diff --git a/lib/DI/ContainerConfigurator.php b/lib/DI/ContainerConfigurator.php
index dc587e5b89..da8ab9dd4c 100644
--- a/lib/DI/ContainerConfigurator.php
+++ b/lib/DI/ContainerConfigurator.php
@@ -256,8 +256,10 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\Segments\WooCommerce::class)->setPublic(true);
     $container->autowire(\MailPoet\Segments\SubscribersFinder::class);
     $container->autowire(\MailPoet\Segments\SegmentsRepository::class);
-    $container->autowire(\MailPoet\Segments\DynamicSegments\Filters\UserRole::class)->setPublic(true);
+    $container->autowire(\MailPoet\Segments\SegmentSubscribersRepository::class);
+    $container->autowire(\MailPoet\Segments\DynamicSegments\FilterHandler::class)->setPublic(true);
     $container->autowire(\MailPoet\Segments\DynamicSegments\Filters\EmailAction::class)->setPublic(true);
+    $container->autowire(\MailPoet\Segments\DynamicSegments\Filters\UserRole::class)->setPublic(true);
     $container->autowire(\MailPoet\Segments\DynamicSegments\Filters\WooCommerceProduct::class)->setPublic(true);
     $container->autowire(\MailPoet\Segments\DynamicSegments\Filters\WooCommerceCategory::class)->setPublic(true);
     // Services
diff --git a/lib/Entities/SegmentEntity.php b/lib/Entities/SegmentEntity.php
index d9536d487a..f6593e0161 100644
--- a/lib/Entities/SegmentEntity.php
+++ b/lib/Entities/SegmentEntity.php
@@ -105,4 +105,8 @@ class SegmentEntity {
   public function getDynamicFilters() {
     return $this->dynamicFilters;
   }
+
+  public function isDynamic(): bool {
+    return $this->getType() === self::TYPE_DYNAMIC;
+  }
 }
diff --git a/lib/Segments/DynamicSegments/FilterHandler.php b/lib/Segments/DynamicSegments/FilterHandler.php
new file mode 100644
index 0000000000..0047026bab
--- /dev/null
+++ b/lib/Segments/DynamicSegments/FilterHandler.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace MailPoet\Segments\DynamicSegments;
+
+use MailPoet\DynamicSegments\Exceptions\InvalidSegmentTypeException;
+use MailPoet\Entities\DynamicSegmentFilterEntity;
+use MailPoet\Segments\DynamicSegments\Filters\EmailAction;
+use MailPoet\Segments\DynamicSegments\Filters\UserRole;
+use MailPoet\Segments\DynamicSegments\Filters\WooCommerceCategory;
+use MailPoet\Segments\DynamicSegments\Filters\WooCommerceProduct;
+use MailPoetVendor\Doctrine\DBAL\Query\QueryBuilder;
+
+class FilterHandler {
+  /** @var EmailAction */
+  private $emailAction;
+
+  /** @var UserRole */
+  private $userRole;
+
+  /** @var WooCommerceProduct */
+  private $wooCommerceProduct;
+
+  /** @var WooCommerceCategory */
+  private $wooCommerceCategory;
+
+  public function __construct(
+    EmailAction $emailAction,
+    UserRole $userRole,
+    WooCommerceProduct $wooCommerceProduct,
+    WooCommerceCategory $wooCommerceCategory
+  ) {
+    $this->emailAction = $emailAction;
+    $this->userRole = $userRole;
+    $this->wooCommerceProduct = $wooCommerceProduct;
+    $this->wooCommerceCategory = $wooCommerceCategory;
+  }
+
+  public function apply(QueryBuilder $queryBuilder, DynamicSegmentFilterEntity $filterEntity): QueryBuilder {
+    switch ($filterEntity->getSegmentType()) {
+      case DynamicSegmentFilterEntity::TYPE_USER_ROLE:
+        return $this->userRole->apply($queryBuilder, $filterEntity);
+      case DynamicSegmentFilterEntity::TYPE_EMAIL:
+        return $this->emailAction->apply($queryBuilder, $filterEntity);
+      case DynamicSegmentFilterEntity::TYPE_WOOCOMMERCE:
+        $action = $filterEntity->getFilterDataParam('action');
+        if ($action === WooCommerceProduct::ACTION_PRODUCT) {
+          return $this->wooCommerceProduct->apply($queryBuilder, $filterEntity);
+        }
+        return $this->wooCommerceCategory->apply($queryBuilder, $filterEntity);
+      default:
+        throw new InvalidSegmentTypeException('Invalid type', InvalidSegmentTypeException::INVALID_TYPE);
+    }
+  }
+}
diff --git a/lib/Segments/SegmentSubscribersRepository.php b/lib/Segments/SegmentSubscribersRepository.php
new file mode 100644
index 0000000000..29b5abd947
--- /dev/null
+++ b/lib/Segments/SegmentSubscribersRepository.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace MailPoet\Segments;
+
+use MailPoet\Entities\SegmentEntity;
+use MailPoet\Entities\SubscriberEntity;
+use MailPoet\Entities\SubscriberSegmentEntity;
+use MailPoet\InvalidStateException;
+use MailPoet\NotFoundException;
+use MailPoet\Segments\DynamicSegments\FilterHandler;
+use MailPoetVendor\Doctrine\DBAL\Driver\Statement;
+use MailPoetVendor\Doctrine\DBAL\Query\QueryBuilder;
+use MailPoetVendor\Doctrine\ORM\EntityManager;
+use function \MailPoetVendor\array_column;
+
+class SegmentSubscribersRepository {
+  /** @var EntityManager */
+  private $entityManager;
+
+  /** @var FilterHandler */
+  private $filterHandler;
+
+  public function __construct(
+    EntityManager $entityManager,
+    FilterHandler $filterHandler
+  ) {
+    $this->entityManager = $entityManager;
+    $this->filterHandler = $filterHandler;
+  }
+
+  public function getSubscriberIdsInSegment(int $segmentId): array {
+    $segment = $this->getSegment($segmentId);
+    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
+    $queryBuilder = $this->entityManager
+      ->getConnection()
+      ->createQueryBuilder()
+      ->select("DISTINCT $subscribersTable.id")
+      ->from($subscribersTable);
+
+    if ($segment->isDynamic()) {
+      $queryBuilder = $this->filterSubscribersInDynamicSegment($queryBuilder, $segment);
+    } else {
+      $queryBuilder = $this->filterSubscribersInStaticSegment($queryBuilder, $segment);
+    }
+    $statement = $this->executeQuery($queryBuilder);
+    $result = $statement->fetchAll();
+    return array_column($result, 'id');
+  }
+
+  public function getSubscribersCount(int $segmentId): int {
+    $segment = $this->getSegment($segmentId);
+    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
+    $queryBuilder = $this->entityManager
+      ->getConnection()
+      ->createQueryBuilder()
+      ->select("DISTINCT count($subscribersTable.id)")
+      ->from($subscribersTable);
+
+    if ($segment->isDynamic()) {
+      $queryBuilder = $this->filterSubscribersInDynamicSegment($queryBuilder, $segment);
+    } else {
+      $queryBuilder = $this->filterSubscribersInStaticSegment($queryBuilder, $segment);
+    }
+    $statement = $this->executeQuery($queryBuilder);
+    $result = $statement->fetchColumn();
+    return (int)$result;
+  }
+
+  private function filterSubscribersInStaticSegment(QueryBuilder $queryBuilder, SegmentEntity $segment): QueryBuilder {
+    $subscribersSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();
+    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
+    return $queryBuilder->join(
+      $subscribersTable,
+      $subscribersSegmentsTable,
+      'subsegment',
+      "subsegment.subscriber_id = $subscribersTable.id AND subsegment.segment_id = :segment"
+    )->andWhere("$subscribersTable.deleted_at IS NULL")
+      ->andWhere("$subscribersTable.status = :status")
+      ->setParameter('segment', $segment->getId())
+      ->setParameter('status', SubscriberEntity::STATUS_SUBSCRIBED);
+  }
+
+  private function filterSubscribersInDynamicSegment(QueryBuilder $queryBuilder, SegmentEntity $segment): QueryBuilder {
+    $filters = $segment->getDynamicFilters();
+    // We don't allow dynamic segment without filers since it would return all subscribers
+    if (count($filters) === 0) {
+      throw new InvalidStateException('Missing filters for dynamic segment.');
+    }
+    foreach ($filters as $filter) {
+      $queryBuilder = $this->filterHandler->apply($queryBuilder, $filter);
+    }
+    return $queryBuilder;
+  }
+
+  private function getSegment(int $id): SegmentEntity {
+    $segment = $this->entityManager->find(SegmentEntity::class, $id);
+    if (!$segment instanceof SegmentEntity) {
+      throw new NotFoundException('Segment not found');
+    }
+    return $segment;
+  }
+
+  private function executeQuery(QueryBuilder $queryBuilder): Statement {
+    $statement = $queryBuilder->execute();
+    // Execute for select always returns statement but PHP Stan doesn't know that :(
+    if (!$statement instanceof Statement) {
+      throw new InvalidStateException('Invalid query.');
+    }
+    return $statement;
+  }
+}