-    } catch (\Exception $e) {
+    }
+    catch (\Exception $e) {
         $isConnected = false;
         $result['success'] = false;
         $result['errors']['dbConnect']['errorCode'] = $e->getCode();
@@ -92,16 +109,17 @@ if ($result['success'] && !empty($allPostData['dbName']) && !empty($allPostData[
 
         foreach ($databaseRequiredList as $name => $details) {
             if (!$details['acceptable']) {
-
                 switch ($details['type']) {
                     case 'version':
                         $result['success'] = false;
                         $result['errors'][$name] = $details['required'];
+
                         break;
 
                     default:
                         $result['success'] = false;
                         $result['errors'][$name][] = $name;
+
                         break;
                 }
             }
diff --git a/install/core/actions/setupConfirmation.php b/install/core/actions/setupConfirmation.php
index f6f3cdfd46..b0eeabece2 100644
--- a/install/core/actions/setupConfirmation.php
+++ b/install/core/actions/setupConfirmation.php
@@ -39,6 +39,7 @@ $dbConfig = [
     'dbname' => $installData['db-name'],
     'user' => $installData['db-user-name'],
     'password' => $installData['db-user-password'],
+    'platform' => $installData['db-platform']
 ];
 
 $mysqlRequirementList = $installer->getSystemRequirementList('database', false, ['databaseParams' => $dbConfig]);
diff --git a/install/core/actions/step2.php b/install/core/actions/step2.php
index 0adb00bbfc..7ece04ccce 100644
--- a/install/core/actions/step2.php
+++ b/install/core/actions/step2.php
@@ -43,30 +43,39 @@ foreach ($clearedCookieList as $cookieName) {
 
 $config = $installer->getConfig();
 
-$fields = array(
-    'db-driver' => array(
+$fields = [
+    'db-platform' => [
+        'default' => $config->get('database.platform', 'Mysql'),
+    ],
+    'db-driver' => [
         'default' => $config->get('database.driver', ''),
-    ),
-    'db-name' => array(
+    ],
+    'db-name' => [
         'default' => $config->get('database.dbname', ''),
-    ),
-    'host-name' => array(
-        'default' => $config->get('database.host', '') . ($config->get('database.port') ? ':' . $config->get('database.port') : ''),
-    ),
-    'db-user-name' => array(
+    ],
+    'host-name' => [
+        'default' => $config->get('database.host', '') .
+            ($config->get('database.port') ? ':' . $config->get('database.port') : ''),
+    ],
+    'db-user-name' => [
         'default' => $config->get('database.user', ''),
-    ),
-    'db-user-password' => array(
-        //'default' => $config->get('database.password', ''),
-    ),
-);
+    ],
+    'db-user-password' => [],
+];
 
 foreach ($fields as $fieldName => $field) {
     if (isset($_SESSION['install'][$fieldName])) {
         $fields[$fieldName]['value'] = $_SESSION['install'][$fieldName];
     } else {
-        $fields[$fieldName]['value'] = isset($field['default']) ? $field['default'] : '';
+        $fields[$fieldName]['value'] = $field['default'] ?? '';
     }
 }
 
+$platforms = [
+    'Mysql' => 'MySQL',
+    'Postgresql' => 'PostgreSQL',
+];
+
+$smarty->assign('platforms', $platforms);
+
 $smarty->assign('fields', $fields);
diff --git a/install/core/i18n/en_US/install.json b/install/core/i18n/en_US/install.json
index ab940db6a9..526cdedcff 100644
--- a/install/core/i18n/en_US/install.json
+++ b/install/core/i18n/en_US/install.json
@@ -56,6 +56,7 @@
     "fields": {
         "Choose your language": "Choose your language",
         "Database Name": "Database Name",
+        "Platform": "Platform",
         "Host Name": "Host Name",
         "Port": "Port",
         "Database User Name": "Database User Name",
diff --git a/install/core/tpl/step2.tpl b/install/core/tpl/step2.tpl
index 49e9fb864b..b89fb8f275 100644
--- a/install/core/tpl/step2.tpl
+++ b/install/core/tpl/step2.tpl
@@ -6,6 +6,23 @@
         <div class="row">
             <div class=" col-md-6">
                 <div class="row">
+                    <div class="cell cell-db-platform col-sm-12 form-group">
+                        <label class="field-label-db-platform control-label">{$langs['fields']['Platform']}</label>
+                        <div class="field field-db-platform">
+                            <select
+                                name="db-platform"
+                                class="main-element form-control"
+                            >
+                            {foreach from=$platforms item=lbl key=val}
+                                {if $val == $fields['db-platform'].value}
+                                <option selected="selected" value="{$val}">{$lbl}</option>
+                                {else}
+                                <option value="{$val}">{$lbl}</option>
+                                {/if}
+                            {/foreach}
+                            </select>
+                        </div>
+                    </div>
                     <div class="cell cell-website col-sm-12 form-group">
                             <label class="field-label-website control-label">{$langs['fields']['Host Name']} *</label>
                             <div class="field field-website">
diff --git a/public/install/js/install.js b/public/install/js/install.js
index 2260be6dff..aed84d1b77 100644
--- a/public/install/js/install.js
+++ b/public/install/js/install.js
@@ -363,6 +363,7 @@ InstallScript.prototype.finish = function() {
 }
 
 InstallScript.prototype.setConnSett = function() {
+    this.connSett.dbPlatform = $('[name="db-platform"]').val();
 	this.connSett.dbName = $('[name="db-name"]').val();
 	this.connSett.hostName = $('[name="host-name"]').val();
 	this.connSett.dbUserName = $('[name="db-user-name"]').val();